Drawing AND as two decisions in a row

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Quick Questions

Shade in the A or B circle for each question.

1. A flowchart shows IF age >= 13 AND hasParentOK = TRUE. How many decision diamonds does it need?

A One diamond that holds both conditions side by side

B Two diamonds, one for each condition

2. In a flowchart for IF A AND B, which path from the first diamond leads to the second diamond?

A The Yes path

B The No path

3. In a flowchart for IF A AND B, when is the action reached?

A When either diamond gives Yes

B Only when the first is Yes and then the second is Yes

4. The first diamond (A) gives No. Where does the flow go in an AND flowchart?

A Straight to the No step, skipping the second diamond

B On to the second diamond to check B anyway

5. Where do the two No exits lead in a flowchart for IF A AND B?

A Both lead to the same next step

B Each leads to its own separate step

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1IF age >= 13 AND hasPermission = TRUE		AThe paths are swapped. A student who fails the first test still gets checked again, and passing the first test skips the second test.
2Diamond 1 No path and Diamond 2 No path both point to the same box		BTwo decisions in a row in a flowchart: the first checks age, and only its Yes path leads to the permission check.
3Only Yes then Yes reaches the action, which matches a single AND condition in pseudocode		CIF temp > 20 AND raining = FALSE THEN OUTPUT "Go to the oval" ENDIF
4The second diamond is only reached when the first answer is Yes, so the two tests sit in a row		DWhichever test fails, the flow carries on to the same next step, so the action is skipped either way.
5Diamond 1 Yes goes to the action, Diamond 2 is drawn beside it with its own Yes also going to the action		EIF score >= 50 AND attendance >= 80 THEN OUTPUT "Pass" ENDIF
6Diamond 1 No goes to the second diamond, and Diamond 1 Yes goes to the action		FThis draws OR, not AND. Either diamond can reach the action by itself, so only one condition has to be true.

Definitions

IF A AND B

Fill in the Blanks

Complete each line of code by filling in the missing parts.

IF age >= 13 ___ parent = "Yes" THEN DISPLAY "Join" ENDIF

IF score >= 50 AND attendance >= 80 ____ DISPLAY "Pass" ENDIF

IF raining = "No" AND temp _ 15 THEN DISPLAY "Picnic" ENDIF

IF age >= 13 THEN __ parent = "Yes" THEN DISPLAY "Join"

IF hasTicket = "Yes" AND seats > 0 THEN DISPLAY "Enter" _____

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A D1: age >= 13?

B D1 Yes -> Enter

C D1 No -> Skip

D D2: hasTicket = TRUE?

E D2 Yes -> Enter

F D2 No -> Skip

Question 2

A D1: member = TRUE?

B D1 Yes -> D2

C D1 No -> Discount

D D2: spend > 50?

E D2 Yes -> Discount

F D2 No -> Full price

Question 3

A IF raining OR cold THEN

B OUTPUT "Take a coat"

C ENDIF

Question 4

A D1: score >= 50?

B D1 Yes -> D2

C D1 No -> D2

D D2: attendance >= 80?

E D2 Yes -> Pass

F D2 No -> Fail

Question 5

A D1: temp > 30?

B D1 Yes -> D2

C D1 No -> Stay home

D D2: temp > 30?

E D2 Yes -> Go swim

F D2 No -> Stay home

Answer Key

Drawing AND as two decisions in a row

Section A: Quick Questions

B — Two diamonds, one for each condition

A — The Yes path

B — Only when the first is Yes and then the second is Yes

A — Straight to the No step, skipping the second diamond

A — Both lead to the same next step

Section B: Match the Pairs

IF age >= 13 AND hasPermission = TRUE → Two decisions in a row in a flowchart: the first checks age, and only its Yes path leads to the permission check.

Diamond 1 No path and Diamond 2 No path both point to the same box → Whichever test fails, the flow carries on to the same next step, so the action is skipped either way.

Only Yes then Yes reaches the action, which matches a single AND condition in pseudocode → IF score >= 50 AND attendance >= 80 THEN OUTPUT "Pass" ENDIF

The second diamond is only reached when the first answer is Yes, so the two tests sit in a row → IF temp > 20 AND raining = FALSE THEN OUTPUT "Go to the oval" ENDIF

Diamond 1 Yes goes to the action, Diamond 2 is drawn beside it with its own Yes also going to the action → This draws OR, not AND. Either diamond can reach the action by itself, so only one condition has to be true.

Diamond 1 No goes to the second diamond, and Diamond 1 Yes goes to the action → The paths are swapped. A student who fails the first test still gets checked again, and passing the first test skips the second test.

Section C: Definitions

IF A AND B — In a flowchart, AND is two diamonds in a row: only Yes then Yes reaches the action, and a No from either diamond goes to the same next step.

Section D: Fill in the Blanks

IF age >= 13 AND parent = "Yes" THEN
  DISPLAY "Join"
ENDIF

IF score >= 50 AND attendance >= 80 THEN
  DISPLAY "Pass"
ENDIF

IF raining = "No" AND temp > 15 THEN
  DISPLAY "Picnic"
ENDIF

IF age >= 13 THEN
  IF parent = "Yes" THEN
    DISPLAY "Join"

IF hasTicket = "Yes" AND seats > 0 THEN
  DISPLAY "Enter"
ENDIF

Section E: Spot the Error

B — AND is two diamonds in a row. A Yes from D1 must lead on to D2 so the second condition is checked too. Going straight to Enter skips D2. It should be D1 Yes -> D2.

C — A No from either diamond must go to the same next step. D1 No should go to Full price, like D2 No. A No can never reach the Discount action.

A — Two diamonds in a row are drawn from IF A AND B. OR would let either condition alone reach the action. It should be IF raining AND cold THEN.

C — Only the Yes path of D1 may lead to D2. If a No also goes to D2, a student could still reach Pass after failing the first test. D1 No should go to Fail.

D — The second diamond must test the second condition (sunny = TRUE). Repeating the temp test means the sunny part of A AND B is never checked.