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(ii) Java code is:
a. Compiled and interpreted b. Only compiled
c. Only Interpreted d. Translated
(iii) Java source code is compiled to produce:
a. Object code b. Byte code
c. Final code d. Machine code
(iv) JVM is an/a:
a. Interpreter b. Compiler
c. Intermediate code d. High-level language
Ans. (i) c (ii) a (iii) b (iv) a
5. Name any two basic principles of object-oriented programming. [2019]
Ans. Two basic principles of object-oriented programming are Encapsulation and Inheritance.
6. Define data abstraction. [2018]
Ans. Data abstraction is the property by which the essential features are shown without knowing the background details.
7. What is inheritance? [2017]
Ans. Inheritance is the process of using the properties of a class in another class. It allows you to use the attributes and behaviour of
a class into another class.
8. Define encapsulation. [2016]
Ans. Encapsulation is one of the basic concepts in object-oriented programming. The wrapping up of data members and member
methods together into a single unit is called encapsulation.
9. State the Java concept that is implemented through: [2013]
i. a superclass and a subclass.
ii. the act of representing essential features without including background details.
Ans. i. Inheritance ii. Abstraction
2424 Touchpad Computer Applications-X

