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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.

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Antireversing Techniques MCQs | Page 13 of 15

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Q121.
How can inlining and outlining be combined to create an effective obfuscation technique?

a.

By duplicating random pieces of code and creating dedicated functions for them

b.

By replacing every call into a function with an actual in-place copy of it and then outlining the duplicated functions

c.

By eliminating the internal abstractions created by the software developer and then outlining the code sequences

d.

None of the above

Discuss
Answer: (b).By replacing every call into a function with an actual in-place copy of it and then outlining the duplicated functions Explanation:One interesting enhancement suggested in [Collberg3] is to combine inlining with outlining in order to create a highly potent transformation. This means that you replace every call into a function with an actual in-place copy of it and then outline the duplicated functions.
Q122.
What is code interleaving?

a.

A technique to make code execution faster

b.

A technique to make code smaller in size

c.

A technique to make code difficult to read

d.

A technique to make code more efficient

Discuss
Answer: (c).A technique to make code difficult to read Explanation:Code interleaving is a technique to interleave the implementations of two or more functions so that they become difficult to read.
Q123.
Why is code interleaving considered a potent obfuscation technique?

a.

Because it makes code execution faster

b.

Because it makes code smaller in size

c.

Because it makes code difficult to read

d.

Because it makes code more efficient

Discuss
Answer: (c).Because it makes code difficult to read Explanation:Code interleaving is considered a potent obfuscation technique because it makes the code difficult to read.
Q124.
What is an opaque predicate in the context of code interleaving?

a.

A function that is difficult to read

b.

A function that is easy to read

c.

A jump that is difficult to identify

d.

A jump that is easy to identify

Discuss
Answer: (c).A jump that is difficult to identify Explanation:An opaque predicate in the context of code interleaving is a jump that is difficult to identify and follows each function segment.
Q125.
Why is an unconditional jump not used in place of an opaque predicate?

a.

Because it would make code execution slower

b.

Because it would make code larger in size

c.

Because it would make automated deobfuscation trivial

d.

Because it would make the code too difficult to read

Discuss
Answer: (c).Because it would make automated deobfuscation trivial Explanation:An unconditional jump is not used in place of an opaque predicate because it would make automated deobfuscation trivial.
Q126.
What determines the effectiveness of opaque predicates in fooling human reversers?

a.

How confusing they are

b.

How simple they are

c.

How small they are

d.

How efficient they are

Discuss
Answer: (a).How confusing they are Explanation:The effectiveness of opaque predicates in fooling human reversers depends on how confusing they are.
Q127.
What is an additional obfuscation technique that can be used in conjunction with code interleaving?

a.

Inlining

b.

Outlining

c.

Loop unrolling

d.

Sharing the same entry point and adding a parameter

Discuss
Answer: (d).Sharing the same entry point and adding a parameter Explanation:An additional obfuscation technique that can be used in conjunction with code interleaving is sharing the same entry point and adding a parameter to tell the new function which of the code paths to take.
Q128.
What is the advantage of using the additional obfuscation technique with code interleaving?

a.

It makes the code execution faster

b.

It makes the code smaller in size

c.

It makes the code more efficient

d.

It can be highly confusing if the functions are functionally irrelevant

Discuss
Answer: (d).It can be highly confusing if the functions are functionally irrelevant Explanation:The advantage of using the additional obfuscation technique with code interleaving is that it can be highly confusing if the functions are functionally irrelevant.
Q129.
What is the purpose of ordering transformations?

a.

To improve runtime performance

b.

To confuse human reversers

c.

To make code more readable

d.

To reduce code size

Discuss
Answer: (b).To confuse human reversers Explanation:The purpose of ordering transformations is to shuffle the order of operations in a program, making it more difficult for human reversers to understand.
Q130.
Why is it not always possible to change the order of operations in a program?

a.

Because ordering transformations are irrelevant for automated obfuscation tools

b.

Because many program operations are codependent

c.

Because it would reduce code size

d.

Because it would improve runtime performance

Discuss
Answer: (b).Because many program operations are codependent Explanation:Many program operations are codependent, meaning they rely on the order in which they are executed, so it is not always possible to change their order without affecting program functionality.
Page 13 of 15

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