ch5

Question 1

What are the requirements for a switch expression?

Answer 1

It must evaluate to: char, byte, short, int, enum, String

Question 2

What are the requirements for a case expression?

Answer 2

Evaluate to the same type as the switch expression. Compile-time constant.

Question 3

Is String comparison for case expressions case-senitive?

Answer 3

Yes.

Question 4

How many variables can you declare in the declaration part of a for loop?

Answer 4

0, 1 or many. If you declare multiple variables: they must be of the same type, you have to separate them with a comma.

Question 5

How many conditional expressions can a basic for loop contain?

Answer 5

1

Question 6

What are the possible causes of abrupt loop termination?

Answer 6

break, return, System.exit()

Question 7

break dummy; What happens, if no label with the name dummy exists?

Answer 7

compile error

Question 8

Can you use try and finally without a catch block?

Answer 8

yes

Question 9

What happens if the code contains a try block without catch or finally?

Answer 9

compile error

Question 10

What happens if an exception is not caught at all?

Answer 10

The application stops running. The call stack will be printed to the output.

Question 11

Exceptions are always subclass of …?

Answer 11

java.lang.Exception

Question 12

java.lang.Exception is a subclass of …?

Answer 12

Throwable

Question 13

What can you use the throw keyword for?

Answer 13

Throwing anything which is instanceof Throwable

Question 14

What happens if you have a catch block for IOException above the catch block of FileNotFoundException?

Answer 14

compiler error