Which among the following is true for static constructor?

Static constructors can be used to initialize the non-static members also

Static constructors are called with every new object

Static constructors are used initialize data members to zero always

Static constructors can’t be parameterized constructors

Static constructors can be used to initialize the non-static members also

When and how many times a static constructor is called?

Called at first time when an object is created and called with every new object creation

Created at time of object destruction

Called at first time when an object is created and only one time

Called at first time when an object is created and called with every new object creation

Called whenever an object go out of scope

Why do we use static constructors?

To initialize all the members with static value

To initialize the static members of class

To initialize all the members with static value

To delete the static members when not required

To clear all the static members initialized values

Which type of constructor can’t have a return type?

Constructors don’t have a return type

Which among the following is true?

Default constructor is and always called implicitly only

Default constructor can’t be defined by the programmer

Default parameters constructor isn’t equivalent to default constructor

Default constructor can be called explicitly

Default constructor is and always called implicitly only

It’s necessary to pass object by reference in copy constructor because:

Constructor is called in pass by reference only

Constructor is not called in pass by reference

Constructor is called in pass by reference only

It passes the address of new constructor to be created

It passes the address of new object to be created

For constructor overloading, each constructor must differ in ___________ and __________

Number of arguments and return type

Number of arguments and type of arguments

Number of arguments and return type

Return type and type of arguments

Data stored in data members won’t be accessible

Implicit call to a default constructor

Explicit call to a copy constructor

Implicit call to a parameterized constructor

If the object is passed by value to a copy constructor:

Data stored in data members won’t be accessible

Only public members will be accessible to be copied

Compiler will give out of memory error

Data stored in data members won’t be accessible

Which among the following is true for copy constructor?

Used when an object is passed by value to a function

The argument object is passed by reference

It can be defined with zero arguments

Used when an object is passed by value to a function

Used when a function returns an object

If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?

Constructor of C then B, finally of A

Constructor of A then C, finally of B

Constructor of C then A, finally B

Constructor of A then B, finally C

If a programmer defines a class and defines a default value parameterized constructor inside it. He has not defined any default constructor. And then he try to create the object without passing arguments, which among the following will be correct?

It will not create the object ( as the default constructor is not defined )

It will not create the object (as parameterized constructor is used)

It will create the object (as the default arguments are passed )

It will not create the object ( as the default constructor is not defined )

It will create the object ( as at least some constructor is defined )

Which among the following is not a necessary condition for constructors?

Its name must be same as that of class

It must not have any return type

It must contain a definition body

If two classes combine some private data members and provides public member functions to access and manipulate those data members. Where is abstraction used?

Data is not sufficient to decide what is being used

Using private access specifier for data members

Using class concept with both data members and member functions

Using public member functions to access and manipulate the data members

Data is not sufficient to decide what is being used

In terms of stream and files________

Abstraction is called a file and device is called a stream

Abstraction is called a stream and device is called a file

Abstraction is called a file and device is called a stream

Abstraction can be called both file and stream

Abstraction can’t be defined in terms of files and stream

Encapsulation and abstraction differ as:

Hiding and Binding respectively

Binding and Hiding respectively

Hiding and Binding respectively

Abstraction principle includes___________

Use abstraction whenever possible to achieve OOP

Use abstraction to avoid longer codes

Use abstraction whenever possible to avoid duplication

Use abstraction whenever possible to achieve OOP

Hiding the implementation complexity can:

Provide more number of features

Which among the following best defines abstraction?

Hiding the implementation and showing only the features

Which among the following can be a concept against encapsulation rules?

Using char* string pointer to be passed to non-member function

Using any kind of pointer/array address in passing to another function

Which among the following would destroy the encapsulation mechanism if it was allowed in programming?

Using access declaration for public members of base class

Using access declaration for private members of base class

Using access declaration for public members of base class

Using access declaration for local variable of main() function

Using access declaration for global variables

Which among the following should be encapsulated?

The data prone to change in long terms

Which among the following should be encapsulated?

The data prone to change in long terms

The data which is intended to be changed

The data which belongs to some other class

Find which of the following uses encapsulation?

struct topper{ char name[10]; public : int marks; }struct topper{ char name[10]; public : int marks; }

void main(){ int a; void fun( int a=10; cout

class student{ int a; public: int b;};

class student{int a; public: void disp(){ cout

struct topper{ char name[10]; public : int marks; }struct topper{ char name[10]; public : int marks; }

While using encapsulation, which among the following is possible?

Data member’s type can’t be changed, or whole code have to be changed

Code modification can be additional overhead

Data member’s data type can be changed without changing any other code

Data member’s type can’t be changed, or whole code have to be changed

Member functions can be used to change the data type of data members

If data members are private, what can we do to access them from the class object?

Create private member functions to access those data members

Create public member functions to access those data members

Create private member functions to access those data members

Create protected member functions to access those data members

Private data members can never be accessed from outside the class

Which among the following best describes encapsulation?

It is a way of combining various data members into a single unit

It is a way of combining various member functions into a single unit

It is a way of combining various data members and member functions into a single unit which can operate on any data

It is a way of combining various data members and member functions that operate on those data members into a single unit

If 2 classes derive one base class and redefine a function of base class, also overload some operators inside class body. Among these two things of function and operator overloading, where is polymorphism used?

Both of these are using polymorphism

Either function overloading or operator overloading because polymorphism can be applied only once in a program

Which among the following is not true for polymorphism?

Helps in redefining the same functionality

Increases overhead of function definition always

916 + Mcqs in OOPS in Technical Programming Page 17 McqOptions

801.	Which among the following is true for static constructor?
A.	Static constructors are called with every new object
B.	Static constructors are used initialize data members to zero always
C.	Static constructors can’t be parameterized constructors
D.	Static constructors can be used to initialize the non-static members also
Answer» D. Static constructors can be used to initialize the non-static members also

Discussion

802.	When and how many times a static constructor is called?
A.	Created at time of object destruction
B.	Called at first time when an object is created and only one time
C.	Called at first time when an object is created and called with every new object creation
D.	Called whenever an object go out of scope
Answer» C. Called at first time when an object is created and called with every new object creation

Discussion

803.	Why do we use static constructors?
A.	To initialize the static members of class
B.	To initialize all the members with static value
C.	To delete the static members when not required
D.	To clear all the static members initialized values
Answer» B. To initialize all the members with static value

Discussion

804.	Which type of constructor can’t have a return type?
A.	Default
B.	Parameterized
C.	Copy
D.	Constructors don’t have a return type
Answer» E.

Discussion

805.	Which among the following is true?
A.	Default constructor can’t be defined by the programmer
B.	Default parameters constructor isn’t equivalent to default constructor
C.	Default constructor can be called explicitly
D.	Default constructor is and always called implicitly only
Answer» D. Default constructor is and always called implicitly only

Discussion

806.	Which specifier applies only to the constructors?
A.	Public
B.	Protected
C.	Implicit
D.	Explicit
Answer» E.

Discussion

807.	It’s necessary to pass object by reference in copy constructor because:
A.	Constructor is not called in pass by reference
B.	Constructor is called in pass by reference only
C.	It passes the address of new constructor to be created
D.	It passes the address of new object to be created
Answer» B. Constructor is called in pass by reference only

Discussion

808.	Which constructor is called while assigning some object with another?
A.	Default
B.	Parameterized
C.	Copy
D.	Direct assignment is used
Answer» D. Direct assignment is used

Discussion

809.	How many types of constructors are available, in general, in any language?
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

Discussion

810.	For constructor overloading, each constructor must differ in ___________ and __________
A.	Number of arguments and type of arguments
B.	Number of arguments and return type
C.	Return type and type of arguments
D.	Return type and definition
Answer» B. Number of arguments and return type

Discussion

811.	Data stored in data members won’t be accessible
A.	Implicit call to a default constructor
B.	Explicit call to a copy constructor
C.	Implicit call to a parameterized constructor
D.	Explicit call to a constructor
Answer» E.

Discussion

812.	If the object is passed by value to a copy constructor:
A.	Only public members will be accessible to be copied
B.	That will work normally
C.	Compiler will give out of memory error
D.	Data stored in data members won’t be accessible
Answer» D. Data stored in data members won’t be accessible

Discussion

813.	Which among the following is true for copy constructor?
A.	The argument object is passed by reference
B.	It can be defined with zero arguments
C.	Used when an object is passed by value to a function
D.	Used when a function returns an object
Answer» C. Used when an object is passed by value to a function

Discussion

814.	In multiple inheritance, if class C inherits two classes A and B as follows, which class constructor will be called first: class A{ }; class B{ }; class C: public A, public B{ };
A.	A()
B.	B()
C.	C()
D.	Can’t be determined
Answer» B. B()

Discussion

815.	If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?
A.	Constructor of C then B, finally of A
B.	Constructor of A then C, finally of B
C.	Constructor of C then A, finally B
D.	Constructor of A then B, finally C
Answer» E.

Discussion

816.	Default constructor must be defined, if parameterized constructor is defined and the object is to be created without arguments.
A.	True
B.	False
Answer» B. False

Discussion

817.	If a programmer defines a class and defines a default value parameterized constructor inside it. He has not defined any default constructor. And then he try to create the object without passing arguments, which among the following will be correct?
A.	It will not create the object (as parameterized constructor is used)
B.	It will create the object (as the default arguments are passed )
C.	It will not create the object ( as the default constructor is not defined )
D.	It will create the object ( as at least some constructor is defined )
Answer» C. It will not create the object ( as the default constructor is not defined )

Discussion

818.	How many types of constructors are available for use in general (with respect to parameters)?
A.	2
B.	3
C.	4
D.	5
Answer» B. 3

Discussion

819.	In which access should a constructor be defined, so that object of the class can be created in any function?
A.	Public
B.	Protected
C.	Private
D.	Any access specifier will work
Answer» B. Protected

Discussion

820.	Which among the following is not a necessary condition for constructors?
A.	Its name must be same as that of class
B.	It must not have any return type
C.	It must contain a definition body
D.	It can contains arguments
Answer» D. It can contains arguments

Discussion

821.	Which among the following is called first, automatically, whenever an object is created?
A.	Class
B.	Constructor
C.	New
D.	Trigger
Answer» C. New

Discussion

822.	Using higher degree of abstraction __________
A.	May get unsafe
B.	May reduce readability
C.	Can be safer
D.	Can increase vulnerability
Answer» D. Can increase vulnerability

Discussion

823.	Which among the following is not a level of abstraction:
A.	Logical level
B.	Physical level
C.	View level
D.	External level
Answer» E.

Discussion

824.	A phone is made up of many components like motherboard, camera, sensors and etc. If the processor represents all the functioning of phone, display shows the display only, and the phone is represented as a whole. Which among the following have highest level of abstraction?
A.	Motherboard
B.	Display
C.	Camera
D.	Phone
Answer» E.

Discussion

825.	If two classes combine some private data members and provides public member functions to access and manipulate those data members. Where is abstraction used?
A.	Using private access specifier for data members
B.	Using class concept with both data members and member functions
C.	Using public member functions to access and manipulate the data members
D.	Data is not sufficient to decide what is being used
Answer» D. Data is not sufficient to decide what is being used

Discussion

826.	In terms of stream and files________
A.	Abstraction is called a stream and device is called a file
B.	Abstraction is called a file and device is called a stream
C.	Abstraction can be called both file and stream
D.	Abstraction can’t be defined in terms of files and stream
Answer» B. Abstraction is called a file and device is called a stream

Discussion

827.	Encapsulation and abstraction differ as:
A.	Binding and Hiding respectively
B.	Hiding and Binding respectively
C.	Can be used any way
D.	Hiding and hiding respectively
Answer» B. Hiding and Binding respectively

Discussion

828.	Higher the level of abstraction, higher are the details.
A.	True
B.	False
Answer» C.

Discussion

829.	Abstraction principle includes___________
A.	Use abstraction at its minimum
B.	Use abstraction to avoid longer codes
C.	Use abstraction whenever possible to avoid duplication
D.	Use abstraction whenever possible to achieve OOP
Answer» D. Use abstraction whenever possible to achieve OOP

Discussion

830.	Which among the following can be viewed as combination of abstraction of data and code.
A.	Class
B.	Object
C.	Inheritance
D.	Interfaces
Answer» C. Inheritance

Discussion

831.	Abstraction can apply to:
A.	Control and data
B.	Only data
C.	Only control
D.	Classes
Answer» B. Only data

Discussion

832.	Abstraction gives higher degree of ________
A.	Class usage
B.	Program complexity
C.	Idealized interface
D.	Unstable interface
Answer» D. Unstable interface

Discussion

833.	Object is ________ abstraction
A.	Object
B.	Logical
C.	Real
D.	Hypothetical
Answer» D. Hypothetical

Discussion

834.	Class is _________ abstraction
A.	Object
B.	Logical
C.	Real
D.	Hypothetical
Answer» C. Real

Discussion

835.	Hiding the implementation complexity can:
A.	Make the programming easy
B.	Make the programming complex
C.	Provide more number of features
D.	Provide better features
Answer» B. Make the programming complex

Discussion

836.	Which among the following best defines abstraction?
A.	Hiding the implementation
B.	Showing the important data
C.	Hiding the important data
D.	Hiding the implementation and showing only the features
Answer» E.

Discussion

837.	Using encapsulation data security is ___________
A.	Not ensured
B.	Ensured to some extent
C.	Purely ensured
D.	Very low
Answer» C. Purely ensured

Discussion

838.	Encapsulation is the way to add functions in a user defined structure.
A.	True
B.	False
Answer» C.

Discussion

839.	Which among the following can be a concept against encapsulation rules?
A.	Using function pointers
B.	Using char* string pointer to be passed to non-member function
C.	Using object array
D.	Using any kind of pointer/array address in passing to another function
Answer» E.

Discussion

840.	Which among the following would destroy the encapsulation mechanism if it was allowed in programming?
A.	Using access declaration for private members of base class
B.	Using access declaration for public members of base class
C.	Using access declaration for local variable of main() function
D.	Using access declaration for global variables
Answer» B. Using access declaration for public members of base class

Discussion

841.	Which among the following violates the principle of encapsulation almost always?
A.	Local variables
B.	Global variables
C.	Public variables
D.	Array variables
Answer» C. Public variables

Discussion

842.	How can Encapsulation be achieved?
A.	Using Access Specifiers
B.	Using only private members
C.	Using inheritance
D.	Using Abstraction
Answer» B. Using only private members

Discussion

843.	Which among the following should be encapsulated?
A.	Which among the following should be encapsulated?
B.	The data prone to change in long terms
C.	The data which is intended to be changed
D.	The data which belongs to some other class
Answer» B. The data prone to change in long terms

Discussion

844.	Encapsulation helps in writing ___________ classes in java
A.	Mutable
B.	Abstract
C.	Wrapper
D.	Immutable
Answer» E.

Discussion

845.	Find which of the following uses encapsulation?
A.	void main(){ int a; void fun( int a=10; cout<<a); fun(); }
B.	class student{ int a; public: int b;};
C.	class student{int a; public: void disp(){ cout<<a;} };
D.	struct topper{ char name[10]; public : int marks; }struct topper{ char name[10]; public : int marks; }
Answer» D. struct topper{ char name[10]; public : int marks; }struct topper{ char name[10]; public : int marks; }

Discussion

846.	While using encapsulation, which among the following is possible?
A.	Code modification can be additional overhead
B.	Data member’s data type can be changed without changing any other code
C.	Data member’s type can’t be changed, or whole code have to be changed
D.	Member functions can be used to change the data type of data members
Answer» C. Data member’s type can’t be changed, or whole code have to be changed

Discussion

847.	If data members are private, what can we do to access them from the class object?
A.	Create public member functions to access those data members
B.	Create private member functions to access those data members
C.	Create protected member functions to access those data members
D.	Private data members can never be accessed from outside the class
Answer» B. Create private member functions to access those data members

Discussion

848.	Which among the following best describes encapsulation?
A.	It is a way of combining various data members into a single unit
B.	It is a way of combining various member functions into a single unit
C.	It is a way of combining various data members and member functions into a single unit which can operate on any data
D.	It is a way of combining various data members and member functions that operate on those data members into a single unit
Answer» E.

Discussion

849.	If 2 classes derive one base class and redefine a function of base class, also overload some operators inside class body. Among these two things of function and operator overloading, where is polymorphism used?
A.	Function overloading only
B.	Operator overloading only
C.	Both of these are using polymorphism
D.	Either function overloading or operator overloading because polymorphism can be applied only once in a program
Answer» E.

Discussion

850.	Which among the following is not true for polymorphism?
A.	It is feature of OOP
B.	Ease in readability of program
C.	Helps in redefining the same functionality
D.	Increases overhead of function definition always
Answer» E.

Discussion

Explore topic-wise MCQs in Technical Programming.

Which among the following is true for static constructor?

When and how many times a static constructor is called?

Why do we use static constructors?

Which type of constructor can’t have a return type?

Which among the following is true?

Which specifier applies only to the constructors?

It’s necessary to pass object by reference in copy constructor because:

Which constructor is called while assigning some object with another?

How many types of constructors are available, in general, in any language?

For constructor overloading, each constructor must differ in ___________ and __________

Data stored in data members won’t be accessible

If the object is passed by value to a copy constructor:

Which among the following is true for copy constructor?

In multiple inheritance, if class C inherits two classes A and B as follows, which class constructor will be called first: class A{ }; class B{ }; class C: public A, public B{ };

If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?

Default constructor must be defined, if parameterized constructor is defined and the object is to be created without arguments.

If a programmer defines a class and defines a default value parameterized constructor inside it. He has not defined any default constructor. And then he try to create the object without passing arguments, which among the following will be correct?

How many types of constructors are available for use in general (with respect to parameters)?

In which access should a constructor be defined, so that object of the class can be created in any function?

Which among the following is not a necessary condition for constructors?

Which among the following is called first, automatically, whenever an object is created?

Using higher degree of abstraction __________

Which among the following is not a level of abstraction:

A phone is made up of many components like motherboard, camera, sensors and etc. If the processor represents all the functioning of phone, display shows the display only, and the phone is represented as a whole. Which among the following have highest level of abstraction?

If two classes combine some private data members and provides public member functions to access and manipulate those data members. Where is abstraction used?

In terms of stream and files________

Encapsulation and abstraction differ as:

Higher the level of abstraction, higher are the details.

Abstraction principle includes___________

Which among the following can be viewed as combination of abstraction of data and code.

Abstraction can apply to:

Abstraction gives higher degree of ________

Object is ________ abstraction

Class is _________ abstraction

Hiding the implementation complexity can:

Which among the following best defines abstraction?

Using encapsulation data security is ___________

Encapsulation is the way to add functions in a user defined structure.

Which among the following can be a concept against encapsulation rules?

Which among the following would destroy the encapsulation mechanism if it was allowed in programming?

Which among the following violates the principle of encapsulation almost always?

How can Encapsulation be achieved?

Which among the following should be encapsulated?

Encapsulation helps in writing ___________ classes in java

Find which of the following uses encapsulation?

While using encapsulation, which among the following is possible?

If data members are private, what can we do to access them from the class object?

Which among the following best describes encapsulation?

If 2 classes derive one base class and redefine a function of base class, also overload some operators inside class body. Among these two things of function and operator overloading, where is polymorphism used?

Which among the following is not true for polymorphism?

For constructor overloading, each constructor must differ in _ and