C# Online Quiz

Q 1 - Which of the following is correct about variable naming conventions in C#?

A - A name must begin with a letter that could be followed by a sequence of letters, digits (0 - 9) or underscore.

B - The first character in an identifier cannot be a digit.

C - Both of the above.

D - None of the above.

Q 2 - Which of the following is correct about reference type variables in C#?

A - The reference types do not contain the actual data stored in a variable.

B - They contain a reference to the variables.

C - Example of built-in reference types are: object, dynamic, and string.

D - All of the above.

Q 3 - Which of the following converts a type to a string in C#?

A - ToInt64

B - ToSbyte

C - ToSingle

D - ToString

Q 4 - Which of the following operator casts without raising an exception if the cast fails in C#?

A - ?:

B - is

C - as

D - *

Q 5 - Which of the following access specifier in C# allows a child class to access the member variables and member functions of its base class?

A - Public

B - Private

C - Protected

D - Internal

Q 6 - Which of the following is correct about nullable types in C#?

A - C# provides a special data types, the nullable types, to which you can assign normal range of values as well as null values.

B - You can assign true, false, or null in a Nullable<bool> variable.

C - You can store any value from -2,147,483,648 to 2,147,483,647 or null in a Nullable<Int32> variable.

D - All of the above.

Q 7 - Which of the following is true about C# structures vs C# classes?

A - Classes are reference types and structs are value types.

B - Structures do not support inheritance.

C - Structures cannot have default constructor

D - All of the above.

Q 8 - The assignment operators cannot be overloaded.

A - true

B - false

Q 9 - Which of the following is the correct about namespaces in C#?

A - A namespace is designed for providing a way to keep one set of names separate from another.

B - The class names declared in one namespace does not conflict with the same class names declared in another.

C - The using keyword states that the program is using the names in the given namespace.

D - All of the above.

Q 10 - Which of the following is true about catch block in C#?

A - A program catches an exception with an exception handler at the place in a program where you want to handle the problem.

B - The catch keyword indicates the catching of an exception.

C - Both of the above.

D - None of the above.