JAVA CONCEPTS

Important Java Mcq 1

What is the biggest reason for the use of polymorphism?

a) It allows the programmer to think at a more abstract level

b) There is less program code to write

c) The program will have a more elegant design and will be easier to maintain and update

d) Program code takes up less space

Answer:

c) The program will have a more elegant design and will be easier to maintain and update

Explanation:

We can define polymorphism as the ability of a message to be displayed in more than one form. A real-life example of polymorphism is a person who at the same time can have different characteristics. Polymorphism allows for the implementation of elegant software.

The java compiler generates

a machine code b. byte code c. source code d. HTML Answer: b. byte code Explanation: The Java compiler generates byte code which is then

Which of the following statements is wrong about inheritance?

a) Protected members of a class can be inherited b) The inheriting class is called a subclass c) Private members of a class can be

Every Java application is composed of at least one?

a. Local variable b. Instance variable c. Public class declaration d. Imported class Answer: c. Public class declaration Explanation In any Java program there must

Which of the following best describes inheritance?

a) Ability of a class to derive members of another class as a part of its definition b) Means of bundling instance variables and methods