AP Computer Science - Methods and Loops Quiz

Hello Everyone!
It has been a month since I have posted, so today I am going to celebrate my 1000 followers by posting this and making a new logo and celebration post. Today's lesson for CS includes my most recent quiz and the solutions I typed out with the class. Any teachers that wish to use it may very well do so! Best wishes to all of you! I hope you enjoy!

Number 1

What is the output of the following subcode:
int x = 1; while (x < 50) { x *= 2 } System.out.print(x + “is the output.”);

Number 2

How many times does the inner while loop execute?
int j = 0, x = 0;
while ( j++ < 100 ) {
int k = 100;
while ( k - - > 0 ) {
x++;
}
}

Number 3

Write a loop that simulates a countdown from 60 seconds down to zero. Your product should output: Countdown: 60… 59… 58… (and so on to)… Blast-off!

Number 4

Write a main method that asks the user for the side length of a square, prints the perimeter, and prints the area. Use two helper methods that calculate perimeter and area. Do not do it in the main method.

Number 5

Consider the following method and fill in the blank (//Your Code):
public void arithmetic (int a1, int d, int an) { // Your Code }
Implement a code that mimics the following examples:
arithmetic (3,5,40) would print 3 8 13 18 23 28 33 38
arithmetic (-10, 7, 25) would print -10 -3 4 11 18 25