Java facts & stats

Question 1

Are Java and JavaScript the same programming language?

Accepted Answer

No, they are different languages. Despite similar names, Java and JavaScript are separate languages with different designs and uses.

Question 2

What is the name of the method where a standard Java application starts running?

Accepted Answer

main. A Java application begins at 'public static void main(String[] args)'.

Question 3

What does JVM stand for?

Accepted Answer

Java Virtual Machine. The JVM runs compiled Java programs, which lets the same program work on different operating systems.

Question 4

How many bits does Java's primitive int type use?

Accepted Answer

32. A Java int is always 32 bits, with values from about −2.1 billion to 2.1 billion.

Question 5

What was the Java language originally called during its development?

Accepted Answer

Oak. The language was first named Oak, reportedly after a tree outside the lead developer's office, before becoming Java.

Question 6

Which Java keyword stops a variable from being reassigned after it has been given a value?

Accepted Answer

final. A final variable can be assigned only once; 'const' is reserved in Java but not actually used.

Question 7

How many bits does Java's char type use?

Accepted Answer

16. A Java char is a 16-bit UTF-16 code unit, so it can hold values from 0 to 65,535.

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