Quiz-1

Question 1

Time: 00:00:00
What will be the output of the following program?

#include <bits/stdc++.h>

using namespace std;

class A{

	int a;

public:

	A(int i){

		a = i;

	}

	void assign(int i){

		a = i;

	}

	int return_value(){

		return a;

	}

};

int main(int argc, char const *argv[])

{

	A obj;

	obj.assign(5);

	cout<<obj.return_value();

}

5

5

55

55

Error

Error

Segmentation fault

Segmentation fault

Garbage value

Garbage value

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Question 2

Time: 00:00:00
What will be the output of the following program?
#include <iostream>

#include <string>

using namespace std;

class A{

int a;

public:

A(){

cout<<"A's constructor called";

}

};

class B{

static A a;

public:

B(){

cout<<"B's constructor called";

}

static A get(){

return a;

}

};

A B::a;

int main(int argc, char const *argv[])

{

B b;

A a1 = b.get();

A a2 = b.get();

A a3 = b.get();

}

3

3

2

2

4

4

1

1

None of these

None of these

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Question 3

Time: 00:00:00
How many parameters does a default constructor require?

1

1

2

2

Zero(0)

Zero(0)

4

4

None of the mentioned

None of the mentioned

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Question 4

Time: 00:00:00
What happens if a user forgets to define a constructor inside a class?

Error occurs

Error occurs

Segmentation fault

Segmentation fault

Objects are not created properly

Objects are not created properly

Compiler provides a default constructor to avoid faults/errors

Compiler provides a default constructor to avoid faults/errors

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Question 5

Time: 00:00:00
How many types of constructors are there in C++?

1

1

4

4

2

2

3

3

None of the mentioned

None of the mentioned

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Question 6

Time: 00:00:00
Which operator a pointer object of a class uses to access its data members and member functions?

->

->

:

:

.

.

::

::

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Question 7

Time: 00:00:00
Which of the following statements about virtual base classes is correct?

It is used to provide multiple inheritances.

It is used to provide multiple inheritances.

It is used to avoid multiple copies of the base class in derived class.

It is used to avoid multiple copies of the base class in derived class.

It is used to allow multiple copies of the base class in a derived class.

It is used to allow multiple copies of the base class in a derived class.

It allows private members of the base class to be inherited in the derived class.

It allows private members of the base class to be inherited in the derived class.

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Question 8

Time: 00:00:00
A __________ is a constructor that either has no parameters or if it has parameters, all the parameters have default values.

copy constructor

copy constructor

default constructor

default constructor

Both A and B

Both A and B

None of these

None of these

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Question 9

Time: 00:00:00
Which of the following statement is correct?

A destructor has the same name as the class in which it is present.

A destructor has the same name as the class in which it is present.

A destructor has a different name than the class in which it is present.

A destructor has a different name than the class in which it is present.

A destructor always returns an integer.

A destructor always returns an integer.

A destructor can be overloaded.

A destructor can be overloaded.

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Question 10

Time: 00:00:00
What happens when a class with parameterized constructors and having no default constructor is used in a program and we create an object that needs a zero-argument constructor?

Compile-time error.

Compile-time error.

Preprocessing error.

Preprocessing error.

Runtime error.

Runtime error.

Runtime exception.

Runtime exception.

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August 26, 2019