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 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 2 of 30

Q-2.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 3 of 30

Q-3.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 4 of 30

Q-4.What will be the values of x, m and n after the execution of the following statements? int x, m, n; m = 10; n = 15; x = ++m + n++;

x=25, m=10, n=15

x=26, m=11, n=16

x=27, m=11, n=16

x=27, m=10, n=15

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.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 6 of 30

Q-6.A variable defined within a block is visible

from the point of definition onward in the program.

from the point of definition onward in the function.

from the point of definition onward in the block.

throughout the function.

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.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 8 of 30

Q-8.In C++, dynamic memory allocation is accomplished with the operator ____

new

this

malloc( )

delete

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.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 10 of 30

Q-10.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 11 of 30

Q-11.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 12 of 30

Q-12.The break statement causes an exit

from the innermost loop only.

only from the innermost switch.

from all loops & switches.

from the innermost loop or switch.

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.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 14 of 30

Q-14.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 15 of 30

Q-15.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 16 of 30

Q-16.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.What will be the output of following program? #include void main() { float x; x=(float)9/2; cout x; }

4.5

4.0

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.A static function

should be called when an object is destroyed.

is closely connected with and individual object of a class.

can be called using the class name and function name.

is used when a dummy object must be created.

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.The new operator

returns a pointer to the variable

creates a variable called new

obtains memory for a new variable

tells how much memory is available

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.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 21 of 30

Q-21.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 22 of 30

Q-22.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 23 of 30

Q-23.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 24 of 30

Q-24.A virtual class is the same as

an abstract class

a class with a virtual function

a base class

none of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.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 26 of 30

Q-26.Consider the following statements char *ptr; ptr = “hello”; cout << *ptr; What will be printed?

first letter

entire string

it is a syntax error

last letter

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.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 28 of 30

Q-28.An exception is caused by

a hardware problem

a problem in the operating system

a syntax error

a run-time error

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.Maximum number of template arguments in a function template is

one

two

three

many

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.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

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