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 converts arguments to strings automatically.

It forces a method to accept only one argument.

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

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 declaring the argument with the params keyword.

By omitting the argument type.

None

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

They cannot accept more than one argument.

They must be static.

They must always return an integer value.

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

None

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

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

The program will automatically add null values.

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#?

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

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

The argument must be a string.

Arguments are automatically converted to strings.

None

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

Pass no arguments.

Pass exactly two arguments.

Use the ref keyword for all arguments.

Pass a List or array of arguments to the method.

None

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

An exception is thrown.

A default value is returned.

The method returns an integer by default.

Nothing is returned.

None

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

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.

It passes the variable by value.

None

10.

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

There is no difference between ref and out.

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

out requires the method to assign a value to the parameter, whereas ref 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 passes the variable by reference, allowing changes in the method to affect the original variable.

It prevents the variable from being modified inside the method.

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

None

12.

What is a method in C#?

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

A class that defines objects in a C# program.

A loop that runs a specific number of times.

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 must always be null.

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

An argument that can only be used in certain methods.

None

14.

What are named arguments in C#?

Arguments that are always passed by reference.

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

Arguments that are passed in a fixed order.

Arguments that cannot be changed once passed.

None

15.

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

null

string

int

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?

public int Add(int num1, int num2)

void int Add(num1, num2)

int Add()

public void Add(int num1, int num2)

None

18.

What does the void keyword mean in a method declaration?

The method must be private.

The method is public.

The method accepts no parameters.

The method does not return a value.

None

19.

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

public

private

internal

protected

None

20.

What are parameters in C# methods?

The return values from a method.

Variables that are declared outside the method.

Loops that execute inside a method.

Values a method accepts to perform its task.

None

21.

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

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

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

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

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

None

Time’s up

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