2019 Real Oracle OCA Java SE 1Z0-808 Exam Questions | DumpsBase

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Which two are benefits of polymorphism?

A. Faster code at runtime

B. More efficient code at runtime

C. More dynamic code at runtime

D. More flexible and reusable code

E. Code that is protected from extension by other classes

Answer: B,D

Which two statements are true?

A. Error class is unextendable.

B. Error class is extendable.

C. Error is a RuntimeException.

D. Error is an Exception.

E. Error is a Throwable.

Answer: B,C

Which statement best describes encapsulation?

A. Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects.

B. Encapsulation ensures that classes can be designed so that their methods are inheritable.

C. Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.

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.

Answer: A

Which three statements are true about exception handling?

A. Only unchecked exceptions can be rethrown.

B. All subclasses of the RuntimeException class are recoverable.

C. The parameter in a catch block is of Throwable type.

D. All subclasses of the RuntimeException class must be caught or declared to be thrown.

E. All subclasses of the Exception class except the RuntimeException class are checked exceptions.

F. All subclasses of the Error class are checked exceptions and are recoverable.

Answer: C,E,F

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