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 process of building new classes from existing one is called

Structure

Inheritance

Polymorphism

Template

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.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 3 of 30

Q-3.Exception handling is targeted at

Run-time error

Compile time error

Logical error

All of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.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 5 of 30

Q-5.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 6 of 30

Q-6.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 7 of 30

Q-7.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.Which of the following statements are true in c++?

Classes can not have data as public members.

Structures can not have functions as members.

Class members are public by default.

None of these.

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.Function templates can accept

any type of parameters

only one parameter

only parameters of the basic type

only parameters of the derived type

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.What is the error in the following code? class t { virtual void print(); }

No error.

Function print() should be declared as static.

Function print() should be defined.

Class t should contain data members.

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.Which of the following operator can be overloaded through friend function?

( )

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.Which of the following statement is valid?

We can create new C++ operators.

We can change the precedence of the C++ operators.

We can change the associativity of the C++ operators.

We can not change operator templates.

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.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 14 of 30

Q-14.The members of a class, by default, are

public

protected

private

mandatory to specify

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.If the variable count exceeds 100, a single statement that prints “Too many” is

if (count<100) cout << “Too many”;

if (count>100) cout >> “Too many”;

if (count>100) cout << “Too many”;

None of these

Your Answer:Correct

Your Answer:Incorrect

Question 16 of 30

Q-16.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 17 of 30

Q-17.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 18 of 30

Q-18.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 19 of 30

Q-19.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 20 of 30

Q-20.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.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 22 of 30

Q-22.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 23 of 30

Q-23.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 24 of 30

Q-24.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 25 of 30

Q-25.If we store the address of a derived class object into a variable whose type is a pointer to the base class, then the object, when accessed using this pointer.

continues to act like a derived class object.

Continues to act like a derived class object if virtual functions are called.

Acts like a base class object.

Acts like a base class, if virtual functions are called.

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.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 27 of 30

Q-27.In C++, dynamic memory allocation is accomplished with the operator ____

new

this

malloc( )

delete

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.If an array is declared as int a[4] = {3, 0, 1, 2}, then values assigned to a[0] & a[4] will be ________

3, 2

0, 2

3, 0

0, 4

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.RunTime polymorphism is achieved by ___________

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.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

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Programming in C++ Online Test 1 – Randomized MCQs

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