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

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Question 1 of 30

Q-1.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 2 of 30

Q-2.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 3 of 30

Q-3.Within a switch statement

Continue can be used but Break cannot be used

Continue cannot be used but Break can be used

Both Continue and Break can be used

Neither Continue nor Break can be used

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.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 5 of 30

Q-5.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 6 of 30

Q-6.An array element is accessed using

a FIFO approach

an index number

the operator

a member name

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.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 8 of 30

Q-8.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 9 of 30

Q-9.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 10 of 30

Q-10.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 11 of 30

Q-11.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 12 of 30

Q-12.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 13 of 30

Q-13.A copy constructor takes

no argument

one argument

two arguments

arbitrary no. of arguments

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.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 15 of 30

Q-15.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 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.The operator that cannot be overloaded is

( )

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.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 19 of 30

Q-19.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 20 of 30

Q-20.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 21 of 30

Q-21.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

Question 22 of 30

Q-22.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 23 of 30

Q-23.Maximum number of template arguments in a function template is

one

two

three

many

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.Which can be passed as an argument to a function?

constant

expression

another function

all of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.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 26 of 30

Q-26.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 27 of 30

Q-27.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 28 of 30

Q-28.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 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.How many constructors can a class have?

any number

Your Answer:Correct

Your Answer:Incorrect

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