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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 6 of 7

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Q51.
How are 64-bit integers usually added?

a.

Using the ADD instruction only

b.

Using the ADC instruction only

c.

Using the SUB instruction

d.

Using the ADD and ADC instructions

Discuss
Answer: (d).Using the ADD and ADC instructions Explanation:Sixty-four-bit integers are usually added by combining the ADD instruction with the ADC (add with carry) instruction.
Q52.
What is the difference between the ADD and ADC instructions?

a.

ADD sets the carry flag and ADC clears it

b.

ADD clears the carry flag and ADC sets it

c.

ADD and ADC both set the carry flag

d.

ADD and ADC both clear the carry flag

Discuss
Answer: (b).ADD clears the carry flag and ADC sets it Explanation:The ADC instruction is very similar to the standard ADD, with the difference that it also adds the value of the carry flag (CF) to the result.
Q53.
Which parts of the operands are added using the regular ADD instruction?

a.

Lower 32 bits

b.

Upper 32 bits

c.

Both lower and upper 32 bits

d.

None of the above

Discuss
Answer: (a).Lower 32 bits Explanation:The lower 32 bits of both operands are added using the regular ADD instruction.
Q54.
How are the upper 32 bits of the operands added?

a.

Using the ADD instruction

b.

Using the ADC instruction

c.

Using the SUB instruction

d.

Using the MUL instruction

Discuss
Answer: (b).Using the ADC instruction Explanation:The upper 32 bits are added using ADC, so that the result from the previous addition is taken into account.
Q55.
What is the purpose of type casting in programs?

a.

To hide data types from view

b.

To perform type conversions

c.

To establish the exact data type in program binaries

d.

To perform arithmetic operations on data types

Discuss
Answer: (b).To perform type conversions Explanation:Type casting is used to perform type conversions in programs.
Q56.
Which instruction is used to increase the size of an unsigned integer?

a.

MOVZX

b.

MOV

c.

ADD

d.

SUB

Discuss
Answer: (a).MOVZX Explanation:MOVZX instruction is used to increase the size of an unsigned integer.
Q57.
What happens during zero extending?

a.

The source operand is copied into the larger destination operand

b.

The most significant bits are set to zero regardless of the source operand’s value

c.

The source operand is converted to a different data type

d.

The most significant bits are set to one regardless of the source operand’s value

Discuss
Answer: (a).The source operand is copied into the larger destination operand Explanation:During zero extending, the source operand is copied into the larger destination operand and the most significant bits are set to zero regardless of the source operand's value.
Q58.
Which operands are supported by MOVZX instruction for conversion?

a.

8-bit to 16-bit or 32-bit operands

b.

16-bit to 32-bit or 64-bit operands

c.

32-bit to 64-bit operands

d.

64-bit to 128-bit operands

Discuss
Answer: (a).8-bit to 16-bit or 32-bit operands Explanation:MOVZX instruction supports conversion from 8-bit to 16-bit or 32-bit operands or from 16-bit operands into 32-bit operands.
Q59.
What is sign extending used for?

a.

To increase the size of an unsigned integer

b.

To increase the size of a signed integer

c.

To convert a signed integer to an unsigned integer

d.

To convert an unsigned integer to a signed integer

Discuss
Answer: (b).To increase the size of a signed integer Explanation:Sign extending is used to increase the size of a signed integer.
Q60.
What is the purpose of type conversions in programming?

a.

To hide data types from view

b.

To increase the size of unsigned integers

c.

To cast signed integers into larger signed integers

d.

To convert between different data types

Discuss
Answer: (d).To convert between different data types Explanation:The purpose of type conversions in programming is to convert between different data types.
Page 6 of 7

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