laboursonline – MCQs, Mock Tests | C/C C programming language MCQ Questions Set 5

How many minimum number of functions should be present in a C++ program for its execution?

1. 0
2. 1
3. 2
4. 3

✅ Correct Answer: 2

Which of the following is the default return value of functions in C++?

1. int
2. char
3. float
4. void

✅ Correct Answer: 1

What happens to a function defined inside a class without any complex operations (like looping, a large number of lines, etc)?

1. It becomes a virtual function of the class
2. It becomes a default calling function of the class
3. It becomes an inline function of the class
4. The program gives an error

✅ Correct Answer: 3

What is an inline function?

1. A function that is expanded at each call during execution
2. A function that is called during compile time
3. A function that is not checked for syntax errors
4. A function that is not checked for semantic analysis

✅ Correct Answer: 1

When we define the default values for a function?

1. When a function is defined
2. When a function is declared
3. When the scope of the function is over
4. When a function is called

✅ Correct Answer: 2

Where should default parameters appear in a function prototype?

1. To the rightmost side of the parameter list
2. To the leftmost side of the parameter list
3. Anywhere inside the parameter list
4. Middle of the parameter list

✅ Correct Answer: 1

If an argument from the parameter list of a function is defined constant then ______

1. It can be modified inside the function
2. It cannot be modified inside the function
3. Error occurs
4. Segmentation fault

✅ Correct Answer: 2

Which of the following feature is used in function overloading and function with default argument?

1. Encapsulation
2. Polymorphism
3. Abstraction
4. Modularity

✅ Correct Answer: 2

From which function the execution of a C++ program starts?

1. start() function
2. main() function
3. new() function
4. end() function

✅ Correct Answer: 2

Which of the following is important in a function?

1. Return type
2. Function name
3. Both return type and function name
4. The return type, function name and parameter list

✅ Correct Answer: 3

Which is used to keep the call by reference value as intact?

1. static
2. const
3. absolute
4. virtual

✅ Correct Answer: 2

By default how the value are passed in c++?

1. call by value
2. call by reference
3. call by pointer
4. call by object

✅ Correct Answer: 1

What will happen when we use void in argument passing?

1. It will not return value to its caller
2. It will return value to its caller
3. Maybe or may not be return any value to its caller
4. It will return value with help of object

✅ Correct Answer: 1

Where does the return statement returns the execution of the program?

1. main function
2. caller function
3. same function
4. block function

✅ Correct Answer: 2

When will we use the function overloading?

1. same function name but different number of arguments
2. different function name but same number of arguments
3. same function name but same number of arguments
4. different function name but different number of arguments

✅ Correct Answer: 1

If the user did not supply the value, what value will it take?

1. default value
2. rise an error
3. both default value & rise an error
4. error

✅ Correct Answer: 1

Where can the default parameter be placed by the user?

1. leftmost
2. rightmost
3. both leftmost & rightmost
4. topmost

✅ Correct Answer: 2

Which value will it take when both user and default values are given?

1. user value
2. default value
3. custom value
4. defined value

✅ Correct Answer: 1

What we can’t place followed by the non-default arguments?

1. trailing arguments
2. default arguments
3. both trailing & default arguments
4. leading arguments

✅ Correct Answer: 2

If we start our function call with default arguments means, what will be proceeding arguments?

1. user argument
2. empty arguments
3. default arguments
4. user & empty arguments

✅ Correct Answer: 3

What is the default return type of a function?

1. int
2. void
3. float
4. char

✅ Correct Answer: 2