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.RunTime Polymorphism is achieved by ______

friend function

virtual function

operator overloading

function overloading

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.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 4 of 30

Q-4.What would be the output of the following program? int main() { int x,y=10,z=10; x = (y = =z); cout<<

Error

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.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 6 of 30

Q-6.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 7 of 30

Q-7.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 8 of 30

Q-8.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 9 of 30

Q-9.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 10 of 30

Q-10.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 11 of 30

Q-11.What will be the result of the expression 13 & 25?

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.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 13 of 30

Q-13.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 14 of 30

Q-14.A class defined within another class is:

Nested class

Inheritance

Containership

Encapsulation

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.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 16 of 30

Q-16.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 17 of 30

Q-17.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 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.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.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 21 of 30

Q-21.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 22 of 30

Q-22.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 23 of 30

Q-23.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 24 of 30

Q-24.You can read input that consists of multiple lines of text using

the normal cout << combination.

the cin.get( ) function with one argument.

the cin.get( ) function with two arguments.

the cin.get( ) function with three arguments.

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.In access control in a protected derivation, visibility modes will change as follows:

private, public and protected become protected

only public becomes protected.

public and protected become protected.

only private becomes protected.

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.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 27 of 30

Q-27.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 28 of 30

Q-28.The address of a variable temp of type float is

*temp

&temp

float& temp

float temp&

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.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 30 of 30

Q-30.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

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