Quiz on Java

Which of the following is a type of polymorphism in Java?

• Compile time polymorphism

• Execution time polymorphism

• Multiple polymorphism

• Multilevel polymorphism

Which component is used to compile, debug and execute java program?

• JVM

• JDK

• JIT

• JRE

Syntax to compile java program from command prompt

• java Filename.java

• javac Filename

• javac Filename.java

• java Filename

Which component is responsible for converting bytecode into machine specific code?

• JVM

• JDK

• JIT

• JRE

Which of the following is not a valid Java comment?

• /** Comment 1 */

• */ Comment 2 /*

• // Comment 3

• /* Comment 4 */

When saving a Java source file, save it with an extension of

• .java.

• .javac.

• .src.

• .class.

Which of the following is not a rule that must be followed when naming identifiers?

• After the first character, you may use the letters a-z, A-Z, an underscore, a dollar sign, or digits 0-9.

• Identifiers can contain spaces.

• Uppercase and lowercase characters are distinct.

• The first character must be one of the letters a-z, A-Z, an underscore or a dollar sign.

To print "Hello, world" on the monitor, use the following Java statement:

• System.out.println("Hello, world");

• System Print = "Hello, world";

• SystemOutPrintln('Hello, world');

• system.out.println{Hello, world};

Which company owns Java?

• Oracle

• Microsoft

• Google

• Apple

• Intel

Who invented Java?

• James Gosling

• Sergey Brin

• Steve Jobs

• Bill Gates

• Tim Berners-Lee