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Difficulty: MediumComprehending Explicit Comparisons and Contrasts

While Charles Babbage’s Difference Engine was designed solely to tabulate polynomial equations by executing a fixed series of additions, his proposed Analytical Engine represented a monumental paradigm shift in computation. Unlike the Difference Engine, which could only perform one pre-determined mathematical operation, the Analytical Engine was designed to execute a wide variety of tasks using instructions encoded on punched cards. Furthermore, whereas the Difference Engine lacked a system for branching or conditional logic, the Analytical Engine featured a control unit capable of loops and conditional path selections based on intermediate calculation results.

According to the passage, which of the following represents an explicit contrast between Babbage's Difference Engine and his Analytical Engine?

  1. A
    The Analytical Engine relied solely on a fixed series of additions, whereas the Difference Engine featured a control unit for loops and conditional branching.
  2. B
    The Difference Engine was designed for general-purpose programmable tasks, while the Analytical Engine was created exclusively to solve polynomial equations.
  3. C
    The Analytical Engine was capable of performing multiple pre-determined calculations simultaneously, while the Difference Engine was limited to consecutive additions.
  4. The Analytical Engine could execute diverse tasks using instructions on punched cards, whereas the Difference Engine could perform only a single pre-determined operation.Answer

Answer

The Analytical Engine could execute diverse tasks using instructions on punched cards, whereas the Difference Engine could perform only a single pre-determined operation.
The correct answer is correct because the passage explicitly contrasts the two machines by stating that the Difference Engine 'could only perform one pre-determined mathematical operation,' while the Analytical Engine 'was designed to execute a wide variety of tasks using instructions encoded on punched cards.' This matches the literal facts presented in the passage.

Step-by-Step Solution

1
Locate the explicit statements regarding the capabilities and operations of Babbage's Difference Engine in the passage.
The passage states that the Difference Engine was 'designed solely to tabulate polynomial equations by executing a fixed series of additions' and 'could only perform one pre-determined mathematical operation.'
This establishes the baseline constraints of the first machine being compared.
2
Locate the explicit statements regarding the capabilities and operations of Babbage's Analytical Engine in the passage.
The passage states that the Analytical Engine was 'designed to execute a wide variety of tasks using instructions encoded on punched cards.'
This identifies the distinct features of the second machine.
3
Compare the located facts to identify the correct contrast between the two engines.
The Analytical Engine's capacity for diverse tasks via punched cards directly contrasts with the Difference Engine's limitation to a single pre-determined operation, which matches the correct option.
By contrasting these two explicit facts, we confirm the correct option.

Key Concept

Identifying explicitly stated differences between two subjects in a reading passage.
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Topics

Comprehending Explicit Comparisons and Contrasts

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