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Question 41Question →

A media company is building an online blogging platform on AWS. The platform requires a database tier to support two distinct use cases: first, it needs to store customer subscription details, billing history, and support complex SQL join queries for financial reports; second, it needs to store user session states, preferences, and unstructured comment metadata with single-digit millisecond latency. Which AWS database services should the company select to meet these requirements? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Amazon Aurora; Amazon DynamoDB

Answer

Amazon Aurora and Amazon DynamoDB should be selected.
Amazon Aurora provides a high-performance relational database engine compatible with MySQL and PostgreSQL, making it the ideal choice for structured data requiring ACID compliance, complex SQL queries, and transactional integrity, such as subscription billing. Amazon DynamoDB is a fully managed NoSQL database service that provides single-digit millisecond latency at any scale, making it ideal for high-throughput, unstructured data such as user sessions, preferences, and comments.

Step-by-Step Solution

1
Analyze the first requirement: storing customer subscription details, billing history, and supporting complex SQL join queries.
Identify that a relational database (OLTP) is required for structured data and complex joins. Amazon Aurora fits this requirement.
Relational databases support ACID compliance and relational models necessary for billing and SQL operations.
2
Analyze the second requirement: storing user session states, preferences, and unstructured comment metadata with single-digit millisecond latency.
Identify that a highly scalable NoSQL database is required for unstructured data and low-latency access. Amazon DynamoDB fits this requirement.
DynamoDB is a fully managed NoSQL database designed for fast, predictable performance at scale.

Key Concept

Distinguishing between relational (OLTP) and non-relational (NoSQL) database services in AWS based on application requirements.
Question 42Question →

A digital art auction platform hosts live virtual auctions once a week for exactly one hour. During this hour, user traffic increases five-fold, while the platform remains mostly idle for the rest of the week. Under their traditional on-premises model, the company had to purchase and configure high-end servers to handle this short weekly peak, which resulted in low resource utilization. By migrating to AWS, the company can automatically scale their resources up during the auction hour and scale down afterwards. Which AWS Cloud benefit is most directly demonstrated by this transition?

Show answer & explanation

Answer: Stop guessing capacity

Answer

Stop guessing capacity
The correct answer is the option focusing on stopping capacity guesswork. Under an on-premises model, organizations often must provision resources based on maximum predicted peak demand, leading to idle capacity and wasted costs. AWS eliminates this by allowing systems to automatically scale up and down to match actual demand in real-time.

Step-by-Step Solution

1
Analyze the business scenario and identify the infrastructure challenges.
The company has highly variable traffic (a short weekly peak) and suffers from low resource utilization because they pre-provisioned physical hardware to meet that peak.
Understanding the current challenge is essential to mapping it to the correct AWS Cloud benefit.
2
Compare the transition to AWS features (automatic scaling up/down) with the six benefits of the AWS Cloud.
Automatically scaling resources to match demand instead of pre-purchasing peak capacity aligns with the benefit of 'Stop guessing capacity'.
This directly maps the solution to the correct cloud benefit, which addresses the inefficiency of over-provisioning.

Key Concept

Stop guessing capacity
Question 43Question →

A financial services company uses Amazon S3 Glacier Flexible Retrieval to archive historical transaction records for compliance auditing. Under the AWS Shared Responsibility Model, which of the following security and operational tasks are the sole responsibility of the customer? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Configuring Vault Lock policies to enforce compliance and prevent modification of archives; Managing Identity and Access Management (IAM) policies to regulate user access to the vault

Answer

The customer is responsible for configuring Vault Lock policies to enforce compliance and managing Identity and Access Management (IAM) policies to regulate user access to the vault.
Under the AWS Shared Responsibility Model, the customer is responsible for security 'in' the cloud. For Amazon S3 Glacier, this includes configuring Vault Lock policies to enforce compliance and managing IAM policies to regulate user access. These are control plane configurations managed entirely by the customer.

Step-by-Step Solution

1
Identify the service type and model boundary.
Amazon S3 Glacier is a managed service where AWS handles the underlying infrastructure and virtualization.
Understanding the service type helps distinguish between infrastructure tasks managed by AWS and data/access configurations managed by the customer.
2
Evaluate each operational task against the Shared Responsibility Model.
Vault Lock policies and IAM configurations are data integrity and access control responsibilities (customer's job). Media disposal, host OS patching, and compliance portal access are infrastructure and global compliance responsibilities (AWS's job or AWS Artifact's domain).
This isolates the tasks that fall under customer configuration rather than AWS infrastructure management.

Key Concept

Shared Responsibility Model for Managed Services
Question 44Question →

A financial institution needs to retain historical transaction logs to meet regulatory compliance requirements. These logs are rarely accessed but must be kept secure for seven years. The institution can tolerate a retrieval time of 12 hours for any requested log. Which AWS storage service is the most cost-effective choice for this storage requirement?

Show answer & explanation

Answer: Amazon S3 Glacier Deep Archive

Answer

Amazon S3 Glacier Deep Archive is the most cost-effective choice because it is specifically designed for long-term archival storage with retrieval times of up to 12 hours.
Amazon S3 Glacier Deep Archive is the correct choice because it is AWS's lowest-cost storage class, specifically optimized for archiving data that is rarely accessed and can tolerate retrieval times of up to 12 hours.

Step-by-Step Solution

1
Analyze the workload requirements: long-term retention (7 years), rare access, high tolerance for retrieval latency (12 hours), and a primary focus on cost optimization.
The requirements point toward an archival storage solution rather than active performance-focused storage.
Identifying the data access patterns and latency tolerance helps narrow down the service class.
2
Compare the features and pricing of the available storage classes and services.
Amazon S3 Glacier Deep Archive provides the lowest storage cost on AWS with standard retrieval times within 12 hours.
This step determines the exact service that matches the cost-efficiency and retrieval-time requirements.

Key Concept

Selecting the appropriate AWS storage service based on access patterns, durability, retention length, and cost constraints.
Estimated Time:45s
Question 45Question →

A company is migrating its application to AWS and requires a database solution that supports transactional SQL queries. Additionally, the company wants to minimize administrative overhead by ensuring that OS patching and database engine maintenance are handled by AWS. Which two of the following options represent correct services or architectural decisions for this setup? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Deploying Amazon Aurora to run the transactional database workloads; Selecting a managed service like Amazon RDS to offload database engine patching and OS maintenance to AWS

Answer

The correct choices are deploying Amazon Aurora to run transactional database workloads and selecting a managed service like Amazon RDS to offload patching and OS maintenance to AWS.
Deploying Amazon Aurora and selecting Amazon RDS are correct because both are fully managed relational database services that support SQL queries and transactional workloads. As managed services, they automatically handle infrastructure provisioning, operating system patching, and database engine maintenance, reducing administrative overhead for the customer.

Step-by-Step Solution

1
Identify the database type required by the application.
The application requires a database that supports transactional SQL queries, indicating a relational database.
Relational databases use SQL and are designed for transactional integrity, whereas NoSQL databases like DynamoDB are optimized for key-value or document structures.
2
Determine the administrative requirements for the database.
The database management tasks such as OS patching and database engine maintenance must be handled by AWS to minimize overhead.
Managed services like Amazon RDS and Amazon Aurora offload administrative tasks to AWS as part of the AWS Shared Responsibility Model.

Key Concept

AWS managed relational database services, such as Amazon RDS and Amazon Aurora, provide standard SQL transactional support while offloading database administration tasks (like OS patching and database engine updates) to AWS under the Shared Responsibility Model.
Question 46Question →

A genomics research institute processes large datasets for DNA sequencing. These analysis runs occur sporadically, lasting only a few days each month, but require high-performance computing resources. Additionally, the institute wants to eliminate the operational overhead of managing physical hardware, power, and cooling in their local server rooms.

Which two benefits of the AWS Cloud directly address this institute's requirements? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Stop spending money running and maintaining data centers; Stop guessing capacity

Answer

The benefits of stopping spending money running and maintaining data centers and stopping guessing capacity are correct.
The correct options are the statements focusing on stopping running and maintaining data centers and stopping guessing capacity. The institute's goal to eliminate the overhead of managing hardware, cooling, and power in local server rooms maps directly to stopping the operation of physical data centers. The sporadic sequencing runs map directly to the ability to avoid guessing capacity, as the institute can spin up large scale resources only when they need them and shut them down afterwards.

Step-by-Step Solution

1
Analyze the business requirements from the scenario.
The institute has two needs: first, handling highly variable, sporadic workloads (large runs lasting a few days per month); second, removing physical hardware management tasks (cooling, power, server maintenance).
Understanding the specific operational and financial pain points guides the selection of the correct AWS Cloud benefits.
2
Map the requirement of handling sporadic workloads to the correct AWS Cloud benefit.
The benefit of 'Stop guessing capacity' is the direct solution, as it allows scaling resources dynamically to match the sporadic peaks without buying excess hardware.
AWS allows scaling up and down as needed, eliminating the risk of underprovisioning or paying for idle resources.
3
Map the requirement of eliminating physical hardware management overhead to the correct AWS Cloud benefit.
The benefit of 'Stop spending money running and maintaining data centers' is the direct solution, as AWS handles all physical infrastructure logistics.
By using AWS, the institute shifts focus from racking servers and cooling rooms to analyzing genomic data.

Key Concept

The six core benefits of cloud computing as defined by AWS.
Question 47Question →

A company is migrating a legacy retail web application to AWS. The application uses a traditional relational database that requires complex SQL transactional queries and table joins. The company wants a fully managed solution that reduces administrative tasks such as hardware provisioning, database setup, patching, and backups, while separating the database tier from the application tier to ensure high availability. Which database solution should the company choose?

Show answer & explanation

Answer: Amazon RDS

Answer

Amazon RDS
Amazon RDS is the correct choice because it is a managed relational database service that supports SQL queries and table joins while automating database administration tasks such as backups, software patching, and hardware scaling.

Step-by-Step Solution

1
Analyze the application's database requirements
The application requires a relational database that supports complex SQL queries and table joins.
This rules out non-relational database services such as key-value stores.
2
Evaluate the management and operational overhead requirements
The company wants a fully managed service to reduce administrative tasks like patching and backups.
This rules out self-managed options like hosting database engines directly on Amazon EC2 instances.
3
Select the appropriate managed AWS database service
Amazon RDS provides a fully managed relational database platform that automates provisioning, patching, and backups while separating the database from the application tier.
It matches both the relational nature of the workload and the requirement for reduced administrative overhead.

Key Concept

AWS managed relational database service selection versus self-managed or NoSQL alternatives.
Estimated Time:1m 30s
Question 48Question →

An administrator needs to perform a one-time audit of the security group configurations for several Amazon EC2 instances. The administrator wants to visually review the inbound and outbound traffic rules through an interactive graphical interface in a web browser without writing scripts or using command-line commands. Which AWS tool or interface should the administrator use to meet these requirements?

Show answer & explanation

Answer: AWS Management Console

Answer

AWS Management Console
The AWS Management Console is a web-based portal that provides a graphical user interface (GUI) for managing AWS resources. It is the most appropriate tool for an administrator who needs to visually inspect security group rules in a web browser without writing code or executing shell commands.

Step-by-Step Solution

1
Analyze the requirements: the task is a one-time audit, requires a visual review of configurations (security group rules), must use a graphical web browser interface, and must avoid scripting or command-line commands.
Identified that the interface must be web-based, graphical, manual, and require no programming or terminal input.
This filters out tools that rely on scripting, coding, or text-based command execution.
2
Evaluate the available AWS interaction methods against these criteria: AWS Management Console is a web graphical user interface; AWS CLI is a command-line tool; AWS SDK is for programmatic code; AWS CloudFormation is for template-based infrastructure provisioning.
AWS Management Console is the only option that fits the requirement for an interactive graphical web interface for manual tasks.
Matching the user requirement to the correct AWS tool ensures operational efficiency for the specific task type.

Key Concept

AWS Management Console is the primary web-based graphical user interface used to access and manage AWS resources manually.
Question 49Question →

An organization is designing a governance and monitoring strategy on AWS. They need to meet the following operational requirements:

1. Continuously evaluate and audit resource configurations against predefined security policies (such as verifying that all EBS volumes are encrypted).
2. Collect, track, and analyze performance metrics from their cloud resources, and configure automated alarms if utilization exceeds specific thresholds.

Which of the following AWS services should the organization select to meet these requirements? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: AWS Config; Amazon CloudWatch

Answer

AWS Config and Amazon CloudWatch
AWS Config allows organizations to continuously evaluate and audit their resource configurations against compliance rules, such as verifying encryption. Amazon CloudWatch collects, monitors, and analyzes operational metrics from resources, enabling users to set up real-time alarms for metric thresholds like high CPU usage.

Step-by-Step Solution

1
Analyze the first requirement: continuously evaluating and auditing resource configurations against policies.
AWS Config is the designated service that tracks configuration history and evaluates compliance against custom or managed rules.
This addresses the auditing aspect of resource states, such as checking if storage volumes are encrypted.
2
Analyze the second requirement: collecting performance metrics and configuring alarms based on usage thresholds.
Amazon CloudWatch collects performance metrics (like CPU usage) and allows users to set up alerts via CloudWatch Alarms.
This addresses the operational monitoring and alerting requirements.
3
Evaluate the distractors to verify why they do not meet the core criteria.
AWS CloudTrail tracks actions but not performance metrics, AWS CloudFormation deploys resources but does not monitor them, and AWS Artifact delivers compliance agreements rather than configuration rules.
Ensures the selected pair is the only combination that fully addresses the scenario.

Key Concept

Understanding the difference between configuration compliance tools (AWS Config), performance monitoring systems (Amazon CloudWatch), and event audit logging (AWS CloudTrail).
Question 50Question →

A company hires a new systems administrator who needs daily access to manage Amazon EC2 instances and Amazon RDS databases. Which of the following is the AWS-recommended best practice for granting this administrator access?

Show answer & explanation

Answer: Create an individual IAM user for the administrator, attach policies granting only the necessary permissions, and require multi-factor authentication (MFA).

Answer

Create an individual IAM user for the administrator, attach policies granting only the necessary permissions, and require multi-factor authentication (MFA).
The correct approach is to create an individual IAM user with policies that grant only the required permissions for managing EC2 and RDS, and to secure the user with multi-factor authentication. This adheres to the principle of least privilege and ensures individual accountability.

Step-by-Step Solution

1
Identify the security requirements for daily administrative access to AWS resources.
Determine that the administrator needs specific access to EC2 and RDS, requiring individual credentials and multi-factor authentication.
Individual accountability and multi-factor authentication are core security practices.
2
Evaluate the options against AWS Identity and Access Management (IAM) best practices.
Determine that using individual IAM users with least privilege permissions meets these best practices, while avoiding the root user, permanent role login, or outsourcing IAM tasks to AWS.
This alignment ensures the account remains secure and follows the principle of least privilege.

Key Concept

IAM Best Practices for Daily Administration
Question 51Question →

A cloud architect is designing the network security for a SaaS application's web servers running on Amazon EC2 instances in a VPC. To establish a defense-in-depth strategy, the architect plans to use both Security Groups and Network Access Control Lists (Network ACLs). Which of the following statements correctly describe the characteristics and differences between these two firewall layers? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Security groups operate at the Amazon EC2 instance level, whereas Network ACLs operate at the subnet level.; Security groups are stateful, meaning return traffic is automatically allowed, whereas Network ACLs are stateless and require explicit outbound rules for return traffic.

Answer

Security groups operate at the Amazon EC2 instance level and are stateful firewalls, while Network ACLs operate at the subnet level and are stateless firewalls.
Security groups are stateful firewalls operating at the instance level (ENI), allowing return traffic automatically without needing an explicit outbound rule. Network ACLs are stateless firewalls operating at the subnet level, requiring explicit rules for both inbound and outbound traffic paths.

Step-by-Step Solution

1
Determine the operating boundary of Security Groups and Network ACLs.
Security groups are applied directly to EC2 instances (via elastic network interfaces), whereas Network ACLs are associated with entire subnets.
This establishes the scope of control for each firewall layer.
2
Analyze how connection states are processed by both firewalls.
Security groups automatically allow return traffic for established connections (stateful), while Network ACLs do not remember connection states and require matching rules in both directions (stateless).
This differentiates the traffic flow logic between the two security mechanisms.

Key Concept

Understanding the architectural differences between Security Groups and Network ACLs, specifically focusing on their evaluation level (instance vs. subnet) and state tracking behavior (stateful vs. stateless).
Estimated Time:1m 30s
Question 52Question →

A company is migrating a containerized application to AWS. The application runs on multiple Amazon Elastic Container Service (Amazon ECS) tasks hosted on AWS Fargate. These tasks must concurrently share access to a common directory containing data files that are frequently updated. The storage solution must scale automatically as files are added or deleted, and must support standard Linux file system permissions. Which AWS storage service should the company select to meet these requirements?

Show answer & explanation

Answer: Amazon Elastic File System (Amazon EFS)

Answer

Amazon Elastic File System (Amazon EFS)
The correct answer is Amazon Elastic File System (Amazon EFS) because it is a fully managed, serverless file storage service that supports the Network File System (NFSv4) protocol. It allows concurrent read and write access from multiple AWS Fargate tasks and supports standard Linux file system permissions (POSIX), scaling automatically as files are added or removed.

Step-by-Step Solution

1
Analyze the requirements: concurrent shared access, automatic scaling, and support for standard Linux (POSIX) file system permissions.
Identify that the solution must be a shared file system (file storage) rather than block or object storage.
Block storage is typically restricted to a single instance, and object storage does not natively support standard POSIX file system permissions.
2
Evaluate the available AWS storage services against these requirements.
Select Amazon EFS because it offers elastic, serverless file storage that supports POSIX permissions and can be mounted concurrently by multiple Fargate tasks.
This matches all criteria: concurrent access, auto-scaling, and POSIX compliance.

Key Concept

AWS Shared File Storage vs Block and Object Storage
Estimated Time:1m 30s
Question 53Question →

A financial technology (FinTech) firm is optimizing its cloud operations. The infrastructure team must configure a mechanism to automatically notify administrators via email if the actual database spend exceeds a defined threshold of 10,00010,000 in a single month. Concurrently, the business development team needs to visualize and analyze historical cost data grouped by cost allocation tags over the past quarter to identify cost-saving opportunities. Which two AWS Billing and Cost Management tools should the firm use to satisfy these demands? (Select TWO)

Select all that apply

Show answer & explanation

Answer: AWS Budgets; AWS Cost Explorer

Answer

AWS Budgets and AWS Cost Explorer
AWS Budgets is the correct tool for setting up email alerts when monthly database costs exceed a 10,00010,000 threshold, as it supports proactive monitoring. AWS Cost Explorer is the correct tool for retrospective visualization and analysis of historical costs grouped by cost allocation tags over the past quarter.

Step-by-Step Solution

1
Identify the service required to set up proactive alerts when actual database spending exceeds a specified threshold.
AWS Budgets is identified as the correct tool because it allows setting budget thresholds and sending email notifications when costs exceed these limits.
AWS Budgets is designed for proactive budget monitoring and threshold-based alerting.
2
Identify the tool required to visualize and analyze historical cost trends grouped by cost allocation tags over the past quarter.
AWS Cost Explorer is identified as the correct tool because it provides a visual interface to query, filter, and group historical cost and usage data.
AWS Cost Explorer is designed for retrospective, interactive analysis of actual historical usage and cost.

Key Concept

Differentiation between proactive billing tools (AWS Budgets) and retrospective analysis tools (AWS Cost Explorer) in AWS Billing and Cost Management.
Estimated Time:2m 0s
Question 54Question →

An enterprise wants to deploy a multi-tier web application on AWS with high availability. The database tier must replicate data synchronously to a standby instance in a separate, independent facility with its own power infrastructure, cooling, and network connectivity, located within the same geographic territory. Which of the following AWS Global Infrastructure components should the database instances be deployed across to achieve this configuration?

Show answer & explanation

Answer: Availability Zones

Answer

Availability Zones
Availability Zones are distinct physical locations within an AWS Region. Each Availability Zone consists of one or more discrete data centers, each with redundant power, networking, and connectivity. Because they are close enough to be connected by low-latency, high-speed fiber networks, they support synchronous data replication for highly available database configurations, while remaining isolated from localized failures in other Availability Zones.

Step-by-Step Solution

1
Analyze the requirements: high availability, synchronous database replication, and placement in separate, independent facilities within the same geographic territory.
The requirement calls for distinct physical facilities that are close enough to allow for low-latency synchronous replication, but isolated from local failures.
This establishes the criteria for the correct AWS infrastructure component.
2
Compare the options against the criteria.
Availability Zones are isolated physical locations within a single Region, interconnected by low-latency networks, which matches the criteria perfectly.
This identifies Availability Zones as the correct answer and eliminates the other options.

Key Concept

AWS Availability Zones provide physical isolation and low-latency connectivity within a Region to enable high availability and fault tolerance.
Estimated Time:1m 0s
Question 55Question →

A company is preparing to launch a critical web application on AWS and requires technical support with a response time of less than 30 minutes for business-critical system outages. Additionally, they need proactive operational reviews and assistance with launch planning (Infrastructure Event Management) included in their plan. They want access to a team of Technical Account Managers (TAMs) to coordinate their support needs but do not require a dedicated TAM. Which is the minimum AWS Support plan that meets these requirements?

Show answer & explanation

Answer: Enterprise On-Ramp

Answer

Enterprise On-Ramp
Enterprise On-Ramp is the minimum support plan that satisfies all criteria. It provides a response time of less than 30 minutes for business-critical system down cases, includes access to a pool of Technical Account Managers (TAMs) for operational and architectural guidance, and includes Infrastructure Event Management (IEM) for launch planning.

Step-by-Step Solution

1
Analyze the required SLA response times for business-critical outages.
The requirement specifies a response time of less than 30 minutes. Business Support has a 1-hour SLA, Developer has a 12-hour business day SLA, Enterprise On-Ramp has a 30-minute SLA, and Enterprise has a 15-minute SLA. This narrows the choices to Enterprise On-Ramp and Enterprise.
To determine which support plans meet the speed of support required for critical issues.
2
Compare the Technical Account Manager (TAM) and event support requirements against the remaining support plans.
The requirement specifies access to a pool of TAMs (not a dedicated/designated TAM) and included Infrastructure Event Management (IEM). Enterprise On-Ramp provides a pool of TAMs and includes IEM. Enterprise provides a dedicated TAM, which exceeds the pool requirement.
To find the most cost-effective (minimum) plan that fulfills the management and event planning criteria.

Key Concept

AWS Support Plans
Estimated Time:1m 30s
Question 56Question →

A logistics company is running a telemetry tracking platform on AWS. The finance team needs to configure a solution that automatically sends an email notification if the forecasted monthly spend on Amazon EC2 instances is projected to exceed a specific dollar amount. Which AWS tool or service should the company use to meet this requirement?

Show answer & explanation

Answer: AWS Budgets

Answer

AWS Budgets is the correct tool because it enables the setup of proactive alerts based on both actual and forecasted AWS cost and usage metrics.
The correct service is AWS Budgets. It allows you to create custom budgets that track your cost and usage, and automatically notifies you when your actual or forecasted costs exceed the budget threshold you set.

Step-by-Step Solution

1
Identify the operational requirement.
The requirement asks for a tool that can automatically send alerts when forecasted monthly costs exceed a set limit.
This helps narrow down tools to those capable of active threshold monitoring and notifications.
2
Differentiate between proactive monitoring and reactive/estimation tools.
AWS Budgets supports proactive alerts for forecasted or actual costs. AWS Cost Explorer is primarily for retrospective analysis and visualization. AWS Pricing Calculator is for pre-deployment estimates. AWS Billing Conductor is for custom billing rules.
Choosing the correct tool requires distinguishing their primary operational purposes.

Key Concept

Differentiating AWS cost management tools by their primary functions, specifically using AWS Budgets for proactive notifications versus AWS Cost Explorer for analysis.
Question 57Question →

A company is planning to connect multiple Amazon Virtual Private Clouds (VPCs) in their AWS environment. Which of the following statements correctly describe the features of AWS Transit Gateway and VPC Peering? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: AWS Transit Gateway acts as a centralized hub to connect multiple VPCs and on-premises networks.; VPC Peering establishes a direct point-to-point routing connection between two VPCs.

Answer

AWS Transit Gateway acts as a centralized hub to connect multiple VPCs and on-premises networks, and VPC Peering establishes a direct point-to-point routing connection between two VPCs.
The correct statements identify that AWS Transit Gateway simplifies multi-VPC networks by acting as a central hub, while VPC Peering provides direct, point-to-point connectivity between pairs of VPCs.

Step-by-Step Solution

1
Analyze the connection requirements for multiple VPCs.
Identify that connecting multiple VPCs individually via point-to-point links (VPC Peering) leads to complex mesh networks, whereas a centralized router (AWS Transit Gateway) simplifies connectivity.
To distinguish between point-to-point and hub-and-spoke network architectures in AWS.
2
Evaluate the routing properties of VPC Peering.
Confirm that VPC Peering is non-transitive and only connects the two specific peering VPCs directly.
To identify valid communication paths in VPC peering arrangements.

Key Concept

VPC Peering vs. AWS Transit Gateway connectivity characteristics
Question 58Question →

A gaming company is deploying two distinct workloads on Amazon EC2: 1. A backend database cluster for multiplayer matchmaking that must run continuously 24/7 with steady, predictable performance. 2. Batch data processing jobs that analyze game telemetry nightly, can be interrupted at any time, and do not have a strict completion deadline. Which two Amazon EC2 pricing models should the company select to achieve the lowest cost for these workloads? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Reserved Instances to host the matchmaking database cluster; Spot Instances to run the telemetry batch processing jobs

Answer

The company should select Reserved Instances to host the matchmaking database cluster and Spot Instances to run the telemetry batch processing jobs.
The database cluster requires 24/7 continuous and predictable performance, making Reserved Instances the optimal choice due to their term-commitment discount. The telemetry batch processing jobs can tolerate interruptions and do not have a strict completion window, making Spot Instances the most cost-effective option because they utilize spare AWS capacity at significant discounts.

Step-by-Step Solution

1
Analyze the requirements for the first workload (matchmaking database cluster).
The database requires 24/7 continuous operation with steady, predictable performance.
Since the resource utilization is predictable and constant, the company can commit to a 1-year or 3-year term using Reserved Instances or Savings Plans to optimize costs.
2
Analyze the requirements for the second workload (telemetry batch processing jobs).
The jobs run nightly, can tolerate interruptions, and have no strict completion deadline.
Since these jobs are fault-tolerant and flexible, Spot Instances are the most cost-effective model, offering up to 90% savings by utilizing spare capacity.

Key Concept

AWS EC2 pricing models (Reserved Instances and Spot Instances) match different workload predictability and fault tolerance requirements.
Question 59Question →

An organization is planning to deploy two workloads on Amazon EC2: a stateless batch processing application that can be interrupted at any time and resumed later, and a development server that is run for only a few hours each day during active testing. Which of the following AWS pricing options represent the most cost-effective choices for these workloads? (Select TWO)

Select all that apply

Show answer & explanation

Answer: Spot Instances to run the batch processing application at the lowest cost; On-Demand Instances for the development server to pay only for the hours it is actively running

Answer

Spot Instances to run the batch processing application at the lowest cost, and On-Demand Instances for the development server to pay only for the hours it is actively running.
The correct options are the choices to use Spot Instances for the batch processing application, and On-Demand Instances for the development server. Spot Instances are ideal for flexible, interruptible, and stateless workloads because they offer spare AWS capacity at deep discounts. On-Demand Instances are perfect for short-term, unpredictable, or intermittent workloads like development servers because you only pay for the time the instance is running and can shut it down to stop billing, without any long-term commitment.

Step-by-Step Solution

1
Analyze the requirements for the batch processing workload.
The batch processing workload is stateless, can be interrupted, and needs to be highly cost-optimized.
Since the workload can tolerate interruptions, it can take advantage of the steep discounts offered by utilizing spare capacity.
2
Determine the best pricing model for the batch processing workload.
Spot Instances are identified as the most cost-effective fit because they provide spare capacity at up to 90% off On-Demand rates.
Spot Instances fit workloads that are flexible, stateless, and interruptible.
3
Analyze the requirements for the development server.
The development server runs for only a few hours per day and requires reliable availability when the developer is testing.
The server needs to run without sudden interruptions during testing, but does not need to run 24/7.
4
Determine the best pricing model for the development server.
On-Demand Instances are identified as the most suitable fit since they can be stopped when not in use to avoid charges, with no long-term commitment.
Paying only for active hours via On-Demand is cheaper than committing to a 1- or 3-year term for a server that is mostly turned off.

Key Concept

Selecting optimal Amazon EC2 pricing models (Spot vs. On-Demand vs. Reserved vs. Dedicated) based on workload stability, predictability, and duration.
Estimated Time:1m 0s
Question 60Question →

A global retail platform is expanding its customer support operations. The platform needs to implement two new features: a conversational chatbot to automatically answer frequently asked questions about order statuses, and a real-time text translation system to help support agents communicate with customers who speak different languages. Which two AWS services should the platform use to meet these requirements? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Amazon Lex; Amazon Translate

Answer

Amazon Lex and Amazon Translate
The correct services are Amazon Lex and Amazon Translate. Amazon Lex provides the automatic speech recognition and natural language understanding capabilities needed to build a conversational chatbot that can interact with users. Amazon Translate provides fast, high-quality, neural machine translation of text, which allows support agents to interact in real-time with customers who speak different languages.

Step-by-Step Solution

1
Analyze the first requirement: building a conversational chatbot to answer frequently asked questions.
Identify that the primary AWS service for building conversational interfaces is Amazon Lex.
Amazon Lex uses the same conversational engine that powers Amazon Alexa, enabling natural language understanding and automated speech recognition.
2
Analyze the second requirement: translating customer and agent messages in real-time.
Identify that the primary AWS service for language translation is Amazon Translate.
Amazon Translate is designed specifically to translate text between languages, supporting multilingual communication for customer support.

Key Concept

Selecting appropriate AWS Machine Learning services based on business requirements for chatbots and translation.
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