C# Methods Quiz

Welcome to the C# Methods Quiz! This quiz will test your knowledge of methods in C#, covering key concepts such as method declaration, calling methods, passing arguments, return types, and using keywords like ref, out, in, params, and more. You’ll also explore optional arguments and named arguments, which enhance the flexibility of methods in C#. Use this quiz to strengthen your understanding of methods, a crucial aspect of writing efficient and organized C# code.

What is the params keyword used for in C# methods?

It allows a method to accept a variable number of arguments.

It converts arguments to strings automatically.

It forces a method to accept only one argument.

It ensures that a method can only accept integer values.

None

How do you declare an optional argument in a method?

By using the out keyword.

By providing a default value for the argument in the method signature.

By omitting the argument type.

By declaring the argument with the params keyword.

None

Which of the following is true about methods with optional arguments in C#?

They must be static.

They must always return an integer value.

They allow arguments to be omitted if default values are provided.

They cannot accept more than one argument.

None

What happens if you call a method without providing all the required arguments?

The program will automatically add null values.

The program will fail to compile unless the missing arguments are optional.

The method will skip the missing arguments and use the provided ones.

The method will assign default values to the missing arguments.

None

What happens if you pass arguments to a method without using named arguments in C#?

The arguments must be passed in the exact order specified by the method parameters.

The method will throw an error.

The arguments are automatically converted to strings.

The arguments can be passed in any order.

None

Which of the following is true about passing arguments by reference in C#?

The argument’s value cannot be changed within the method.

Arguments are automatically converted to strings.

The argument must be a string.

Changes made to the argument within the method are reflected in the original variable.

None

How do you call a method that requires a variable number of parameters using the params keyword?

Pass exactly two arguments.

Pass a List or array of arguments to the method.

Pass no arguments.

Use the ref keyword for all arguments.

None

What is returned when a method has a return type of void?

The method returns an integer by default.

A default value is returned.

Nothing is returned.

An exception is thrown.

None

What does the in keyword do when used with a method parameter?

It passes the variable by value.

It passes the variable by reference but prevents it from being modified within the method.

It allows the method to only return integer values.

It ensures that the parameter is always optional.

None

10.

What is the difference between ref and out parameters in C#?

There is no difference between ref and out.

out requires the method to assign a value to the parameter, whereas ref does not.

ref requires the method to assign a value to the parameter, whereas out does not.

out can only be used with integer parameters, while ref works with any type.

None

11.

What does the ref keyword do when used in a method parameter?

It makes the method private.

It prevents the variable from being modified inside the method.

It converts the variable to a string before passing it to the method.

It passes the variable by reference, allowing changes in the method to affect the original variable.

None

12.

What is a method in C#?

A class that defines objects in a C# program.

A loop that runs a specific number of times.

A named block of code that performs a specific task and can be called by other code.

A variable that holds data in a program.

None

13.

What is an optional argument in C#?

An argument that cannot be passed to private methods.

An argument that can only be used in certain methods.

An argument that must always be null.

A method parameter that has a default value if no argument is provided.

None

14.

What are named arguments in C#?

Arguments passed to a method using the parameter names specified in the method signature.

Arguments that cannot be changed once passed.

Arguments that are always passed by reference.

Arguments that are passed in a fixed order.

None

15.

What is the return type of a method that does not return any value?

int

null

string

void

None

16.

How do you call a method in C# using dot notation?

()

.()

None

17.

What is the correct syntax to declare a method that returns an integer and accepts two integer parameters?

void int Add(num1, num2)

public void Add(int num1, int num2)

int Add()

public int Add(int num1, int num2)

None

18.

What does the void keyword mean in a method declaration?

The method accepts no parameters.

The method is public.

The method does not return a value.

The method must be private.

None

19.

Which access modifier allows a method to be accessed from anywhere in the code?

public

protected

private

internal

None

20.

What are parameters in C# methods?

Loops that execute inside a method.

The return values from a method.

Variables that are declared outside the method.

Values a method accepts to perform its task.

None

21.

What is the difference between methods and functions in C#?

There is no difference; methods and functions are the same in C#.

Functions can only return strings, while methods can return any data type.

Methods are declared inside classes, while functions are declared outside of classes.

Methods are only used for arithmetic operations, while functions are used for logic.

None

Time’s up

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