1z0-808 Free Practice Test

Given:
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1. A. An exception is thrown at runtime.
2. B. InitializedStartedInitialized
3. C. InitializedStarted
4. D. Compilation fails.

Correct Answer: D

Given the code fragment:
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1. A. Replace line 6 with System.out.print (--x);
2. B. At line 7, insert x --;
3. C. Replace line 5 with while (is Available(--x)) {
4. D. Replace line 12 with return (x > 0) ? false : true;

Correct Answer: C

What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class?

1. A. Encapsulation
2. B. Inheritance
3. C. Abstraction
4. D. Instantiation
5. E. Polymorphism

Correct Answer: A
Using the private modifier is the main way that an object encapsulates itself and hide data from the outside world.

You are asked to develop a program for a shopping application, and you are given this information:
< > >< > >< > >>< >

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

Correct Answer: A

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