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

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Question 1 of 30

Q-1.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.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 3 of 30

Q-3.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 4 of 30

Q-4.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 5 of 30

Q-5.The process of building new classes from existing one is called

Structure

Inheritance

Polymorphism

Template

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.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 7 of 30

Q-7.The members of a class, by default, are

public

protected

private

mandatory to specify

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.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 9 of 30

Q-9.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 10 of 30

Q-10.The address of a variable temp of type float is

*temp

&temp

float& temp

float temp&

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.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 12 of 30

Q-12.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 13 of 30

Q-13.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 14 of 30

Q-14.Which of the following will produce a value 10 if x = 9.7?

floor(x)

abs(x)

log(x)

ceil(x)

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.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 16 of 30

Q-16.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 17 of 30

Q-17.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 18 of 30

Q-18.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 19 of 30

Q-19.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 20 of 30

Q-20.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 21 of 30

Q-21.Overloading the function operator

requires a class with an overloaded operator.

requires a class with an overloaded [ ] operator.

allows you to create objects that act syntactically like functions

usually make use of a constructor that takes arguments.

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.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 23 of 30

Q-23.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 24 of 30

Q-24.A library function exit() causes an exit from

the loop in which it occurs

the block in which it occurs

the function in which it occurs

the program in which it occurs

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.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 26 of 30

Q-26.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 27 of 30

Q-27.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 28 of 30

Q-28.Pure virtual functions

have to be redefined in the inherited class.

cannot have public access specification.

are mandatory for a virtual class.

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.A property which is not true for classes is that they

are removed from memory when not in use.

permit data to be hidden from other classes

bring together all aspects of an entity in one place.

Can closely model objects in the real world.

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.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

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