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Welcome to the Understanding Compiled Arithmetic MCQs Page

Dive deep into the fascinating world of Understanding Compiled Arithmetic with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Understanding Compiled Arithmetic, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Understanding Compiled Arithmetic, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Reverse Engineering.

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Check out the MCQs below to embark on an enriching journey through Understanding Compiled Arithmetic. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Reverse Engineering.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Understanding Compiled Arithmetic. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Understanding Compiled Arithmetic MCQs | Page 3 of 7

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Discuss
Answer: (c).They try to bring the divisor or multiplier as close as possible to a convenient number. Explanation:The general strategy for computers dealing with multiplication and division is to try and bring the divisor or multiplier as close as possible to a convenient number that is easily represented by the number system.
Q22.
What is the most efficient instruction to use when multiplying two variables?
Discuss
Answer: (d).MUL/IMUL Explanation:The MUL/IMUL instruction is generally the most efficient tool when multiplying two variables.
Q23.
What do compilers usually do when the multiplier is a constant?
Discuss
Answer: (b).Use SHL and ADD instructions Explanation:When the multiplier is a constant, compilers usually avoid using MUL/IMUL instructions and instead use SHL and ADD instructions.
Q24.
What is the equivalent of multiplying by powers of 2 in computers?
Discuss
Answer: (a).Binary shifts using SHL and SHR instructions Explanation:The equivalent of multiplying by powers of 2 in computers is performing binary shifts using the SHL and SHR instructions.
Q25.
What is the latency of the SHL instruction?
Discuss
Answer: (d).4 clock cycles Explanation:The latency of the SHL instruction is 4 clock cycles.
Q26.
What is the most complex operation in integer arithmetic for computers?
Discuss
Answer: (d).Division Explanation:Division is the most complex operation in integer arithmetic for computers.
Q27.
Which built-in instructions are relatively slow and have a high latency in computers?
Discuss
Answer: (c).DIV and IDIV Explanation:The built-in instructions for division, DIV and IDIV, are relatively slow and have a latency of over 50 clock cycles.
Q28.
Why is using DIV usually bad for performance but good for reversers?
Discuss
Answer: (b).It makes code more readable. Explanation:Using DIV is usually bad for performance but good for reversers because it makes for readable and straightforward code.
Discuss
Answer: (a).The situation becomes more complicated. Explanation:With constant divisors, the situation becomes far more complicated.
Discuss
Answer: (a).A technique for division optimization. Explanation:Reciprocal multiplication is an optimized division technique.
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