Welcome to the Auditing Program Binaries MCQs Page

Dive deep into the fascinating world of Auditing Program Binaries with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Auditing Program Binaries, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Auditing Program Binaries, 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.

Check out the MCQs below to embark on an enriching journey through Auditing Program Binaries. 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 Auditing Program Binaries. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Auditing Program Binaries MCQs | Page 4 of 8

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Q31.

How are parameters passed in cdecl functions?

They are pushed onto the stack by the caller

They are passed in registers

They are passed in a special data segment

They are passed through global variables

Discuss

Answer: (a).They are pushed onto the stack by the caller Explanation:In cdecl functions, the parameters are unwound by the caller and pushed onto the stack.

Q32.

What is the disadvantage of the optimization chosen by the compiler for unwinding function parameters?

It makes the code harder to read

It makes the code slower

It creates a buffer overflow vulnerability

It causes stack alignment issues

Discuss

Answer: (a).It makes the code harder to read Explanation:This approach makes for a slightly less "reverser-friendly" function because every time the stack is accessed through ESP, you have to try to figure out where ESP is pointing to for each instruction.

Q33.

Why does the function end up using a bit more stack space?

Because the parameters from each of the function calls made during the function's lifetime stay in the stack for the remainder of the function.

Because the stack space is generally not a problem in user-mode threads in Windows.

Because the ESP references in the function access the same place multiple times.

Because the function was defined with the cdecl calling convention.

Discuss

Answer: (a).Because the parameters from each of the function calls made during the function's lifetime stay in the stack for the remainder of the function. Explanation:The function ends up using a bit more stack space because the parameters from each of the function calls made during the function's lifetime stay in the stack for the remainder of the function.

Q34.

Which type of threads in Windows have a very limited stack space?

User-mode threads

Kernel-mode threads

System threads

Interrupt threads

Discuss

Answer: (b).Kernel-mode threads Explanation:Kernel-mode threads in Windows have a very limited stack space.

Q35.

What is the disadvantage of the function's stack unwinding approach from the program's perspective?

The function ends up using a bit more stack space.

The stack space is generally not a problem in user-mode threads in Windows.

The program cannot determine how many parameters the function takes.

The function uses a lot of CPU resources.

Discuss

Answer: (a).The function ends up using a bit more stack space. Explanation:The disadvantage of the function's stack unwinding approach from the program's perspective is that the function ends up using a bit more stack space because the parameters from each of the function calls made during the function's lifetime stay in the stack for the remainder of the function.

Q36.

Why is it important to ensure that the code that’s accessing a large block of stack space is properly aware of its size?

To prevent the function from crashing

To prevent buffer overflows

To ensure the function runs faster

To prevent memory leaks

Discuss

Answer: (b).To prevent buffer overflows Explanation:It is important to ensure that the code that’s accessing a large block of stack space is properly aware of its size to prevent buffer overflows.

Q37.

What are intrinsic implementations?

Functions that are part of the C runtime library

Functions that are automatically inserted into the calling function by the compiler

Functions that are called using a separate library

Functions that are implemented by the programmer

Discuss

Answer: (b).Functions that are automatically inserted into the calling function by the compiler Explanation:Intrinsic implementations are functions that are automatically inserted into the calling function by the compiler, rather than calling the runtime library implementation.

Q38.

Why are string-manipulation routines historically a reason for vulnerabilities?

They are too complex for most programmers to use

They are too slow and inefficient

They often involve manipulating memory buffers whose size is not checked

They require external libraries to be included in the code

Discuss

Answer: (c).They often involve manipulating memory buffers whose size is not checked Explanation:String-manipulation routines are historically a reason for vulnerabilities because they often involve manipulating memory buffers whose size is not checked, leading to potential buffer overflows.

Q39.

What is the aim of using automatic, compiler-generated stack checking?

To prevent buffer overflow bugs from occurring

To generate random numbers for the stack

To stop program execution immediately

To execute malicious code

Discuss

Answer: (a).To prevent buffer overflow bugs from occurring Explanation:The aim of using automatic, compiler-generated stack checking is to prevent buffer overflow bugs from occurring.

Q40.

How does automatic, compiler-generated stack checking work?

It pushes an extra cookie or canary to the stack between the last local variable and the function’s return address.

It executes malicious code to detect buffer overflow bugs.

It generates random numbers for the stack.

It prevents the execution of any kind of code.

Discuss

Answer: (a).It pushes an extra cookie or canary to the stack between the last local variable and the function’s return address. Explanation:Automatic, compiler-generated stack checking works by pushing an extra cookie or canary to the stack between the last local variable and the function’s return address.

Page 4 of 8

Low Level Software 🔒

Windows Fundamentals 🔒

Reversing Tools 🔒

Reversing Malware 🔒

Antireversing Techniques 🔒

Breaking Protections 🔒

Reversing .NET 🔒

Deciphering Code Structures 🔒

Deciphering Program Data 🔒

Welcome to the Auditing Program Binaries MCQs Page

Auditing Program Binaries MCQs | Page 4 of 8

Explore more Topics under Reverse Engineering

Introduction to Reverse Engineering

Beyond the Documentation

Deciphering File Formats

Piracy and Copy Protection

Decompilation

Understanding Compiled Arithmetic

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