Programming in C++ Online Test 1

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 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 2 of 30

Q-2.An exception is caused by

a runtime error.

a syntax error.

a problem in the operating system.

a hardware problem.

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.Consider the following statements: int x = 22,y=15; x = (x>y) ? (x+y) : (x-y); What will be the value of x after executing these statements?

Error. Cannot be executed

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.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 5 of 30

Q-5.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 6 of 30

Q-6.for (; ?

means the test which is done using some expression is always true

is not valid

will loop forever

should be written as for( )

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.If we create a file by ‘ifstream’, then the default mode of the file is _________

ios :: out

ios :: in

ios :: app

ios :: binary

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.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 9 of 30

Q-9.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 10 of 30

Q-10.Which of the following statements is NOT valid about operator overloading?

Only existing operators can be overloaded.

Overloaded operator must have at least one operand of its class type.

The overloaded operators follow the syntax rules of the original operator.

none of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.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 12 of 30

Q-12.A function call mechanism that passes arguments to a function by passing a copy of the values of the arguments is __________

call by name

call by value

call by reference

call by value result

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.The operator that cannot be overloaded is

( )

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.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 15 of 30

Q-15.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 16 of 30

Q-16.A struct is the same as a class except that

there are no member functions.

all members are public.

cannot be used in inheritance hierarchy.

it does have a this pointer.

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.It is possible to declare as a friend

a member function

a global function

a class

all of the above

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.In which case is it mandatory to provide a destructor in a class?

Almost in every class

Class for which two or more than two objects will be created

Class for which copy constructor is defined

Class whose objects will be created dynamically

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.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 20 of 30

Q-20.Which of the following cannot be legitimately passed to a function

A constant.

A variable.

A structure.

A header file.

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.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 22 of 30

Q-22.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 23 of 30

Q-23.To convert from a user defined class to a basic type, you would most likely use.

A built-in conversion function

A one-argument constructor

A conversion function that’s a member of the class.

An overloaded ‘=‘ operator.

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.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 25 of 30

Q-25.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 26 of 30

Q-26.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 27 of 30

Q-27.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 28 of 30

Q-28.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 29 of 30

Q-29.The address of a variable temp of type float is

*temp

&temp

float& temp

float temp&

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.If a base class destructor is not virtual, then

It can not have a function body.

It can not be called.

It can not be called when accessed from pointer.

Destructor in derived class can not be called when accessed through a pointer to the base class.

Your Answer:Correct

Your Answer:Incorrect

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Programming in C++ Online Test 1 – Randomized MCQs

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