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Oracle Java SE 8 Programmer II Sample Questions (Q41-Q46):

NEW QUESTION # 41
Which two reasons should you use interfaces instead of abstract classes?

A. You expect that classes that implement your interfaces have many common methods or fields, or require access modifiers other than public.
B. You want to declare non-static on non-final fields.
C. You want to share code among several closely related classes.
D. You expect that unrelated classes would implement your interfaces.
E. You want to take advantage of multiple inheritance of type.

Answer: A,E

Explanation:
Explanation/Reference:
Reference: http://www.programmerinterview.com/index.php/java-questions/interface-vs-abstract-class/

NEW QUESTION # 42
Given the code fragment:

Assume that:
The required database driver is configured in the classpath. The appropriate database is accessible with the dbURL, userName, and passWord exists The Employee table has a column ID of type integer and the SQL query matches one record.
What is the result?

A. Compilation fails at line 14.
B. The code prints the employee ID.
C. The code prints Error.
D. Compilation fails at line 15.

Answer: B

NEW QUESTION # 43
Given the code fragment:

What is the result?

A. 0
B. Compilation fails
C. 1
D. AnArrayIndexOutOfBoundsException is thrown at runtime
E. 2

Answer: E

NEW QUESTION # 44
Given:
public interface Moveable<Integer> {
public default void walk (Integer distance) {System.out.println
("Walking");)
public void run(Integer distance);
}
Which statement is true?

A. Moveablecan be used as below:
Moveable animal = (Integer n) - > System.out.println(n);
animal.run(100);
Moveable.walk(20);
B. Moveablecan be used as below:
Moveable<Integer> animal = n - > n + 10;
animal.run(100);
animal.walk(20);
C. Movablecannot be used in a lambda expression.
D. Moveablecan be used as below:
Moveable<Integer> animal = n - > System.out.println("Running" + n);
animal.run(100);
animal.walk(20);

Answer: D

NEW QUESTION # 45
Given:
public enum USCurrency {
PENNY (1),
NICKLE(5),
DIME (10),
QUARTER(25);
private int value;
public USCurrency(int value) {
this.value = value;
}
public int getValue() {return value;}
}
public class Coin {
public static void main (String[] args) {
USCurrency usCoin =new USCurrency.DIME;
System.out.println(usCoin.getValue()):
}
}
Which two modifications enable the given code to compile? (Choose two.)

A. Remove the new keyword from the instantion of usCoin.
B. Nest the USCurrency enumeration declaration within the Coin class.
C. Add the final keyword in the declaration of value.
D. Make the getter method of value as a static method.
E. Make the USCurrency enumeration constructor private.

Answer: A,E

NEW QUESTION # 46
......

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