Quarter 3 Final Exam: Functions and Parameters

Why do we write functions?

I. Make our code easier to understand by giving a readable name to a group of instructions

II. Avoid writing repeated code

III. Make our code reusable

• II and III

• I only

• I and II

• I, II, and III

In the following function printThreeTimes:

function printThreeTimes(word){

println(word);

println(word);

println(word);

}

What is the parameter of the function?

• printThreeTimes

• function

• word

• println

What is the output of the following program?

function start(){

var x = 5;

sumTo(x);

println(x);

}

function sumTo(num){

var sum = 0;

for(var i = 0; i <= num; i++){

sum += i;

}

println(sum);

}

• 5

  15

• 15

  5

• 5

• 15

How many parameters go into the function sum, and how many return values come out of the function sum?

function sum(first, second, third){

var result = first + second + third;

println(first);

println(second);

println(third);

return result;

}

• 3 parameters go in, 1 return value comes out

• 3 parameters go in, 3 return values come out

• 1 parameter goes in, 4 return values come out

• 1 parameter goes in, 1 return value comes out

What is printed by the following program?

function product(x, y){

return x * y;

}

function difference(x, y){

return x - y;

}

function start(){

var x = 2;

var y = 5;

var value1 = product(x, y);

var value2 = difference(y, x);

var result = difference(value1, value2);

println(result);

}

• -7

• 7

• 13

• -13

True or false: Functions should have parameters.

• True

• False

Which statement allows us to return values from functions?

• break

• return

• while

• function

What is the purpose of a return statement in a function?

• Returns the value and stops the executing the program

• Stops executing the function and returns the value

• Returns the program back to the start of the function and continues to execute statements

• Returns the value and continues executing rest of the statements, if there are any

Which of the following type of variable is visible everywhere in your code?

• global

• local

• integer

• string

Consider the following code snippet. What is returned and printed for the value of a?

function start(){

var a = mystery(10, 14);

var b = mystery(82, 28);

println(a);

println(b);

}

function mystery(x, y) {

if (x < y){

return x;

}else{

return y;

}

}

• 10

• 14

• 28

• 82