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Welcome to the Low Level Software MCQs Page

Dive deep into the fascinating world of Low Level Software with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Low Level Software, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Low Level Software, 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 Low Level Software. 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 Low Level Software. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Low Level Software MCQs | Page 19 of 30

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Q181.
What is the purpose of incrementing ESP by the specified number of bytes after popping the instruction pointer in assembly language?

a.

To restore EBP back to its original position as it was before the current function was called and before any parameters were pushed onto the stack

b.

To restore ESP back to its original position as it was before the current function was called and before any parameters were pushed onto the stack

c.

To push the instruction pointer onto the stack

d.

To call a function

Discuss
Answer: (b).To restore ESP back to its original position as it was before the current function was called and before any parameters were pushed onto the stack Explanation:RET can be instructed to increment ESP by the specified number of bytes after popping the instruction pointer. This is needed for restoring ESP back to its original position as it was before the current function was called and before any parameters were pushed onto the stack.
Q182.
What is a calling convention in assembly language?

a.

A way of determining which operand to use for a function call

b.

A way of determining the order in which function arguments are pushed onto the stack

c.

A way of determining the type of comparison to use in a conditional branch

d.

A way of determining the size of operands in a CMP instruction

Discuss
Answer: (b).A way of determining the order in which function arguments are pushed onto the stack Explanation:Calling conventions are a way of determining the order in which function arguments are pushed onto the stack.
Q183.
What does the CALL instruction do in assembly language?

a.

Calls a function

b.

Returns to the caller

c.

Compares two operands

d.

Moves data from memory to a register

Discuss
Answer: (a).Calls a function Explanation:The CALL instruction in assembly language is used to call a function.
Q184.
What does the CMP instruction do in assembly language?

a.

Calls a function

b.

Returns to the caller

c.

Compares two operands

d.

Moves data from memory to a register

Discuss
Answer: (c).Compares two operands Explanation:The CMP instruction in assembly language is used to compare two operands.
Q185.
What does the JNZ instruction do in assembly language?

a.

Calls a function

b.

Returns to the caller

c.

Compares two operands

d.

Jumps to a specified code address if the zero flag is not set

Discuss
Answer: (d).Jumps to a specified code address if the zero flag is not set Explanation:The JNZ instruction in assembly language is a version of the Jcc (conditional branch) group of instructions that jumps to a specified code address if the zero flag is not set.
Q186.
What does the MOV instruction do in assembly language?

a.

Calls a function

b.

Returns to the caller

c.

Compares two operands

d.

Moves data from memory to a register

Discuss
Answer: (d).Moves data from memory to a register Explanation:The MOV instruction in assembly language is used to move data from memory to a register.
Q187.
What is the purpose of the IMUL instruction?

a.

To add two operands

b.

To subtract two operands

c.

To multiply two operands

d.

To divide two operands

Discuss
Answer: (c).To multiply two operands Explanation:The IMUL instruction is used to multiply two operands.
Q188.
What would you need to do to accurately determine what the fifth value pushed onto the stack represents?

a.

Look at the entire program and examine how it uses the stack

b.

Look at the entire function and examine how it uses the stack

c.

Look at the entire program and examine how it uses registers

d.

Look at the entire function and examine how it uses registers

Discuss
Answer: (b).Look at the entire function and examine how it uses the stack Explanation:To accurately determine what the fifth value pushed onto the stack represents, you would need to look at the entire function and examine how it uses the stack.
Q189.
What percentage of modern software is implemented using high-level languages and goes through a compiler before being shipped to customers?

a.

50%

b.

75%

c.

99%

d.

100%

Discuss
Answer: (c).99% Explanation:It is safe to say that 99 percent of all modern software is implemented using high-level languages and goes through some sort of compiler prior to being shipped to customers.
Q190.
Why is it helpful to develop a general understanding of compilers?

a.

To better understand the software developer's original intentions

b.

To cope with the difficulties involved in deciphering compiler-generated code

c.

To improve the efficiency of arithmetic sequences

d.

To make software easier to read

Discuss
Answer: (b).To cope with the difficulties involved in deciphering compiler-generated code Explanation:Developing an understanding of the processes undertaken by compilers and the way they "perceive" the code will help in eventually deciphering their output, which can be difficult to read.
Page 19 of 30

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