Java 8 SE OCA 1Z0 808 Exam dumps

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Share some Java and Middleware 1Z0-808 exam questions and answers below.
Which two class definitions fail to compile?

A. abstract class A3 {private static int i;public void doStuff(){}public A3(){}}

B. final class A1 {public A1(){}}

C. public class A2 {private static int i;private A2(){}}

D. class A4 {protected static final int i;private void doStuff(){}}

E. final abstract class A5 {protected static int i;void doStuff(){}abstract void doIt();}

Answer: C,E

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 the structure of a Java class?

A. A public class must have a main method.

B. A class can have only one private constructor.

C. A method can have the same name as a field.

D. A class can have overloaded static methods.

E. The methods are mandatory components of a class.

F. The fields need not be initialized before use.

Answer: A,C,E

Given the code fragment:

int[] array = {1, 2, 3, 4, 5};

And given the requirements:

1. Process all the elements of the array in the order of entry.

2. Process all the elements of the array in the reverse order of entry.

3. Process alternating elements of the array in the order of entry.

Which two statements are true?

A. Requirements 1, 2, and 3 can be implemented by using the enhanced for loop.

B. Requirements 1, 2, and 3 can be implemented by using the standard for loop.

C. Requirements 2 and 3 CANNOT be implemented by using the standard for loop.

D. Requirement 1 can be implemented by using the enhanced for loop.

E. Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop.

Answer: D,E

Which statement will empty the contents of a StringBuilder variable named sb?

A. sb. deleteAll ();

B. sb. delete (0, sb. size () );

C. sb. delete (0, sb. length () );

D. sb. removeAll ();

Answer: C

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