C++ Multiple Choice Questions for Practitioners

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Question: 1

Can we typecast void * into int * in C++?

(A) Yes
(B) No
(C) Undefined
(D) Depends on Compiler

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Level: Practitioner

Category of MCQ: datatype in C++

Question: 2

Find the output of below C++ program? #include<iostream>

void Execute(int &x, int y = 200)
{
 int TEMP = x + y;
 x+= TEMP;
 if(y!=200)
     std::cout<<TEMP<<x<<y<<"--";
}

int main()
{
 int A=50, B=20;
 std::cout<<A<<B<<"--";
 Execute(A,B);
 std::cout<<A<<B<<"--";
 return 0;
}

(A) 5020--5020--
(B) 5020--7012020--12020--
(C) 5020--70120200--5020
(D) 5020--7050200--5020--

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Level: Practitioner

Category of MCQ: function in C++

Question: 3

//How many times CppBuzz.com is printed in below C++ program?

#include<iostream>

int main()
{
    int i=0;
    lbl:
    std::cout<<"CppBuzz.com";
    i++;
    if(i<5)
    {
	goto lbl;
    }

    return 0;

}

(A) Error
(B) 5 times
(C) 4 times
(D) 6 times

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Level: Practitioner

Category of MCQ: loops in C++

Question: 4

How to access and edit data in data file handling using structures

(A) read()
(B) write()
(C) both A and B
(D) without read()

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Level: Practitioner

Category of MCQ: operators in C++

Question: 5

Among the operators *, /, and %, which one has the highest precedence?

(A) *
(B) /
(C) %
(D) all have same precedence

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Level: Practitioner

Category of MCQ: operators in C++

Question: 6

What should be the output of below program?

#include<iostream>

int main()
{
    int a = 1;
    switch(a)
    {
    case 1: std::cout<<"One";
    case 2: std::cout<<"Two";
    case 3: std::cout<<"Three";
    default: std::cout<<"Default";
    }
    return 0;

}

(A) One
(B) Compilation Error
(C) Default
(D) OneTwoThreeDefault

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Level: Practitioner

Category of MCQ: conditional in C++

Question: 7

What is abstract class?

(A) A class with abstract keyword
(B) A class with no functions in it
(C) A class with atleast one pure virtual function
(D) Empty Class

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Level: Practitioner

Category of MCQ: polymorphism in C++

Question: 8

What is the size of empty class?

(A) 0
(B) 1
(C) 2
(D) 4

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Level: Practitioner

Category of MCQ: datatype in C++

Question: 9

Can a class contain another class in it ?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: datatype in C++

Question: 10

Can we create our own workspace?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: datatype in C++

Question: 11

When can we have two classes with same name?

(A) We cant have
(B) In different work space
(C) Can have but in different file
(D) We can have in any scenario

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Level: Practitioner

Category of MCQ: datatype in C++

Question: 12

Can we create array of reference?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: other in C++

Question: 13

How to stop Name Mangling in C++?

(A) It is not possible
(B) It is possible only with C code
(C) By using extern "C" keyword
(D) By Converting C++ code to C

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Level: Practitioner

Category of MCQ: function in C++

Question: 14

Can we create object of Abstract class?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: abstract_class in C++

Question: 15

Can we have Constructor in Abstract class?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: loops in C++

Question: 16

Can we create pointer to Abstract class?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: abstract_class in C++

Question: 17

Can we create Nested classes in C++?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: classesAndobjects in C++

Question: 18

What is VTable?

(A) It contains VPTR
(B) It contains address of Virtual function
(C) It cotains address of Object
(D) None of these

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Level: Practitioner

Category of MCQ: vtable in C++

Question: 19

Can this pointer point to another class?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: classesAndobjects in C++

Question: 20

What is dangling pointer?

(A) A pointer pointing to NULL
(B) Pointer pointing to memory location which has been freed
(C) Pointer which is pointing to new location
(D) None of these

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Level: Practitioner

Category of MCQ: pointers in C++

Question: 21

Can we have Virtual Destructor ?

(A) Yes
(B) No

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Level: Practitioner