Welcome to the Antireversing Techniques MCQs Page

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

Antireversing Techniques MCQs | Page 8 of 15

Explore more Topics under Reverse Engineering

01

Introduction to Reverse Engineering

02

Low Level Software 🔒

03

Windows Fundamentals 🔒

04

Reversing Tools 🔒

05

Beyond the Documentation

06

Deciphering File Formats

07

Auditing Program Binaries 🔒

08

Reversing Malware 🔒

09

Piracy and Copy Protection

10

Breaking Protections 🔒

11

Reversing .NET 🔒

12

Decompilation

13

Deciphering Code Structures 🔒

14

Understanding Compiled Arithmetic

15

Deciphering Program Data 🔒

Q71.

What is a potential consequence of modifying the program code to make it more difficult for reversers to understand the program flow?

The program may not function as intended

Hardware breakpoints may be prevented from being set

All types of debuggers may be detected

Execution time of the program may be significantly increased

Discuss

Answer: (a).The program may not function as intended Explanation:Modifying the program code to make it more difficult for reversers to understand the program flow may lead to unintended consequences and may cause the program to not function as intended.

Q72.

What is the strategy of confusing disassemblers as a means of preventing or inhibiting reversers?

Converting invalid data into valid data

Converting valid data into invalid data

Converting random data into valid data

Converting valid data into random data

Discuss

Answer: (b).Converting valid data into invalid data Explanation:In processor architectures that use variable-length instructions, it is possible to trick disassemblers into incorrectly treating invalid data as the beginning of an instruction.

Q73.

What is the difference between linear sweep and recursive traversal in disassembly?

Linear sweep disassembles instructions sequentially, while recursive traversal follows the control flow instructions in the program.

Linear sweep disassembles instructions recursively, while recursive traversal follows the control flow instructions in the program.

Linear sweep disassembles instructions based on their length, while recursive traversal disassembles instructions randomly.

Linear sweep disassembles instructions based on their location, while recursive traversal disassembles instructions based on their length.

Discuss

Answer: (a).Linear sweep disassembles instructions sequentially, while recursive traversal follows the control flow instructions in the program. Explanation:Linear sweep is the trivial approach that simply disassembles instruction sequentially in the entire module. Recursive traversal is the more intelligent approach whereby instructions are analyzed by traversing instructions while following the control flow instructions in the program.

Q74.

Which type of disassembler is more reliable and tolerant of antidisassembly tricks?

Linear sweep disassembler

Recursive traversal disassembler

Both disassemblers are equally reliable

It depends on the specific antidisassembly trick being used

Discuss

Answer: (b).Recursive traversal disassembler Explanation:Recursive traversal disassemblers are more reliable and are far more tolerant of various antidisassembly tricks.

Q75.

Which of the following is NOT a potential effect of confusing disassemblers?

Reversers may lose synchronization

The disassembler may incorrectly disassemble the code

The disassembler may crash

The program may terminate unexpectedly

Discuss

Answer: (c).The disassembler may crash Explanation:While confusing disassemblers can cause reversers to lose synchronization and result in incorrect disassembly of code, it is unlikely to cause a disassembler to crash.

Q76.

What is an opaque predicate?

A predicate that is always true

A predicate that is always false

A predicate that appears to be conditional, but is essentially unconditional

A predicate that appears to be unconditional, but is essentially conditional

Discuss

Answer: (c).A predicate that appears to be conditional, but is essentially unconditional Explanation:An opaque predicate is a type of false branch, where the branch appears to be conditional, but is essentially unconditional. It confuses recursive traversal disassemblers into incorrectly disassembling data.

Q77.

What is the difference between linear sweep and recursive traversal disassemblers?

Linear sweep disassemblers are easier to trick than recursive traversal disassemblers.

Recursive traversal disassemblers are easier to trick than linear sweep disassemblers.

Linear sweep disassemblers perform a recursive traversal on the code, while recursive traversal disassemblers contain specific heuristics that deal with complex code sequences.

Recursive traversal disassemblers perform a recursive traversal on the code, while linear sweep disassemblers contain specific commands that inform the disassembler whether a certain byte is code or data.

Discuss

Answer: (a).Linear sweep disassemblers are easier to trick than recursive traversal disassemblers. Explanation:Linear sweep disassemblers are easier to trick than recursive traversal disassemblers because they do not have specific heuristics to deal with complex code sequences.

Q78.

Which disassemblers can properly disassemble code with opaque predicates?

IDA Pro

OllyDbg

Both IDA Pro and OllyDbg

Neither IDA Pro nor OllyDbg

Discuss

Answer: (c).Both IDA Pro and OllyDbg Explanation:Both IDA Pro and OllyDbg contain specific commands that inform the disassembler whether a certain byte is code or data. To properly disassemble code with opaque predicates, one would have to inform the disassembler that the junk byte is really data and not code.

Q79.

What is the purpose of the pseudorandom values in the macro?

To make it easier to search and replace

To make it harder to search and replace

To create unique symbol names

None of the above

Discuss

Answer: (b).To make it harder to search and replace Explanation:The pseudorandom values are used to make it harder to search and replace.

Q80.

Why is the LINE macro used in the macro?

To make it easier to search and replace

To create unique symbol names

To improve the performance of the program

None of the above

Discuss

Answer: (b).To create unique symbol names Explanation:The LINE macro is used to create unique symbol names in case the macro is used repeatedly in the same function.

Page 8 of 15

Low Level Software 🔒

Windows Fundamentals 🔒

Reversing Tools 🔒

Auditing Program Binaries 🔒

Reversing Malware 🔒

Breaking Protections 🔒

Reversing .NET 🔒

Deciphering Code Structures 🔒

Deciphering Program Data 🔒

Welcome to the Antireversing Techniques MCQs Page

Antireversing Techniques MCQs | Page 8 of 15

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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