Best C Sharp Interview Questions and Answers 2025 2025 | Top C# Interview Questions and Answers MCQ Type
| Quiz Name | C Sharp Interview Questions and Answers |
| Category | Reasoning |
| Number of Questions | 30 |
| Time | 30 Minutes |
| Exam Type | MCQ (Multiple Choice Questions) |
1. What is the proper name for a method that has the same name as a class and is used to destroy objects?
a. Builder
b. Complete ()
c. Destructor
d. the conclusion
2. The methods with the same name but differing parameter lists and definitions are referred to as_______.
a. Method Overriding
b. Method Overloading
c. Method Overreading
d. Method Overwriting
3. Which function of the character stream class returns the number of characters successfully read beginning at count?
a. int ReadBlock (char[ ] buffer, int index, int count)
b. int Read (char[] buffer, int index, int count)
c. int Read ()
d. none of the preceding
4. In C#, a structure is a unique manner of putting together data of Various types.
a. Invoking
b. The same as before
c. Unique
d. Calling
5. Which of the following statements concerning an enum in C#.NET is correct?
a. An enum variable can be defined within a class or a namespace.
b. An enum variable cannot have a private access modifier.
c. An enum variable cannot have a public access modifier.
d. An implicit cast is required to transition from an enum type to an integral type.
6. The process of defining a method in terms of itself, that is, a method that calls itself, is?
a. Polymorphism is a type of genetic variation.
b. recursion
c. Encapsulation is a term used to describe the process of enclosing something
d. abstraction
7. Which of the following phrases accurately differentiates between ‘=’ and ‘==’ in C#?
a. The ‘==’ operator is used to allocate values from one variable to another.
The ‘=’ operator is used to compare two variables’ values.
b. The ‘=’ operator is used to assign values from one variable to another.
The ‘==’ operator is used to compare two variables’ values.
c. There is no distinction between the two operators.
d. none of the preceding
8. Boxing converts a value type on the stack to a on the heap.
a. Bool type
b. Instance type
c. Type of class
d. Object type
9. Select the file mode method to generate a new output file with the condition that a file with the same name does not exist.
a. FileMode.CreateNew
b. FileMode.Create
c. FileMode.OpenOrCreate
d. FileMode.Truncate
10. “Obtains a Module object that represents the module (an executable file) in which the reflected type lives,” the property says. Select the property that corresponds to the following statement:
a. Module
b. Defining the Type
c. MetadataToken (int)
d. Type ReflectedType is a type that is reflected in another type.
11. ________causes the loop to continue with the following iteration after skipping any statements in between.
a. Loop
b. Exit
c. Pause
d. Continue
12. Which of the following is the correct way of defining the function fun() if it is to receive an int, a single, and a double and return a decimal?
a. decimal static fun(int I Single j, Double k)
b. decimal fun(int I Single j, Double k)
c. static decimal fun(int I Single j, Double k)
d. static decimal fun(int I Single j, Double k) decimal…
13. Which of the following statements concerning static member variables of a class is true?
a. We can make class member variables static by using the static keyword.
b. When we mark a class member as static, it means that no matter how many objects of the class are generated, there is only one copy of the static member.
c. Both of the aforementioned.
d. None of the above
14.To lock or unlock an object, use the—–
a. techniques for locking and unlocking
b. Methods of entry and exit
c. close and open methods
d. close and allow ways
15.Which of the following can be used to externally define a member of a class?
a. :
b. ::
c. #
d. none of the above
16. A single class in the language can have several methods.
a. J#
b. C#
c. C++ is an abbreviation for Computer Programming Language.
d. C.
17. What class may be used to create new kinds at runtime?
a. System
b. System.Object
c. System.NewClass
d. System.Reflection.Emit.
18.In C#, select the incorrect statement about the ref’ keyword.br />
a. When’ref’ is used, all changes made to parameters in method will be reflected in variable when control is transferred back to calling method.
b.The’ref’ keyword causes arguments to be provided by reference.
c. References can be accessed recursively.
d. All of the foregoing
19. Which of the following CANNOT occur several times in a programme?
a. namespace
b. Points of Entry
c. Classification
d. Function
20. An is a symbol that instructs a computer to perform particular mathematical or logical operations.
a. Operator
b. Expression
c. Condition
d. Logic
21. In C#, which of the following operators denotes a conditional operation?
a. *
b. as
c. :
d. is
22. Which of the following is the correct method to define a struct abc variable?
struct abc; public string name; protected internal int age; private Single sal;
a. abc e = new abc();
b. abc();
c. abc e; e = new abc;
d. abc e = new abc;
23. Which of the following assertions is true?
a. A struct never declares a default function Object() { [native code] }.
b. In C#, all value types necessarily come from ValueType, which derives from Object.
c. A struct never declares a default destructor.
d. In C#, classes and structs are semantically equivalent.
24. A is a storage location identification—-
a. Constant
b. Type of reference
c. Variable
d. Object
25. What is the proper approach to apply an attribute to an Assembly?
a. AssemblyInfo: AssemblyDescription (“Csharp”)
b. assembly: AssemblyDescription(“Csharp”)
c. AssemblyDescription(“Csharp”)
d. Assembly:AssemblyDescription(“Csharp”)
26. Locate a function Object() { [native code] } that has been properly initialised.
a. obj 1new obj();
b. obj 1=new obj;
c. obj 1=new object ();
d. All of these are correct methods.
27. In C#, which of the following methods transforms a type to a byte value?
a. To Single
b. ToDateTime
c. ToChar
d. ToByte
28. Which of the following gives the correct number of constructors that a class can define?
a. 1
b. 2
c. Any number
d. None of the above
29. SOAP stands for .—–
a. SOAP (Simple Object Access Protocol)
b. SOAP (Simple Object Application Protocol)
c. Simple Object Account Protocol
d. Simple Object Access Program
30.Which of the following statements is correct?
1.A struct can have properties.
2.Constructors can be found in structs.
3.A struct can have protected data members.
4.A struct cannot have methods.
5.Constants are not allowed in structs.
a. 1, 2
b. 3, 4
c. 1, 2, 4
d. 3, 5
