AP CSA Unit 4 Review

What's the output?

• 012345

• 0123456

• 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

  (Infinite loop)

• 12345

What's the output?

• 1

• 12

• 01

• 12345

Re-write this for-loop as a while loop

Answer explanation

Which of these nested loops will print out the following output?

• 
• 
• 

What prints when we run the main method? 

• AP

  CSA

  CSA

• AP

  AP

  CSA

  CSA

  CSA

• AP

  AP
  AP

  CSA
  CSA
  CSA
  CSA

• APAPCSACSACSA

Complete the code so that it prints every third character in String s, starting at the 1st character.

Ex: If s="ABCDEF", print "AD"

Answer explanation

Complete this code so that it prints a triangle as follows:

0

01

012

0123

Answer explanation

The length of each line is determined by the variable i.

The length of each line should increase from 0 to 3.

Rewrite this code so that it prints the triangle upside down:

0123​

012​

01​

0

Answer explanation

The length of each line is determined by the variable i.

Change the outer loop to down from 3 to 0.

Write a nested for-loop that prints out the following:

Answer explanation

There are 4 lines, so i should go from 4 to 1.

Each line counts down from i to 1, so the inner loop's counter variable j should go down from i to 1.

What will be the effect on the output if, in line 1, we replace

i < 5 with i <= 5 ?

• No change to the output

• Each line will be one character longer

• Each line will be one character longer AND there will be one more line of output

• There will be one more line of output