Olete.in – MCQs, Mock Tests & Government Job Prep | C/C C Multiple Choice Questions Set-2

The statement i++; is equivalent to

1. i = i + I;
2. i = i + 1;
3. i = i - 1;
4. i --;

✅ Correct Answer: 1

In C language, a hexadecimal number is represented by writing

1. x
2. xo
3. ox
4. h

✅ Correct Answer: 2

Which of the following library function below by default aborts the program?

1. Terminate()
2. end()
3. Abort()
4. exit()

✅ Correct Answer: 4

If a member needs to have unique value for all the objects of that same class, declare the member as

1. Global variable outside class
2. Local variable inside constructor
3. Static variable inside class
4. Dynamic variable inside class

✅ Correct Answer: 1

Value of ix+j, if i,j are integer type and ix long type would be

1. integer
2. float
3. long integer
4. double percision

✅ Correct Answer: 2

Which of the following below can perform conversions between pointers to related classes?

1. A. cast_static
2. B. dynamic_cast
3. C.static_cast
4. D.cast_dynamic

✅ Correct Answer: 3

How do we define a constructor?

1. x~() {}
2. B. X() {}~
3. C. X() ~{}
4. ~X() {}

✅ Correct Answer: 3

Vtables

1. creates a static table per class
2. creates a static table per object
3. creates a dynamic table per class
4. creates a dynamic table per object

✅ Correct Answer: 4

When class B is inherited from class A, what is the order in which the constructers of those classes are called

1. Class A first Class B next
2. Class B first Class A next
3. Class B's only as it is the child class
4. Class A's only as it is the parent class

✅ Correct Answer: 1

Which of the following is the most general exception handler that catches exception of any type?

1. catch(std::exception)
2. catch(std::any_exception)
3. catch(…)
4. catch()

✅ Correct Answer: 1

Which of the following is the correct syntax of including a user defined header files in C++?

1. #include <userdefined.h>
2. #include <userdefined>
3. #include “userdefined”
4. #include [userdefined]

✅ Correct Answer: 3

Which of the following is a correct identifier in C++?

1. 7var_name
2. 7VARNAME
3. VAR_1234
4. $var_name

✅ Correct Answer: 3

Which of the following is called address

1. operator?
2. *
3. &
4. %

✅ Correct Answer: 2

Which of the following is used for comments in C++?

1. // comment
2. /* comment */
3. both // comment or /* comment */
4. // comment */

✅ Correct Answer: 3

What are the formal parameters in C++?

1. Parameters with which functions are called
2. Parameters which are used in the definition of the function
3. Variables other than passed parameters in a function
4. Variables that are never used in the function

✅ Correct Answer: 1

What are the formal parameters in C++?

1. Parameters with which functions are called
2. Parameters which are used in the definition of the function
3. Variables other than passed parameters in a function
4. Variables that are never used in the function

✅ Correct Answer: 2

Which function is used to read a single character from the console in C++?

1. cin.get(ch)
2. getline(ch)
3. read(ch)
4. scanf(ch)

✅ Correct Answer: 1

Which function is used to write a single character to console in C++?

1. cout.put(ch)
2. cout.putline(ch)
3. write(ch)
4. printf(ch)

✅ Correct Answer: 1

What are the escape sequences?

1. Set of characters that convey special meaning in a program
2. Set of characters that whose use are avoided in C++ programs
3. Set of characters that are used in the name of the main function of the program
4. Set of characters that are avoided in cout statements

✅ Correct Answer: 1

Which of the following escape sequence represents carriage return?

1. \r
2. \n
3. \n\r
4. \c

✅ Correct Answer: 1

Which of the following escape sequence represents tab?

1. \t
2. \t\r
3. \b
4. \a

✅ Correct Answer: 1

Who created C++?

1. Bjarne Stroustrup
2. Dennis Ritchie
3. Ken Thompson
4. Brian Kernighan

✅ Correct Answer: 1

Which of the following is called insertion/put to operator?

1. <<
2. >>
3. >
4. <

✅ Correct Answer: 1

Which of the following is called extraction/get from operator?

1. <<
2. >>
3. >
4. <

✅ Correct Answer: 2

A language which has the capability to generate new data types are called ___________

1. Extensible
2. Overloaded
3. Encapsulated
4. Reprehensible

✅ Correct Answer: 1

Wrapping data and its related functionality into a single entity is known as _____________

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

✅ Correct Answer: 2

How structures and classes in C++ differ?

1. In Structures, members are public by default whereas, in Classes, they are private by default
2. In Structures, members are private by default whereas, in Classes, they are public by default
3. Structures by default hide every member whereas classes do not
4. Structures cannot have private members whereas classes can have

✅ Correct Answer: 1

What does polymorphism in OOPs mean?

1. Concept of allowing overiding of functions
2. Concept of hiding data
3. Concept of keeping things in differnt modules/files
4. Concept of wrapping things into a single unit

✅ Correct Answer: 1

Which concept allows you to reuse the written code?

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

✅ Correct Answer: 3

Which of the following shows multiple inheritances?

1. A->B->C
2. A->B; A->C
3. A,B->C
4. B->A

✅ Correct Answer: 3

How access specifiers in Class helps in Abstraction?

1. They does not helps in any way
2. They allows us to show only required things to outer world
3. They help in keeping things together
4. Abstraction concept is not used in classes

✅ Correct Answer: 2

C++ is ______________

1. procedural programming language
2. object oriented programming language
3. functional programming language
4. both procedural and object oriented programming language

✅ Correct Answer: 4

What does modularity mean?

1. Hiding part of program
2. Subdividing program into small independent parts
3. Overriding parts of program
4. Wrapping things into single unit

✅ Correct Answer: 2

Which of the following class allows to declare only one object of it?

1. Abstract class
2. Virtual class
3. Singleton class
4. Friend class

✅ Correct Answer: 3

Which of the following is not a type of Constructor?

1. Friend constructor
2. Copy constructor
3. Default constructor
4. Parameterized constructor

✅ Correct Answer: 1

Which of the following is correct?

1. Base class pointer object cannot point to a derived class object
2. Derived class pointer object cannot point to a base class object
3. A derived class cannot have pointer objects
4. A base class cannot have pointer objects

✅ Correct Answer: 2

Out of the following, which is not a member of the class?

1. Static function
2. Friend function
3. Constant function
4. Virtual function

✅ Correct Answer: 2

What is the other name used for functions inside a class?

1. Member variables
2. Member functions
3. Class functions
4. Class variables

✅ Correct Answer: 2

Which of the following cannot be a friend?

1. Function
2. Class
3. Object
4. Operator function

✅ Correct Answer: 3

Why references are different from pointers?

1. A reference cannot be made null
2. A reference cannot be changed once initialized
3. No extra operator is needed for dereferencing of a reference
4. All of the mentioned

✅ Correct Answer: 4

Which of the following provides a programmer with the facility of using object of a class inside other classes?

1. Inheritance
2. Composition
3. Abstraction
4. Encapsulation

✅ Correct Answer: 2

How many types of polymorphism are there in C++?

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

✅ Correct Answer: 2

How run-time polymorphisms are implemented in C++?

1. Using Inheritance
2. Using Virtual functions
3. Using Templates
4. Using Inheritance and Virtual functions

✅ Correct Answer: 4

How compile-time polymorphisms are implemented in C++?

1. Using Inheritance
2. Using Virtual functions
3. Using Templates
4. Using Inheritance and Virtual functions

✅ Correct Answer: 3

Which of the following is an abstract data type?

1. integer
2. float
3. class
4. string

✅ Correct Answer: 3

Which concept means the addition of new components to a program as it runs?

1. Data hiding
2. Dynamic binding
3. Dynamic loading
4. Dynamic typing

✅ Correct Answer: 3

Which of the following explains the overloading of functions?

1. Virtual polymorphism
2. Transient polymorphism
3. Ad-hoc polymorphism
4. Pseudo polymorphism

✅ Correct Answer: 3

Which of the following approach is used by C++?

1. Top-down
2. Bottom-up
3. Left-right
4. Right-left

✅ Correct Answer: 2

Which operator is overloaded for a cout object?

1. >>
2. <<
3. <
4. >

✅ Correct Answer: 2

Which of the following cannot be used with the virtual keyword?

1. Class
2. Member functions
3. Constructors
4. Destructors

✅ Correct Answer: 2

Which concept is used to implement late binding?

1. Virtual functions
2. Operator functions
3. Constant functions
4. Static functions

✅ Correct Answer: 1

Which of the following is correct?

1. C++ allows static type checking
2. C++ allows dynamic type checking.
3. C++ allows static member function to be of type const.
4. C++ allows both static and dynamic type checking

✅ Correct Answer: 4

Which of the following supports the concept that reusability is a desirable feature of a language?

1. It reduces the testing time
2. It reduces maintenance cost
3. It decreases the compilation time
4. It reduced both testing and maintenance time

✅ Correct Answer: 4

Which of the following is a static polymorphism mechanism?

1. Function overloading
2. Operator overloading
3. Templates
4. All of the mentioned

✅ Correct Answer: 4

Which of the following is true? I) All operators in C++ can be overloaded. II) The basic meaning of an operator can be changed.

1. I only
2. II only
3. Both I and II
4. Neither I nor II

✅ Correct Answer: 4

Which of the following is not a type of inheritance?

1. Multiple
2. Multilevel
3. Distributive
4. Hierarchical

✅ Correct Answer: 3

What happens if a class does not have a name?

1. It will not have a constructor
2. It will not have a destructor
3. It is not allowed
4. It will neither have a constructor or destructor

✅ Correct Answer: 2

Which of the following statement is true? I) In Procedural programming languages, all function calls are resolved at compile-time II) In Object Oriented programming languages, all function calls are resolved at compile-time

1. I only
2. II only
3. Both I and II
4. Neither I nor II

✅ Correct Answer: 1

Which members are inherited but are not accessible in any case?

1. Private
2. Public
3. Protected
4. Both private and protected

✅ Correct Answer: 1

Which of the following is correct?

1. Friend functions can access public members of a class
2. Friend functions can access protected members of a class
3. Friend functions can access private members of a class
4. All of the mentioned

✅ Correct Answer: 4