Question

I need help with 3 - 6, 9 & 10

QUESTION 3

To call a static method you first need to create an instance of a class.

True

False

QUESTION 4

If a field is static, it gets copied to all instances of that class

True

False

QUESTION 5

A static method can call an instance method

True

False

QUESTION 6

When a method receives an object as an argument, the method can change the values of its fields.

True

False

QUESTION 9

Consider the following source code;

Stock stock1 = new Stock( "XIV", 119.5 );

Stock stock2 = stock1;

The variable stock2 points to a copy of the stock1 instance.

True

False

QUESTION 10

You can't have an instance of a class to be a field of another class.

True

False

Answer 1

QUESTION 3

To call a static method you first need to create an instance of a class.
Answer: False (Static method can be called directly using the name of the class,

QUESTION 4

If a field is static, it gets copied to all instances of that class
Answer: True (only one copy of static variable is created, which is present in all instances)

QUESTION 5

A static method can call an instance method
Answer: True (A static method can call an instance method using the instance)

QUESTION 6
When a method receives an object as an argument, the method can change the values of its fields.
Answer: True(A reference to the address of the object is passed, and the changes are permanent)

QUESTION 9

Consider the following source code;

Stock stock1 = new Stock( "XIV", 119.5 );

Stock stock2 = stock1;

The variable stock2 points to a copy of the stock1 instance.
Answer: False(Variable stock2 points to same object as stock1)

QUESTION 10

You can't have an instance of a class to be a field of another class.
Answer: False(This is called an association)