Methods

Question 1

What is not an acceptable method declaration?

Answer 1

public static void doWork(int number, void thing) {

}

Question 2

A user calls a method with the following syntax:

doSomething(3,”Hello”);
What could represent the Java method signature for the method they are calling?

Answer 2

public static void doSomething(int number, String text) {
//some code
}

Question 3

What lines of code could be added to the following method to make it semantically and syntactically correct?

public static double someMethod(){

int a = 5;
double b = 5.0;
String c = "5";
char d = '5';

}

Answer 3

return b

Question 4

The code below shows a method declaration and a call to that method.

public static int doSomething(int number){
return “’“+number+”’”;
}

String x = doSomething(5);

There is an error. What single change could resolve the error?

Answer 4

Change the method’s return type.

Question 5

True or False?
The type of a variable passed into a method must match the type of the corresponding parameter in the method declaration.

Answer 5

True

Question 6

True or False?
The name of a variable passed into a method must match the name of the corresponding parameter in the method declaration.

Answer 6

False

Question 7

Can a method omit a return statement?

Answer 7

Yes, when the method’s return type is void

Question 8

What is the correct type for a method that does not return a value?

Answer 8

Void