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.The statement f1.write((char*)&obj1, sizeof(obj1));

writes the member function of obj1 to f1.

Writes the data in obj1 to f1.

Writes the member function and the data of obj1 to f1

Writes the address of obj1 to f1.

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.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 3 of 30

Q-3.A copy constructor takes

no argument

one argument

two arguments

arbitrary no. of arguments

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 statement gets affected when i++ is changed to ++i?

i = 20; i++;

for (i = 0; i<20; i++) { }

a = i++;

while (i++ = 20) cout i;

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.Overloading a postfix increment operator by means of a member function takes

no argument

one argument

two arguments

three arguments

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.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 8 of 30

Q-8.Name the header file to be included for the use of built in function isalnum()

string.h

process.h

ctype.h

dos.h

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.Maximum number of template arguments in a function template is

one

two

three

many

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.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 11 of 30

Q-11.A template class

is designed to be stored in different containers

works with different data types

generates objects which must be identical

generates classes with different numbers of member functions

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.RunTime Polymorphism is achieved by ______

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.Declaration of a pointer reserves memory space

for the object.

for the pointer.

both for the object and the pointer.

none of these.

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.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 16 of 30

Q-16.Consider the following class definitions: class a { }; class b: protected a { }; What happens when we try to compile this class?

Will not compile because class body of a is not defined.

Will not compile because class body of b is not defined

Will not compile because class a is not public inherited

Will compile successfully.

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.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 18 of 30

Q-18.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 19 of 30

Q-19.A pure virtual function is a virtual function that

has no body

returns nothing

is used in base class

both (A) and (C)

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access

protected and public data only in C and B.

protected and public data only in C.

private data in A and B.

protected data in A and B.

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.Additional information sent when an exception is thrown may be placed in

the throw keyword.

the function that caused the error.

the catch block.

an object of the exception class.

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.RunTime polymorphism is achieved by ___________

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 23 of 30

Q-23.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 24 of 30

Q-24.Declaration of a pointer reserves memory space

for the object.

for the pointer.

both for the object and the pointer.

none of these.

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.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 26 of 30

Q-26.Given a class named Book, which of the following is not a valid constructor?

Book ( ) { }

Book ( Book b) { }

Book ( Book &b) { }

Book (char* author, char* title) { }

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.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 28 of 30

Q-28.Which of the following operator can be overloaded through friend function?

( )

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.A pointer to the base class can hold address of

only base class object

only derived class object

base class object as well as derived class object

None of the above

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.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

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