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Oracle Java SE 8 Programmer I Sample Questions (Q14-Q19):

NEW QUESTION # 14
Which three are valid replacements for foo so that the program will compiled and run?
public class ForTest {
public static void main(String[] args) {
int[] arrar = {1,2,3};
for ( foo ) {
}
}
}

A. int i: array
B. ;;
C. int i = 0; i < 1; i++
D. ; i < 1; i++
E. ; i < 1;

Answer: A,B,C

NEW QUESTION # 15
Given this class:

Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

A. Call the setArea method at the end of the setLength method.
B. Call the setArea method at the beginning of the setLength method.
C. Call the setArea method at the end of the setHeight method.
D. Change the area field to public.
E. Call the setArea method at the beginning of the setHeight method.
F. Change the setArea method to private.

Answer: C,F

NEW QUESTION # 16
Given:

What is the result?

A. false, false
B. false, true
C. true, true
D. true, false

Answer: B

NEW QUESTION # 17
Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?

A. Class C implements X, Y extends B { }
B. Class C extends B implements X, Y { }
C. Class C implements Y extends B { }
D. Class C extends A implements X { }
E. Class C extends A, B { }

Answer: B,D

Explanation:
extends is for extending a class.
implements is for implementing an interface. Java allows for a class to implement many interfaces.

NEW QUESTION # 18
Which statement is true about Java byte code?

A. It can run on any platform that has the Java Runtime Environment.
B. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.
C. It can run on any platform.
D. It can run on any platform only if it was compiled for that platform.
E. It can run on any platform that has a Java compiler.

Answer: A

Explanation:
We are talking about byte code so the Java program has been compiled.
The question ask for what we need to run the byte code.
https://www.java.com/en/download/faq/whatis_java.xml
http://www.researchgate.net/post/Run_Java_Application_Without_Installing_Java_Runtime

NEW QUESTION # 19
......

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