1z0-808 Free Practice Test

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 the code fragment:

What is the result?

1. A. Sum is 600
2. B. Compilation fails at line n1.
3. C. Compilation fails at line n2.
4. D. A ClassCastException is thrown at line n1.
5. E. A ClassCastException is thrown at line n2.

Correct Answer: C

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

Which statement best describes encapsulation?

1. A. Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects.
2. B. Encapsulation ensures that classes can be designed so that their methods are inheritable.
3. C. Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.
4. D. Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method.

Correct Answer: A

Given:

And given the code fragment: Book book1 = new EBook(); book1.readBook();
Which option enables the code to compile?

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

Correct Answer: D