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Welcome to the Reversing .NET MCQs Page

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

Reversing .NET MCQs | Page 8 of 14

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Q71.
What is the purpose of newarr instruction in IL?

a.

To allocate memory for an array.

b.

To create a new object reference.

c.

To perform conditional branching.

d.

To convert a value type to an object reference.

Discuss
Answer: (a).To allocate memory for an array. Explanation:The newarr instruction in IL is used to allocate a one-dimensional array of the specified type and creates a zero-based, one-dimensional array.
Q72.
Which instruction is used to create a new object reference and push the resulting reference into the evaluation stack in IL?

a.

newarr

b.

call

c.

ret

d.

newobj

Discuss
Answer: (d).newobj Explanation:The newobj instruction in IL is used to allocate an instance of the specified object type and push the resulting reference (essentially a pointer) into the evaluation stack.
Q73.
What is the purpose of switch instruction in IL?

a.

To perform arithmetic operations on values.

b.

To allocate memory for an array.

c.

To perform table switch on a value.

d.

To perform conditional branching.

Discuss
Answer: (c).To perform table switch on a value. Explanation:The switch instruction in IL is used to perform a table switch on a value. It takes an int32 describing how many case blocks are present, followed by a list of relative addresses pointing to the various case blocks. The value that the case block values are compared against is popped from the top of the stack.
Q74.
Which instruction is used to convert a value type to an object reference that contains type identification information in IL?

a.

box

b.

unbox

c.

call

d.

newarr

Discuss
Answer: (a).box Explanation:The box instruction in IL is used to convert a value type to an object reference that contains type identification information. It essentially constructs an object of the specified type that contains a copy of the value type that was passed through the evaluation stack.
Q75.
What is the purpose of unbox instruction in IL?

a.

To allocate memory for an array.

b.

To convert a value type to an object reference.

c.

To perform arithmetic operations on values.

d.

To convert a boxed value type to its raw form.

Discuss
Answer: (d).To convert a boxed value type to its raw form. Explanation:The unbox instruction in IL is used to convert a boxed value type to its raw form. It destroys the object and copies its contents back to a value type.
Q76.
What is IL code?

a.

High-level language code

b.

Native assembly language

c.

Obfuscated code

d.

Machine code

Discuss
Answer: (a).High-level language code Explanation:IL code is a high-level language code used in the .NET framework.
Q77.
Why is reversing IL code easier than reversing IA-32?

a.

There are less redundant details in IL code

b.

There are more relevant details in IL code

c.

IL code contains accurate data type information

d.

All of the above

Discuss
Answer: (d).All of the above Explanation:IL code contains less redundant details such as flags and registers and more relevant details such as class definitions and accurate data type information.
Q78.
Is there a need to read raw IL code?

a.

Yes, when a program is obfuscated and cannot be properly decompiled

b.

No, decompilers can produce a high-level language representation of the code

c.

Yes, to examine redundant details such as flags and registers

d.

Both a and c

Discuss
Answer: (d).Both a and c Explanation:Raw IL code may need to be examined when a program is obfuscated and cannot be properly decompiled or to examine redundant details such as flags and registers.
Q79.
Why is there rarely a reason to read raw IL code?

a.

Because decompilers can produce a high-level language representation of the code

b.

Because IL code contains irrelevant details such as flags and registers

c.

Because IL code is always obfuscated

d.

Because IL code is difficult to read

Discuss
Answer: (a).Because decompilers can produce a high-level language representation of the code Explanation:There is rarely a need to read raw IL code because decompilers can produce a high-level language representation of the code.
Q80.
What makes reversing IL code easier than reversing native assembly language such as IA-32?

a.

There are fewer redundant details such as flags and registers

b.

There is more relevant information such as class definitions and accurate data type information

c.

Both a and b

d.

None of the above

Discuss
Answer: (c).Both a and b Explanation:Reversing IL code is easier than reversing native assembly language because there are fewer redundant details such as flags and registers, and more relevant information such as class definitions and accurate data type information.
Page 8 of 14

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