Which statement is true about the switch statement?

1. A. It must contain the default section.
2. B. The break statement, at the end of each case block, is optional.
3. C. Its case label literals can be changed at runtime.
4. D. Its expression must evaluate to a collection of values.

Correct Answer: B

Given:

What is the result?

1. A. Compilation fails.
2. B. false true
3. C. true false
4. D. true true
5. E. false false

Correct Answer: C

Given the code fragment:

What is the result?

1. A. A NullPointerException is thrown at runtim
2. B. [1, 2, 4]
3. C. [1, 2, 4, null]
4. D. [1, 3, 4, null]
5. E. [1, 3, 4]
6. F. Compilation fails.

Correct Answer: B

Which one of the following code examples uses valid Java syntax?

1. A. Option A
2. B. Option B
3. C. Option C
4. D. Option D

Correct Answer: A

Which two statements are true? (Choose two.)

1. A. Error class is unextendable.
2. B. Error class is extendable.
3. C. Error is a RuntimeException.
4. D. Error is an Exception.
5. E. Error is a Throwable.

Correct Answer: BC