Java Proficiency Questions

Novice/Intermediate

1. Which of the following is not a Java keyword?

a. public
b. static
c. class
d. interface
e. const

Intermediate/Expert

1. Consider the following Java snippet

StringBuffer sb = new StringBuffer(“123″);
doSomething(sb);
doSomethingElse(sb);

private void doSomething(StringBuffer s)
{
s.append(“4″);
}

private void doSomethingElse(StringBuffer s)
{
s = new StringBuffer(“abc”);
}

what will be contained in sb before doSomething, after doSomething, and after doSomethingElse

a. 123, 123, 123
b. 123, 1234, abc
c. 123, 123, abc
d. 123, 1234, 1234