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.

none of these is correct

generator.nextInt(7)-3

generator.nextInt(6)-3

generator.nextInt(8)-3

generator.nextInt(7)-2;

generator.nextInt(6)-4

generator.nextInt(7)-4

generator.nextInt(8)-2

generator.nextInt(8)-4

generator.nextInt(6)-2

2.

values is the following int array:

3

17

2

22

9

7

6

What is values[4]?

3

22

9

2

17

7

6

None of these is correct.

3.

values is the following int array:

3

17

2

22

9

7

6

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

output nothing

output 6

cause an ArrayoutOfBoundsException to be thrown (crashing the program)

cause a syntax (compile-time) error

output 7

4.

values is the following int array:

3

17

2

22

9

7

6

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

for (j=1; j

for (j=0; j

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

for (j=0; j

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

5.

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

True

False

6.

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

True

False

7.

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

True

False

8.

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

has-a

is-a

was-a

instance-of

uses-a

9.

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

Any class I write classes can have 0 or 1 parent classes and any number of child classes.

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

Any class I write must have 1 parent class and may have at most a single child class.

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

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