Following JAVA exam preparation tests has multiple choice questions (MCQ) and answers for online learning with MCQs on JAVA on topics in this student portal with order of importance as:

Overview of Java
Data Types, Variable and Arrays

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Two Paradgims
A Closer Look at first sample Program
Two Control Statements
A second short program
Compiling problem
Integers
Using Block Of Code
characters
A First Simple problem
java keywords
Lexical Issue
comments
separators
Inheritence
Encapsulation
For loop
floating point
Polymorphism