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MCQs on Object Oriented C++ Programming

MCQs on Object Oriented C++ Programming
MCQ related to Object Oriented programming using C++ for general use and also for job preparation of Public Service Commission
Option image

Q No.1 of 10

cout stand for

Option 1

Class output

Option 2

Character output

Option 3

Common output

Option 4

Call output

Q No.2 of 10

Reference is not same as pointer because

Option 1

a reference can never be null

Option 2

a reference once established cannot be changed.

Option 3

reference does not need an explicit dereferencing mechanism

Option 4

All of these

Q No.3 of 10

It a piece of code can be implemented as a macro or as an inline function. Which of the following factors favour implementation as an inline function?

Option 1

Flexibility to manipulate as a pointer

Option 2

Interacting with other components (like variables in an expression) in the correct way.

Option 3

None of these

Option 4

All of these

Q No.4 of 10

The fields in a structure of a C program are by default

Option 1

protected

Option 2

public

Option 3

private

Option 4

none of the above

Q No.5 of 10

the fields in a class, of a C++ program are by default

Option 1

protected

Option 2

public

Option 3

private

Option 4

none of the above

Q No.6 of 10

class A
{ int i1;
protected:
int i2;
public:
int i3;
};
class B : public A
{ public:
int i4;
};
class C : B
{ };
the variable i2 is accessible

Option 1

to a public function in class A

Option 2

to public function in class B

Option 3

to a public function in class C

Option 4

all of these

Q No.7 of 10

class A
{ int i1;
protected:
int i2;
public:
int i3;
};
class B : public A
{ public:
int i4;
};
class C : B
{ };
which variable (s) is/are accessible from the main function?

Option 1

Option 2

Option 3

Option 4

None of the above

Q No.8 of 10

Forgetting to include a file ( like cmath or math.h) that is necessary will result in

Option 1

Compilation error

Option 2

Warning when the program is run

Option 3

Error at link time

Option 4

Warning when the program is compiled

Q No.9 of 10

Assume that the random number generating function - rand ( ) , returns an integer between 0 and 10000 (both inclusive). If you want to simulate the throwing of a die using this random function, use the expression

Option 1

rand ( )% 6

Option 2

rand ( ) % 6+1

Option 3

rand ( ) % 5+1

Option 4

none of the above

Q No.10 of 10

Aassume that the random number generating function - rand ( ) , returns an integer between 0 and 10000 (both inclusive). To randomly generate a number between a rand b (both inclusive ), use the expresison

Option 1

rand ( )% (b-a)

Option 2

(rand ( )% a) + b

Option 3

(rand ( ) % (b-a+1 ))+a

Option 4

(rand ( ) % ( b-a +1 )) +a

Correct Answers