Programming in C++ Online Test 1 – Randomized MCQs

With each visit of this Programming in C++ online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.

Test Instructions
Question type	Randomized MCQs.Changes every time you visit the test
Total Number of Questions	30
Time Limit	20 Minutes
Points	1 Point for each Question

Remaining Time: 0 MINUTES

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Question 1 of 30

Q-1.A friend function to a class, C cannot access

private data members and member functions.

public data members and member functions.

protected data members and member functions.

the data members of the derived class of C.

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.Which of the following expressions is illegal?

(10 6).

(false && true)

bool (x) = (bool)10;

float y = 12.67;

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.Member functions, when defined within the class specification:

are always inline.

are not inline.

are inline by default, unless they are too big or too complicated.

are not inline by default.

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.The members of a class, by default, are

public

protected

private

mandatory to specify

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.Which of the following is not the characteristic of constructor.

They should be declared in the public section.

They do not have return type.

They can not be inherited.

They can be virtual.

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.Data members which are static

cannot be assigned a value

can only be used in static functions

cannot be defined in a Union

can be accessed outside the class

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.this pointer

implicitly points to an object

can be explicitly used in a class

can be used to return an object

All of the above

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.What would be the output of the following? #include void main() { char *ptr=“abcd” char ch; ch = ++*ptr++; cout ch; }

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.RunTime Polymorphism is achieved by ______

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.Which of the following is the valid class declaration header for the derived class d with base classes b1 and b2?

class d : public b1, public b2

class d : class b1, class b2

class d : public b1, b2

class d : b1, b2

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.The operator << when overloaded in a class

must be a member function

must be a non member function

can be both (A) & (B) above

cannot be overloaded

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.Which can be passed as an argument to a function?

constant

expression

another function

all of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.Which of the statements is true in a protected derivation of a derived class from a base class?

Private members of the base class become protected members of the derived class

Protected members of the base class become public members of the derived class

Public members of the base class become protected members of the derived class

Protected derivation does not affect private and protected members of the

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.Usually a pure virtual function

has complete function body.

will never be called.

will be called only to delete an object.

is defined only in derived class.

Your Answer:Correct

Your Answer:Incorrect

Question 16 of 30

Q-16.What is the output of the following codechar symbol[3]={‘a’,‘b’,‘c’}; for (int index=0; index<3; index++) cout << symbol [index];

a b c

“abc”

abc

‘abc’

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.To perform stream I/O with disk files in C++, you should

open and close files as in procedural languages

use classes derived from ios

use C language library functions to read and write data.

include the IOSTREAM.H header file.

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.The following can be declared as friend in a class

an object

a class

a public data member

a private data member

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.In multiple inheritance

the base classes must have only default constructors

cannot have virtual functions

can include virtual classes

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.To access the public function fbase() in the base class, a statement in a derived class function fder() uses the statement.fbase();

fbase();

fder();

base::fbase();

der::fder();

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.The keyword friend does not appear in

the class allowing access to another class.

the class desiring access to another class.

the private section of a class.

the public section of a class.

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.What will be the result of the expression 13 & 25?

Your Answer:Correct

Your Answer:Incorrect

Question 23 of 30

Q-23.What will be the output of the following program? #include iostream.h void main() { float x=5,y=2; int result; result=x % y; cout result; }

1.0

Error message

2.5

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.If x = y,5 = 2 then x ∧ y equals________. (where ∧ is a bitwise XOR operator)

00000111

10000010

10100000

11001000

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.The process of building new classes from existing one is called ______.

Polymorphism

Structure

Inheritance

Cascading

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.Which of the following is false for cin?

It represents standard input.

It is an object of istream class.

It is a class of which stream is an object.

Using cin the data can be read from user’s terminal

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.Which of the following ways are legal to access a class data member using this pointer?

this.x

*this.x

*(this.x)

(*this).x

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.We can output text to an object of class ostream using the insertion operator << because

the ostream class is a stream

the insertion operator works with all classes.

we are actually outputting to cout.

the insertion operator is overloaded in ostream

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.How many constructors can a class have?

any number

Your Answer:Correct

Your Answer:Incorrect

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