Set - 4

Question 1 :

What is null ?

Answer :

The null type has one value, the null reference, represented by the literal null, which is formed from ASCII characters. A null literal is always of the null type.

Question 2 :

What is object ?

Answer :

The principal building blocks of object-oriented programs. Each object is a programming unit consisting of data (instance variables) and functionality (instance methods). See also class.

Question 3 :

What is object-oriented design ?

Answer :

A software design method that models the characteristics of abstract or real objects using classes and objects.

Question 4 :

What is octal What is object-oriented design ?

Answer :

The numbering system using 8 as its base, using the numerals 0-7 as its digits. In programs written in the Java programming language, octal numbers must be preceded with 0. See also hexadecimal.

Question 5 :

What is optional packages ?

Answer :

The set or sets of APIs in a Java platform edition which are available with and may be supported in a compatible implementation. Over time, optional packages may become required in an edition as the marketplace requires them.