Shorthand for Nullable , an int that can also hold null

An int that cannot be changed after assignment

A reference type that wraps an int on the heap

An int whose value is chosen at random

C# MCQs with Answers | C Sharp and .NET Questions – Page 5

Question 81 C#

What is the C# compiler’s direct output when it compiles source code into an assembly?

Correct answer C. Common Intermediate Language (CIL) plus metadata

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Question 82 C#

What is the role of the JIT compiler in .NET?

Correct answer D. It converts CIL into native machine code when methods are first called at run time

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Question 83 C#

What is meant by ‘managed code’ in .NET?

Correct answer C. Code whose execution is controlled by the .NET runtime, which handles memory and safety services

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Question 84 C#

In .NET, what is an assembly?

Correct answer A. A compiled unit of deployment and versioning, such as a .dll or .exe, containing CIL and a manifest

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Question 85 C#

What does the .NET Base Class Library (BCL) provide?

Correct answer D. Core types such as System.String, collections, file I/O and threading used by all .NET programs

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Question 86 C#

When does the .NET garbage collector reclaim the memory of an object?

Correct answer D. When the object is no longer reachable from any root, at a time chosen by the runtime

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Question 87 C#

Which generation of the .NET garbage collector holds newly allocated small objects?

Correct answer A. Generation 0

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Question 88 C#

By default, objects of what size are allocated on the .NET large object heap (LOH)?

Correct answer D. 85,000 bytes or larger

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Question 89 C#

Which of the following C# types is a reference type?

Correct answer C. string

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Question 90 C#

How many bytes does a value of the C# type long occupy?

Correct answer A. 8

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Question 91 C#

What does Console.WriteLine(sizeof(char)); print in C#?

Correct answer B. 2

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Question 92 C#

Which suffix must be added to the literal 9.99 to assign it to a decimal variable in C#?

Correct answer C. m

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Question 93 C#

What does Console.WriteLine(0.1 + 0.2 == 0.3); print in C#?

Correct answer A. False

Open question

Question 94 C#

What is int? in C#?

Correct answer B. Shorthand for Nullable<int>, an int that can also hold null

Open question

Question 95 C#

In .NET, what does the Common Language Runtime (CLR) mainly provide?

Correct answer C. A managed execution environment with memory management, type safety and exception handling

Open question