144 + Mcqs in C++ Programming Questions in Computer Science MCQs Page 1 McqOptions

1.	If base class has constructor with arguments, then it is ________________ for the derived class to have constructor and pass the arguments to base class constructor.
A.	Optional
B.	Mandatory
C.	Compiler dependent
D.	Error
Answer» C. Compiler dependent

Discussion

2.	During a class inheritance in CPP, if the visibility mode or mode of derivation is not provided, then by default visibility mode is ___________.
A.	public
B.	protected
C.	private
D.	Friend
Answer» D. Friend

Discussion

3.	Logical expressions produce ____________ type results.
A.	explicit
B.	garbage
C.	bool
D.	static
Answer» D. static

Discussion

4.	Private members of the class are accessible only to the members of the same class.
A.	True
B.	False
Answer» C.

Discussion

5.	Due to ios::trunc mode, the file is truncated to zero length.
A.	True
B.	False
Answer» B. False

Discussion

6.	While redefining a virtual function in the derived class, if its prototype is changed then ___________________ .
A.	It will be overloaded by the compiler
B.	Its virtual nature will be lost
C.	both a and b
D.	Compiler will generate “Prototype mismatch error”
Answer» D. Compiler will generate “Prototype mismatch error”

Discussion

7.	Can struct be used as Base class for inheritance ?
A.	Yes
B.	No
Answer» B. No

Discussion

8.	If a program uses Inline Function, then the function is expanded inline at ___________.
A.	Compile time
B.	Run time
C.	Both a and b
D.	None of these
Answer» C. Both a and b

Discussion

9.	Can we alter/modify the values of data members of a class inside const member function?
A.	Yes
B.	No
Answer» B. No

Discussion

10.	Which of the following is not used to seek a file pointer?
A.	ios::cur
B.	ios::set
C.	ios::end
D.	ios::beg
Answer» C. ios::end

Discussion

11.	During dynamic memory allocation in CPP, new operator returns _________ value if memory allocation is unsuccessful.
A.	False
B.	Zero
C.	None of these
Answer» C. None of these

Discussion

12.	Which of the followings is/are pointer-to-member declarator?
A.	->*
B.	.*
C.	::*
D.	both a and b
Answer» D. both a and b

Discussion

13.	Default value of static variable is_____ .
A.	0
B.	1
C.	Garbage value
D.	Compiler dependent
Answer» B. 1

Discussion

14.	________ are used to format the data display in CPP.
A.	Iterators
B.	Punctuators
C.	Manipulators
D.	Allocators
Answer» D. Allocators

Discussion

15.	Reusability of the code can be achieved in CPP through ______ .
A.	Polymorphism
B.	Encapsulation
C.	Inheritance
D.	Both a and c
Answer» D. Both a and c

Discussion

16.	Can we pass parameters to base class constructor though derived class or derived class constructor?
A.	Yes
B.	No
Answer» B. No

Discussion

17.	A try block can be nested under another try block.
A.	True
B.	False
Answer» B. False

Discussion

18.	We can prevent a function from throwing any exceptions.
A.	True
B.	False
Answer» B. False

Discussion

19.	In nested try blocks, there is no need to specify catch handler for inner try block. Outer catch handler is sufficient for the program.
A.	True
B.	False
Answer» C.

Discussion

20.	Functions called from within a try block may also throw exception.
A.	True
B.	False
Answer» B. False

Discussion

21.	The explicit keyword is an optional decoration for the constructors that takes exactly_____argument.
A.	No argument
B.	Two
C.	Three
D.	One
Answer» E.

Discussion

22.	A class can contain objects of other classes and this phenomenon is called_________ .
A.	Relationship
B.	Object Association
C.	Containership
D.	None of these
Answer» D. None of these

Discussion

23.	If a class contains pure virtual function, then it is termed as____________________ .
A.	Virtual class
B.	Sealed class
C.	Pure Local class
D.	Abstract Class
Answer» E.

Discussion

24.	In a program, If there exists a function template with two parameters and normal function say void add(int , int), so add(3,4) will _____________________ .
A.	Invoke function template body as it is generic one
B.	Invokes normal function as it exactly matches with its prototype
C.	Not be called and Compiler issues warning
D.	Not be called and Compiler issues ambiguity in calling add()
Answer» C. Not be called and Compiler issues warning

Discussion

25.	Attempting to throw an exception that is not supported by a function call results in calling _____________ library function.
A.	indeterminate()
B.	unutilized()
C.	unexpected()
D.	unpredicted()
Answer» D. unpredicted()

Discussion

26.	In CPP, dynamic memory allocation is done using ______________ operator.
A.	calloc()
B.	malloc()
C.	allocate
D.	New
Answer» E.

Discussion

27.	Which of the following is not a file opening mode ____ .
A.	ios::ate
B.	ios::nocreate
C.	ios::noreplace
D.	ios::truncate
Answer» E.

Discussion

28.	Is it possible to define a constructor with default arguments?
A.	Yes
B.	No
Answer» B. No

Discussion

29.	How can we restrict a function to throw certain exceptions?
A.	Defining multiple try and catch block inside a function
B.	Defining generic function within try block
C.	Defining function with throw clause
D.	It is not possible in CPP to restrict a function
Answer» D. It is not possible in CPP to restrict a function

Discussion

30.	In any ways, Non-member function cannot have access to the private data of the class.
A.	True
B.	False
Answer» C.

Discussion

31.	When a virtual function is redefined by the derived class, it is called___________.
A.	Overloading
B.	Overriding
C.	Rewriting
D.	All of these
Answer» C. Rewriting

Discussion

32.	Private members of the class are not inheritable.
A.	True
B.	False
Answer» C.

Discussion

33.	Can we allocate memory for the objects dynamically in CPP?
A.	Yes
B.	No
Answer» B. No

Discussion

34.	Which of the following is not a casting operator in CPP?
A.	explicit_cast
B.	static_cast
C.	dynamic_cast
D.	reinterpret_cast
Answer» B. static_cast

Discussion

35.	If the derived class is struct, then default visibility mode is _______ .
A.	public
B.	protected
C.	private
D.	struct can’t inherit class
Answer» B. protected

Discussion

36.	___________ header file is used for manipulators.
A.	< iomanipulator.h>
B.	< stdiomanip.h>
C.	< stdmanip.h>
D.	< iomanip.h>
Answer» E.

Discussion

37.	Which of the following manipulator is used for the representing octal equivalent of a given decimal number?
A.	oct
B.	setbase(8)
C.	tobase(8)
D.	both a and b
E.	all a, b, c
Answer» E. all a, b, c

Discussion

38.	const member function does not allow to modify/alter value of any data member of the class.
A.	True
B.	False
Answer» B. False

Discussion

39.	Scope resolution operator is used______ .
A.	to resolve the scope of global variables only
B.	to resolve the scope of functions of the classes only
C.	to resolve scope of global variables as well as functions of the classes
D.	None of these
Answer» D. None of these

Discussion

40.	The purpose of explicit keyword is to tell the compiler that a certain constructor may not be used to implicitly cast an expression to its class type.
A.	True
B.	False
Answer» B. False

Discussion

41.	If inner catch handler is not able to handle the exception then__________ .
A.	Compiler will look for outer try handler
B.	Program terminates abnormally
C.	Compiler will check for appropriate catch handler of outer try block
D.	None of these
Answer» D. None of these

Discussion

42.	Which one is suitable syntax for function template?
A.	template< class T> return_type Function_Name(parameters)
B.	template< typename T> return_type Function_Name(parameters)
C.	both a and b
D.	None of these
Answer» D. None of these

Discussion

43.	It is not possible to combine two or more file opening mode in open () method.
A.	True
B.	False
Answer» C.

Discussion

44.	In case of operator overloading, operator function must be ______ . 1. Static member functions 2. Non- static member functions 3. Friend Functions
A.	Only 2
B.	Only 1, 3
C.	Only 2 , 3
D.	All 1 , 2, 3
Answer» D. All 1 , 2, 3

Discussion

45.	Generic catch handler is represented by ______________ .
A.	catch(..,)
B.	catch(---)
C.	catch(…)
D.	catch( void x)
Answer» D. catch( void x)

Discussion

46.	While overloading binary operators using member function, it requires ___ argument/s.
A.	Zero
B.	One
C.	Two
D.	Three
Answer» C. Two

Discussion

47.	If abstract class is inherited by derived class, then_______________ .
A.	Derived class should provide definition for all the pure virtual functions
B.	Derived class also become abstract if fails to implement pure virtual functions
C.	Objects of derived class can’t be created if it fails to implement pure virtual functions
D.	All of these
Answer» E.

Discussion

48.	Streams that will be performing both input and output operations must be declared as class _________ .
A.	iostream
B.	fstream
C.	stdstream
D.	Stdiostream
Answer» C. stdstream

Discussion

49.	Exception handlers are declared with ____________ keyword.
A.	Try
B.	catch
C.	throw
D.	Finally
Answer» C. throw

Discussion

50.	Which of the following statements are true about Catch handler? 1. It must be placed immediately after try block T. 2. It can have multiple parameters. 3. There must be only one catch handler for every try block. 4. There can be multiple catch handler for a try block T. 5. Generic catch handler can be placed anywhere after try block.
A.	Only 1, 4, 5
B.	Only 1, 2, 3
C.	Only 1, 4
D.	Only 1, 2
Answer» D. Only 1, 2

Discussion

Explore topic-wise MCQs in Computer Science Mcqs.

If base class has constructor with arguments, then it is ________________ for the derived class to have constructor and pass the arguments to base class constructor.

During a class inheritance in CPP, if the visibility mode or mode of derivation is not provided, then by default visibility mode is ___________.

Logical expressions produce ____________ type results.

Private members of the class are accessible only to the members of the same class.

Due to ios::trunc mode, the file is truncated to zero length.

While redefining a virtual function in the derived class, if its prototype is changed then ___________________ .

Can struct be used as Base class for inheritance ?

If a program uses Inline Function, then the function is expanded inline at ___________.

Can we alter/modify the values of data members of a class inside const member function?

Which of the following is not used to seek a file pointer?

During dynamic memory allocation in CPP, new operator returns _________ value if memory allocation is unsuccessful.

Which of the followings is/are pointer-to-member declarator?

Default value of static variable is_____ .

________ are used to format the data display in CPP.

Reusability of the code can be achieved in CPP through ______ .

Can we pass parameters to base class constructor though derived class or derived class constructor?

A try block can be nested under another try block.

We can prevent a function from throwing any exceptions.

In nested try blocks, there is no need to specify catch handler for inner try block. Outer catch handler is sufficient for the program.

Functions called from within a try block may also throw exception.

The explicit keyword is an optional decoration for the constructors that takes exactly_____argument.

A class can contain objects of other classes and this phenomenon is called_________ .

If a class contains pure virtual function, then it is termed as____________________ .

In a program, If there exists a function template with two parameters and normal function say void add(int , int), so add(3,4) will _____________________ .

Attempting to throw an exception that is not supported by a function call results in calling _____________ library function.

In CPP, dynamic memory allocation is done using ______________ operator.

Which of the following is not a file opening mode ____ .

Is it possible to define a constructor with default arguments?

How can we restrict a function to throw certain exceptions?

In any ways, Non-member function cannot have access to the private data of the class.

When a virtual function is redefined by the derived class, it is called___________.

Private members of the class are not inheritable.

Can we allocate memory for the objects dynamically in CPP?

Which of the following is not a casting operator in CPP?

If the derived class is struct, then default visibility mode is _______ .

___________ header file is used for manipulators.

Which of the following manipulator is used for the representing octal equivalent of a given decimal number?

const member function does not allow to modify/alter value of any data member of the class.

Scope resolution operator is used______ .

The purpose of explicit keyword is to tell the compiler that a certain constructor may not be used to implicitly cast an expression to its class type.

If inner catch handler is not able to handle the exception then__________ .

Which one is suitable syntax for function template?

It is not possible to combine two or more file opening mode in open () method.

In case of operator overloading, operator function must be ______ . 1. Static member functions 2. Non- static member functions 3. Friend Functions

Generic catch handler is represented by ______________ .

While overloading binary operators using member function, it requires ___ argument/s.

If abstract class is inherited by derived class, then_______________ .

Streams that will be performing both input and output operations must be declared as class _________ .

Exception handlers are declared with ____________ keyword.