R4RIN – MCQs, Mock Tests | C/C C Programming MCQS Set-4

To use external linkage we have to use which keyword?

1. static
2. extern
3. const
4. argc

✅ Correct Answer: 2

Which is used to use a function from one source file to another?

1. code
2. declaration
3. prototype
4. variable

✅ Correct Answer: 3

What is the use of no linkage?

1. make the entity visible to other programs
2. make the entity visible to other blocks in the same program
3. make the entity visible only to that block
4. make the entity invisible

✅ Correct Answer: 3

What is the user-defined header file extension in c++?

1. cpp
2. h
3. hf
4. hg

✅ Correct Answer: 2

Which of the following keyword is used to declare the header file?

1. include
2. exclude
3. string
4. namespace

✅ Correct Answer: 1

Identify the incorrect statement.

1. iostream is a standard header and iostream.h is a non-standard header
2. iostream is a non-standard header and iostream.h is a non-standard header
3. iostream is a standard header and iostream.h is a standard header
4. iostream is a non-standard header

✅ Correct Answer: 1

What does a default header file contain?

1. prototype
2. implementation
3. declarations
4. pointing

✅ Correct Answer: 3

setprecision requires which of the following header file?

1. stdlib.h
2. iomanip.h
3. console.h
4. conio.h

✅ Correct Answer: 2

Which of the following header file does not exist?

1. <iostream>
2. <string>
3. <sstring>
4. <sstream>

✅ Correct Answer: 3

Which of the header file must be included to use stringstream?

1. <iostream>
2. <string>
3. <sstring>
4. <sstream>

✅ Correct Answer: 2

Which of the following header files is required for creating and reading data files?

1. ofstream.h
2. fstream.h
3. ifstream.h
4. console.h

✅ Correct Answer: 2

What does a class in C++ holds?

1. data
2. functions
3. both data & functions
4. arrays

✅ Correct Answer: 3

Which is used to define the member of a class externally?

1. :
2. ::
3. #
4. !!$

✅ Correct Answer: 2

Which other keywords are also used to declare the class other than class?

1. struct
2. union
3. object
4. both struct & union

✅ Correct Answer: 4

Which of the following is a valid class declaration?

1. class A { int x; };
2. class B { }
3. public class A { }
4. object A { int x; };

✅ Correct Answer: 1

The data members and functions of a class in C++ are by default _______

1. protected
2. private
3. public
4. public & protected

✅ Correct Answer: 2

Constructors are used to ___________

1. initialize the objects
2. construct the data members
3. both initialize the objects & construct the data members
4. delete the objects

✅ Correct Answer: 1

When struct is used instead of the keyword class means what will happen in the program?

1. access is public by default
2. access is private by default
3. access is protected by default
4. access is denied

✅ Correct Answer: 1

Which category of data type a class belongs to?

1. Fundamental data type
2. Derived data type
3. User defined derived data type
4. Atomic data type

✅ Correct Answer: 3

How the objects are self-referenced in a member function of that class.

1. Using a special keyword object
2. Using this pointer
3. Using * with the name of that object
4. By passing self as a parameter in the member function

✅ Correct Answer: 2

What does a mutable member of a class mean?

1. A member that can never be changed
2. A member that can be updated only if it not a member of constant object
3. A member that can be updated even if it a member of constant object
4. A member that is global throughout the class

✅ Correct Answer: 3

Which keyword is used to define the user defined data types?

1. def
2. union
3. typedef
4. type

✅ Correct Answer: 3

Where does the object is created?

1. class
2. constructor
3. destructor
4. attributes

✅ Correct Answer: 1

How to access the object in the class?

1. scope resolution operator
2. ternary operator
3. direct member access operator
4. resolution operator

✅ Correct Answer: 3

Which of these following members are not accessed by using direct member access operator?

1. public
2. private
3. protected
4. both private & protected

✅ Correct Answer: 4

Pick out the other definition of objects.

1. member of the class
2. associate of the class
3. attribute of the class
4. instance of the class

✅ Correct Answer: 4

How many objects can present in a single class?

1. 1
2. 2
3. 3
4. as many as possible

✅ Correct Answer: 4

Which special character is used to mark the end of class?

1. ;
2. :
3. #
4. $

✅ Correct Answer: 1

Pick the other name of operator function.

1. function overloading
2. operator overloading
3. member overloading
4. object overloading

✅ Correct Answer: 2

Which of the following operators can’t be overloaded?

1. ::
2. +
3. –
4. []

✅ Correct Answer: 1

How to declare operator function?

1. operator sign
2. operator
3. name of the operator
4. name of the class

✅ Correct Answer: 1

Which of the following statements is NOT valid about operator overloading?

1. Only existing operators can be overloaded
2. The overloaded operator must have at least one operand of its class type
3. The overloaded operators follow the syntax rules of the original operator
4. None of the mentioned

✅ Correct Answer: 2

Operator overloading is ___________

1. making c++ operator works with objects
2. giving new meaning to existing operator
3. making the new operator
4. adding operation to the existing operators

✅ Correct Answer: 4

What is operator overloading in C++?

1. Overriding the operator meaning by the user defined meaning for user defined data type
2. Redefining the way operator works for user defined types
3. Ability to provide the operators with some special meaning for user defined data type
4. All of the mentioned

✅ Correct Answer: 4

What is the syntax of overloading operator + for class A?

1. A operator+(argument_list){}
2. A operator[+](argument_list){}
3. int +(argument_list){}
4. int [+](argument_list){}

✅ Correct Answer: 1

How many approaches are used for operator overloading?

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

✅ Correct Answer: 3

Which of the following operator cannot be overloaded?

1. +
2. ?:
3. –
4. %

✅ Correct Answer: 2

Which of the following operator can be overloaded?

1. ?:
2. ::
3. .
4. ==

✅ Correct Answer: 4

Which of the following operator cannot be used to overload when that function is declared as friend function?

1. -=
2. ||
3. ==
4. []

✅ Correct Answer: 4

Choose the operator which cannot be overloaded.

1. /
2. ()
3. ::
4. %

✅ Correct Answer: 3

In which direction does the assignment operation will take place?

1. left to right
2. right to left
3. top to bottom
4. bottom to top

✅ Correct Answer: 2

Pick out the compound assignment statement.

1. a = a – 5
2. a = a / b
3. a -= 5
4. a = a + 5

✅ Correct Answer: 3

What is the associativity of add(+);?

1. right to left
2. left to right
3. right to left & left to right
4. top to bottom

✅ Correct Answer: 2

What is the name of | operator?

1. sizeof
2. or
3. and
4. modulus

✅ Correct Answer: 2

Which operator is having the highest precedence in c++?

1. array subscript
2. Scope resolution operator
3. static_cast
4. dynamic_cast

✅ Correct Answer: 2

subscript operator is used to access which elements?

1. string
2. char
3. array
4. float

✅ Correct Answer: 3

How many arguments will the subscript operator will take for overloading?

1. 1
2. 2
3. 3
4. as many as possible

✅ Correct Answer: 1

Pick out the correct statement.

1. subscript operator has a higher precedence than the assignment operator
2. subscript operator has a lower precedence than the assignment operator
3. subscript operator is used with string elements
4. subscript operator is used with char elements

✅ Correct Answer: 1

What do we need to do to pointer for overloading the subscript operator?

1. reference pointer
2. dereference pointer
3. store it in heap
4. memory locator

✅ Correct Answer: 2

What do we need to use when we have multiple subscripts?

1. operator()
2. operator[]
3. operator
4. operator<>

✅ Correct Answer: 2

What is the use of function call operator?

1. overloading the methods
2. overloading the objects
3. overloading the parameters
4. overloading the string

✅ Correct Answer: 2

Pick out the correct statement.

1. virtual functions does not give the ability to write a templated function
2. virtual functions does not give the ability to rewrite a templated function
3. virtual functions does give the ability to write a templated function
4. virtual functions does not give the ability to rewrite a simple function

✅ Correct Answer: 1