Lec 6: Methods

Question 1

Define a method

Answer 1

A collection of statements that are grouped together to perform an operation

Question 2

Define a method’s signature

Answer 2

the combination of the method name and the parameter list
ex: max(a,b)

Question 3

Define formal parameters

Answer 3

vars defined in the method header are known as formal parameters
ex: max(a,b)…a and b are formal parameters

Question 4

Define actual parameters

Answer 4

same as argument for a method

Question 5

What is the difference between instance and static methods

Answer 5

Instance methods can only be invoked from a specific instance or class, the syntax being referenceVar.methodName(args)
ex: message.length();

Static methods can be invoked without using an object
ex: Math.abs(x); and NOT x.abs();

Question 6

True or false: The switch check var can be a double

Answer 6

False; switch var cannot be a float-point number

Question 7

Define local variables

Answer 7

A variable defined inside a method

Question 8

True or false: A local variable must be declared before it can be used

Answer 8

True

Question 9

True or false: You can declare a local variable with the same name multiple times in a the same nested blocks

Answer 9

False

Question 10

Define “stepwise refinement”

Answer 10

The process of improving code piece by piece and to decompose bigger problems into smaller ones