JAVA related questions. 1. Which of the following statements will generate a ran

Question

JAVA related questions.

1.

Which of the following statements will generate a random number between -3 and 3 (inclusive). You can assume there is a Random object called generator.

generator.nextInt(6)-2

2.

values is the following int array:

What is values[4]?

None of these is correct.

3.

values is the following int array:

The statement System.out.println(values[7]); will

output 7

4.

values is the following int array:

What loop will add 1 to each element stored in values?

for (j=1; j<=values.length; j++) { values[j]++; }

5.

A class can contain both static and instance (non-static) variables.

False

6.

Within a class, you can invoke (call) a static method directly from within a non-static(instance) method.

False

7.

Java allows you use an abstract class or an interface as the declared type of an object.

False

8.

The relationship between a child and a parent class is referred to as a/an _____ relationship.

uses-a

9.

Which of the following is true regarding every Java class that you create from scratch?

Any class I write must have 1 child class but may have any number of parent classes.

Explanation / Answer

Question1

Answer:

generator.nextInt(7)-3

Question 2

Answer:

9

Question 3

Answer:

cause an ArrayoutOfBoundsException to be thrown (crashing the program)

Question 4

Answer:

for (j=0; j<values.length; j++) { values[j]++; }

Question 5

Answer:

True

Question 6

Answer:

False

Question 7

Answer:

False

Question 8

Answer:

is-a

Question 9

Answer:

Any class I write can have any number (0 or more) of parent classes and any number (0 or more) of child classes.

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