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 3 of 8

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Q21.

What can be overwritten if the copied buffer is long enough in a function that defines the following local variables: int counter; char string[8]; float number;?

Only number.

Only counter.

Only string.

Number and possibly whatever resides after it in memory.

Discuss

Answer: (d).Number and possibly whatever resides after it in memory. Explanation:If the copied buffer is long enough, it might overwrite number, and possibly whatever resides after it in memory.

Q22.

What happens if the copied buffer overwrites the function’s return address?

The function tries to return to the caller by invoking the RET instruction.

The CPU will jump to whatever address was stored in CopiedBuffer + 0x10.

An attacker can take control over a system.

All of the above.

Discuss

Answer: (d).All of the above. Explanation:If the copied buffer overwrites the function’s return address, the function tries to return to the caller by invoking the RET instruction, the CPU will try to jump to whatever address was stored in CopiedBuffer + 0x10, and an attacker can take control over a system.

Q23.

What is a simple way to create a stack overflow vulnerability?

Neglecting to perform bounds checking on incoming data

Checking the length of incoming data

Dynamically allocating stack space based on incoming data

Preallocating enough room in the stack for the largest chunk of data

Discuss

Answer: (a).Neglecting to perform bounds checking on incoming data Explanation:Neglecting to perform bounds checking on incoming data is a simple way to create a stack overflow vulnerability.

Q24.

What happens when a buffer of an unknown size is copied over into a limited-sized stack buffer?

The buffer is truncated to fit into the memory space allocated for it

The copy operation is aborted

Anything residing after the buffer in the stack is overwritten

The program crashes

Discuss

Answer: (c).Anything residing after the buffer in the stack is overwritten Explanation:Anything residing after the buffer in the stack is overwritten when a buffer of an unknown size is copied over into a limited-sized stack buffer.

Q25.

What is the most likely candidate to be stored in registers instead of the stack?

The return address

The local variables

The function parameters

The program counter

Discuss

Answer: (b).The local variables Explanation:The local variables are the most likely candidate to be stored in registers instead of the stack.

Q26.

What happens when a function tries to return to the caller?

The CPU jumps to the function's return address

The CPU jumps to the beginning of the function

The CPU jumps to a random memory location

The CPU stops executing instructions

Discuss

Answer: (a).The CPU jumps to the function's return address Explanation:When a function tries to return to the caller, the CPU jumps to the function's return address.

Q27.

What is a common payload used in a typical buffer overflow?

A short code sequence

A long code sequence

A random sequence of characters

A binary file

Discuss

Answer: (a).A short code sequence Explanation:A short code sequence is a common payload used in a typical buffer overflow.

Q28.

What is a strategy for determining the current stack address in a target program?

Perform some educated guesses

Read the program's source code

Consult the program's documentation

Use a third-party tool

Discuss

Answer: (a).Perform some educated guesses Explanation:Performing some educated guesses is a strategy for determining the current stack address in a target program.

Q29.

What is a classic case of a trivial overflow bug?

A function that receives a null-terminated string as input and copies that string into a local variable

A function that performs bounds checking on incoming data

A function that dynamically allocates stack space based on incoming data

A function that preallocates enough room in the stack for the largest chunk of data

Discuss

Answer: (a).A function that receives a null-terminated string as input and copies that string into a local variable Explanation:A function that receives a null-terminated string as input and copies that string into a local variable is a classic case of a trivial overflow bug.

Q30.

What is an example of a tool that can be used to disassemble a program?

WinDbg

Microsoft Word

Adobe Photoshop

Google Chrome

Discuss

Answer: (a).WinDbg Explanation:The other options, Microsoft Word, Adobe Photoshop, and Google Chrome, are not relevant to disassembling programs and are therefore incorrect.

Page 3 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 3 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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