What This Is

Six exam-style questions on values, assignment and arithmetic. Some are written in Lua and some in exam notation, and nothing tells you which is coming — the same as in May.

Set a timer for 10 minutes. Work them out on paper and do not run the code. Mark each answer sure or unsure. Guess rather than leave a blank; the AP exam has no penalty for a wrong answer.

The Questions

Question 1

What does this display?

x ← 5
x ← x + 3
DISPLAY(x)

• (A) 5
• (B) 8
• (C) 53
• (D) Nothing; a name cannot appear on both sides

Question 2

What does this print?

print("Score: " .. 3 + 4)

• (A) Score: 34
• (B) Score: 7
• (C) Score: 3 4
• (D) An error

Question 3

23 MOD 4 evaluates to:

• (A) 5
• (B) 5.75
• (C) 3
• (D) 4

Question 4

19 / 4 evaluates to:

• (A) 4
• (B) 4.75
• (C) 5
• (D) 3

Question 5

The person types 12. Which of the following is true?

io.write("How many? ")
local n = io.read()

• (A) n * 3 raises an error
• (B) n == 12 evaluates to true
• (C) n * 3 evaluates to 36
• (D) n holds the number 12

Question 6

What does this display?

DISPLAY("A")
DISPLAY("B")

• (A) AB
• (B) A and B on two lines
• (C) A B on one line
• (D) An error; DISPLAY can only be used once

Submit

Hand in your six answers with sure or unsure beside each, and your time.

The unsure marks are the useful part. A right answer you were unsure of is a topic to revisit; a wrong answer you were sure of is a bigger one.

Worth 4 points, graded on completion.