ch += 2 is equivalent to

1. ch = ch + 2
2. ch + 2
3. ch =+ 2
4. none of the above

The Math class is part of which Java library package.

1. java.util
2. java.io
3. java.random
4. java.lang

Absence of which statement causes a fall-through in a switch statement.

1. continue
2. break
3. stop
4. fall

By default, the if-part and else-part of an if statement can contain these many statements in it.

1. 2
2. 1
3. 5
4. as many