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Mphasis Abstraction and Encapsulation Quiz 1

Question 1

Time: 00:00:00

Which of the following is not an OOPs Concept ?

Encapsulation

Inheritance

Polymorphism

Exception Handling

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Exception handling is not a part of OOPs concept.Hence option(D) is the correct option.

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Question 2

Time: 00:00:00

In OOPs, Wrapping up of data into a single unit is known as ?

Encapsulation

Inheritance

Abstraction

Polymorphism

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Wrapping up of data into a single unit is known as encapsulation.

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Question 3

Time: 00:00:00

IS-A relationship is also known as ?

Aggregation

Encapsulation

Inheritance

Composition

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An IS-A relationship is inheritance. The classes which inherit are known as sub classes or child classes. On the other hand, the HAS-A relationship is composition. In OOP, the IS-A relationship is completely inherited.

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Question 4

Time: 00:00:00

How many types of polymorphism are there in OOPs?

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There are two types of polymorphism in OOPs:

Runtime Polymorphism 2. Compile-time Polymorphism

Runtime Polymorphism: It is meet by the function overriding. This polymorphism is also known as late or dynamic binding.

Compile-time Polymorphism: It is meet by the operator and function overloading. This polymorphism is also known as early or static binding.

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Question 5

Time: 00:00:00

Using the concept of encapsulation security of the data is

Ensured to some extent

Purely ensured

Not ensure

Very low

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The concept of encapsulation can only ensure data security to some extent.

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Question 6

Time: 00:00:00

Which of the following is false about an interface?

An interface can extend another interface

An interface can implement another interface

A class which is implementing an interface must implement all the methods of the interface

An interface is a solution for multiple inheritance in java.

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An interface can extend another interface but it cannot implement another interface.Hence option (B) is false.

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Question 7

Time: 00:00:00

Does OOP provide better security than POP?

Always true for any programming language

It’s depend on the type of the program.

May not be true with respect to all programming languages

It’s vice versa is true.

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It is always true as we have the facility of private and protected access specifiers. Also, only the public and global data are available globally or else the program should have proper permission to access the private data.

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Question 8

Time: 00:00:00

The subclass constructor uses the______keyword to invoke the constructor of the superclass.

Super

Final

Static

Public

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Super keyword is used by the subclass for invoking the superclass constructor.

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Question 9

Time: 00:00:00

_____ is used to declare and initialize an object from another object of same class in C++

Copy constructor

Overloaded constructor

Non-parameterized constructor

Default constructor

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A copy constructor is a member function that initializes an object using another object of the same class.

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Question 10

Time: 00:00:00

______feature supports reusability and extensibility of classes.

Overloading

Inheritance

Overriding

Polymorphism

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Features of reusability and extensibility is supported by inheritance so the correct answer is inheritance.

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