C++ Multiple Choice Questions for Practitioners

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Question: 51

Can a parameter be both const and volatile?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: keyword in C++

Question: 52

What is/are true statements are const volatile variables?

(A) It is volatile because it can change at any time
(B) It is const because our C program must not try to modify it
(C) Change value outside by means outside our C program
(D) All of these

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Level: Practitioner

Category of MCQ: keyword in C++

Question: 53

What is the advantage of local variable?

(A) It saves memory
(B) It releases memory once it go out of scope
(C) It inrease execution time of program
(D) None of these

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Level: Practitioner

Category of MCQ: other in C++

Question: 54

Which one of these is invalide file mode?

(A) ios::trunc
(B) ios::ate
(C) ios::app
(D) ios::tellg

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Level: Practitioner

Category of MCQ: other in C++

Question: 55

Find the output of below program
#include<iostream>
using namespace std;
enum color{
	Black,
	blue,
	red	
};
int main()
{
    color obj = blue;
    cout<<obj;
    return 0;
}

(A) blue
(B) 2
(C) 1
(D) None of these

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Level: Practitioner

Category of MCQ: enum in C++

Question: 56

#include<iostream>

enum color{
	black=1,
	blue,
	red	
};
int main()
{
    color obj = blue;
    std::cout<<obj;
	return 0;
}

(A) blue
(B) Compilation Error
(C) 1
(D) 2

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Level: Practitioner

Category of MCQ: enum in C++

Question: 57

#include<iostream>
using namespace std;
enum color{
	black=1,
	blue,
	red	
};
int main()
{
    color obj = yellow;
    cout<<obj;
    return 0;
}

(A) yellow
(B) black
(C) Compilation Error
(D) 3

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Level: Practitioner

Category of MCQ: enum in C++

Question: 58

#include<iostream>
using namespace std;
enum color{
	black,
	blue,
	red	
};
int main()
{
    color obj;
    cout<<obj;
    return 0;
}

(A) black
(B) 0
(C) -1
(D) Some Garbage Value

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Level: Practitioner

Category of MCQ: enum in C++

Question: 59

What should be the output of below program? Please note all programs are compiled on GCC compiler.
#include<iostream>
using namespace std;
enum color{
	black,
	blue,
	red	
};
int main()
{    
    color obj;
    cout<<sizeof(obj);
    return 0;
}

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

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Level: Practitioner

Category of MCQ: enum in C++

Question: 60

#include<iostream>

enum color{
	black=-5,
	blue,
	red	
};
int main()
{    
    color obj = blue;
    std::cout<<obj;
    return 0;
}

(A) Compilation Error
(B) 0
(C) 1
(D) -4

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Level: Practitioner

Category of MCQ: enum in C++

Question: 61

How many elements we can have in any structure?

(A) 128
(B) 256
(C) 1024
(D) None of the above

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Level: Practitioner

Category of MCQ: structure in C++

Question: 62

In place of structure which other data type can be used in programming?

(A) int
(B) float
(C) class
(D) enum

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Level: Practitioner

Category of MCQ: structure in C++

Question: 63

Can we declare structure inside structure?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: structure in C++

Question: 64

Can we typedef in declaring structure?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: structure in C++

Question: 65

Which operator is used to access the namespace?

(A) :?
(B) ::
(C) ->
(D) .

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Level: Practitioner

Category of MCQ: namespace in C++

Question: 66

What is the correct syntax to access any variable of Namespace?

(A) namespace::a
(B) namesspace.a
(C) namespace->a
(D) namespace:a

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Level: Practitioner

Category of MCQ: namespace in C++

Question: 67

Which mode of the following will append the file if it already exist in C++?

(A) ios :: out
(B) ios :: app
(C) ios :: in
(D) ios::end

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Level: Practitioner

Category of MCQ: filehandling in C++

Question: 68

Why seekg() is used in file handling of C++

(A) Moves get pointer (input) to a specified location
(B) Moves put pointer (output) to a specified location
(C) Gives the current position of the get pointer
(D) Gives the current position of the put pointer

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Level: Practitioner

Category of MCQ: filehandling in C++

Question: 69

Why use seekp() in file handling of C++?

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Level: Practitioner

Category of MCQ: filehandling in C++

Question: 70

What is the roll of tellg() in C++ file handling?

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Level: Practitioner

Category of MCQ: loops in C++

Question: 71

What is the role of tellp() in C++ file handling?

(A) Gives the current position of the put pointer
(B) Gives the current position of the get pointer
(C) Moves put pointer (output) to a specified location
(D) Moves get pointer (input) to a specified location

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Level: Practitioner

Category of MCQ: filehandling in C++

Question: 72

Which of the following is not a C++ Library?

(A) QT
(B) SDL
(C) WxWidget
(D) Bootstrap

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Level: Practitioner

Category of MCQ: other in C++

Question: 73

#include<iostream>
using namespace std;

int main()
{
 int x = 9;
 while (x>0)
 x--;
 cout<<x;

return 0;
}

(A) 9876543210
(B) 987654321
(C) 9
(D) 0

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Level: Practitioner

Category of MCQ: loops in C++

Question: 74

//How many times will A be printed ?

class A
{

public:
    ~A(){
    std::cout <<"A";
    }
};
int main()
{
    A obj;
    obj.~A();
}

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

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Level: Practitioner

Category of MCQ: classesAndobjects in C++

Question: 75

What is the correct way to initialize vector in C++?

(A) std::vector<integer> vecOfInts;
(B) std::vector int <vecOfInts>
(C) std::vector(int) vecOfInts;
(D) std::vector<int> vecOfInts;

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Level: Practitioner

Category of MCQ: stl in C++

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