OOPS Set 1

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Free Online Best OOPS MCQ Questions for improve your basic knowledge of C++. This OOPS Set 1 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

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Question 1

What are inbuilt classes?

A	The predefined classes in a language
B	The classes that are defined by the user
C	The classes which are meant to be modified by the user
D	The classes which can’t be used by the user

Question 2

What is a delete operator?

A	Deallocates a block of memory
B	Deallocates whole program memory
C	Deallocates only primitive data memory
D	Deallocates all the data reserved for a class

Question 3

To catch the exceptions ___________________

A	An object must be created to catch the exception
B	A variable should be created to catch the exception
C	An array should be created to catch all the exceptions
D	A string have to be created to store the exception

Question 4

What is the InputStream class meant for?

A	To handle all input streams
B	To handle all output streams
C	To handle all input and output streams
D	To handle only input from file

Question 5

What is the new operator?

A	Allocates memory for an object or array
B	Allocates memory for an object or array and returns a particular pointer
C	Used as return type when an object is created
D	Used to declare any new thing in a program

Question 6

How many catch blocks can a single try block can have?

A	Only 1
B	Only 2
C	Maximum 127
D	As many as required

Question 7

What are automatic variables?

A	Global variables
B	Implicit/temporary variables
C	Local variables
D	System variables

Question 8

The object ________________

A	Can be passed by reference
B	Can be passed by value
C	Can be passed by reference or value
D	Can be passed with reference

Question 9

If object is passed by value ______________

A	Copy constructor is used to copy the values into another object in the function
B	Copy constructor is used to copy the values into temporary object
C	Reference to the object is used to access the values of the object
D	Reference to the object is used to created new object in its place

Question 10

Pass by reference of an object to a function _______________

A	Affects the object in called function only
B	Affects the object in prototype only
C	Affects the object in caller function
D	Affects the object only if mentioned with & symbol with every call

Question 11

Inbuilt class __________________________

A	Must be included before use
B	Are not necessary to be included for use
C	Are used by the compiler only
D	Can be modified by programmer always

Question 12

The memory for automatic variables ___________________

A	Have to be allocated and deallocated explicitly
B	Are allocated and deallocated automatically
C	Is never actually allocated
D	Are never safe

Question 13

Which among the following is a correct statement for variables?

A	Variable can be declared many times
B	Variable can be declared only one time
C	Variable declaration can’t be done more than ones
D	Variable declaration is always done more than one time

Question 14

Which among the following not an inbuilt class in C++?

A	System
B	Color
C	String
D	Functions

Question 15

If an object is allocated using new operator ____________

A	It should be deleted using delete operator
B	It can’t be deleted using delete operator
C	It may or may not be deleted using delete operator
D	The delete operator is not applicable

Question 16

What doesn’t inbuilt classes contain?

A	Function prototype
B	Function declaration
C	Function definitions
D	Objects

Question 17

Multiple catch blocks __________________

A	Are mandatory for each try block
B	Can be combined into a single catch block
C	Are not possible for a try block
D	Can never be associated with a single try block

Question 18

Which are the two blocks that are used to check error and handle the error?

A	Try and catch
B	Trying and catching
C	Do and while
D	TryDo and Check

Question 19

Passing object to a function _______________

A	Can be done only in one way
B	Can be done in more than one ways
C	Is not possible
D	Is not possible in OOP

Question 20

What are two exception classes in hierarchy of java exceptions class?

A	Runtime exceptions only
B	Compile time exceptions only
C	Runtime exceptions and other exceptions
D	Other exceptions

Question 21

What is extern variable?

A	Variables to be used that are declared in another object file
B	Variables to be used that are declared in another source file
C	Variables to be used that are declared in another executable file
D	Variables to be used that are declared in another program

Question 22

Microsoft C++ Components extensions support new keyword to _____________

A	Modify a vtable
B	Replace a vtable slot entry
C	Add new vtable slot entries
D	Rearrange vtable slot entries

Question 23

Which among the following is not a method of Throwable class?

A	public String getMessage()
B	public Throwable getCause()
C	public void printStackTrace()
D	public Char toString()

Question 24

Which symbol should be used to pass the object by reference in C++?

A	&
B	@
C	$
D	$ or &

Question 25

What happens when new fails?

A	Returns zero always
B	Throws an exception always
C	Either throws an exception or returns zero
D	Terminates the program

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