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C# Interview Questions & Answers. What is C#? Explain types of comment in C# with examples, All quizzes on Programming  C# Sharp have answers available with pdf.

Here list of  important 30 C# interview questions and answers for C# developers who plan to attend the C# and .NET interviews.

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Question 1: The Execution of the program begins with ________.

(A) main()

(B) get()

(C) class()

(D) display()

Question 2: In c#, ‘using’ is a _________ .

(A) class

(B) directive

(C) function

(D) keyword

Question 3: C# does not support __________ statement.

(A) go

(B) goto

(C) break

(D) continue

Question 4: “new” is used for __________ the objects.

(A) modifying

(B) creating

(C) allocating memory for

(D) deallocate memory of

Question 5: C# supports ______________.

(A) for statement only

(B) for each statement only

(C) both for and for each statements

(D) neither for nor for each statement

Question 6: Which of the following is correct about variable naming conventions in C#?

(A) It should not be a C# keyword.

(B) It must not contain any embedded space or symbol such as? – + ! @ # % ^ & * ( ) [ ] { }

(C) Both of the above.

(D) None of the above.

Question 7: Which of the following converts a type to a byte value in C#?

(A) ToByte

(B) ToChar

(C) ToSingle

(D) ToDateTime

Question 8: Which of the following preprocessor directive allows to create a compound conditional directive, along with #if in C#?

(A) elif

(B) else

(C) define

(D) if

Question 9: The ____ language allows more than one method in a single class.

(A) J#

(B) C#

(C) C++

(D) C

Question 10: In C#, a subroutine is called a _________.

(A) Metadata

(B) Function

(C) Managed code

(D) Method

Question 11: The character pair ?: is a __________ available in C#.

(A) Decision operator

(B) Unary operator

(C) Ternary operator

(D) Functional operator

Question 12: C# all binary operators are ___________.

(A) Left-associative

(B) Top-associative

(C) Right-associative

(D) Center-associative

Question 13: A _____ is any valid C# variable ending with a colon.

(A) Bitwise

(B) goto

(C) Label

(D) Logical

Question 14: C# has _______ operator, useful for making two way decisions.

(A) Looping

(B) Conditional

(C) Functional

(D) Exponential

Question 15: Which property among the following represents the current position of the stream?

(A) long Position

(B) long Length

(C) int Length

(D) All of the mentioned

Question 16: Which keyword is used to refer baseclass constructor to subclass constructor in C#?

(A) static

(B) this

(C) extend

(D) base

Question 17: Which keyword is used for correct implementation of an interface in C#.NET?

(A) intf

(B) interface

(C) init

(D) iostream

Question 18: Select the correct statement about Attributes used in C#.NET?

(A) If a BugFixAttribute is to receive three parameters, then the BugFixAttribute class should implement a zero argument constructor

(B) The CLR can change the behavior of the code depending on attributes applied to it

(C) To create a custom attribute we need to create a custom attribute structure and derive it from System Attribute

(D) None of the above

Question 19: The [serializable()] attributes gets inspected at _________ time.

(A) run time

(B) compile time

(C) linking time

(D) design time

Question 20: Which of the given stream methods provide access to the output console by default in C#.NET?

(A) Console.Out

(B) Console.In

(C) Console.Error

(D) All of the above

Question 21: The number of input methods defined by the stream method Console.In in C#.NET is?

(A) 4

(B) 3

(C) 2

(D) 1

Question 22: The C# provides special methods known as _____  to provide access to data members.

(A) Methods method

(B) Loop method

(C) Accessor method

(D) Functions method

Question 23: Which method used to read byte streams from the file?

(A) Readkey()

(B) Read()

(C) ReadMore()

(D) ReadByte()

Question 24: Select the method used to write single byte to a file?

(A) Wrteline()

(B) Write()

(C) WriteByte()

(D) None

Question 25: Which of these is a method used to clear all the data present in output buffers?

(A) flush()

(B) close()

(C) clear()

(D) fflush()

Question 26: We can create empty structures in C#.NET.

(A) False

(B) True

(C) Maybe

(D) Can’t say

Question 27: Which of the following statements is correct about the using statement used in C#.NET?

(A) It is permitted to define a member at namespace level as a using alias.

(B) using statement can be placed anywhere in the C#.NET source code file.

(C) By using using statement it is possible to create an alias for the namespace but not for the namespace element.

(D) C#.NET source code file can contain any number of using statement.

Question 28: Which of the following can not belong to a C#.NET Namespace?

(A) class

(B) enum

(C) struct

(D) data

Question 29: Choose the symbol which begins a preprocessor directive in C#.NET?

(A) #

(B) **

(C) *

(D) &

Question 30: In which of the following collections is the I/O based on a key?

(A) SortedList

(B) BitArray

(C) Stack

(D) Queue