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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 306 · 40 questions
TalentJR

Developer's tip (In, work, out): Input → processing → output. Input: typing, tapping, a photo, your voice. Output: a result on screen, a sound, a buzz, a pop-up. In code, the processing line works out a new value from the inputs; show() is the output.

NameDateTime takenScore ___ / 40
  1. 1.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 93; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 2 (b) line 3 (c) line 4 (d) line 1
  2. 2.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 270; // typed by the user
    line 2: let off = 10; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 3 (b) line 1 (c) line 2 (d) line 4
  3. 3.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  4. 4.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) processing (c) output
  5. 5.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
  6. 6.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
  7. 7.True or false: a beep sound is an input. (a) False (b) True
  8. 8.True or false: checking a password is processing. (a) False (b) True
  9. 9.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 272; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 4 (b) line 1 (c) line 2 (d) line 3
  10. 10.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  11. 11.True or false: typing your age is an output. (a) True (b) False
  12. 12.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  13. 13.⚙️ What number does this app show?
    let bill = 46; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  14. 14.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 204; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 2 (b) line 4 (c) line 3 (d) line 1
  16. 16.Which of these is an input? (a) a pop-up message (b) a result on screen (c) speaking a command (d) a beep sound
  17. 17.Which of these is an output? (a) adding up a bill (b) typing your age (c) a pop-up message (d) tapping a button
  18. 18.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
  19. 19.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  20. 20.Which of these is an input? (a) a pop-up message (b) tapping a button (c) a beep sound (d) checking a password
  21. 21.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 590; // typed by the user
    line 2: let off = 40; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 1 (c) line 3 (d) line 2
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 130; // typed by the user
    line 2: let off = 40; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 2 (b) line 1 (c) line 4 (d) line 3
  24. 24.⚙️ What number does this app show?
    let price = 530; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 1 (b) line 4 (c) line 2 (d) line 3
  26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 144; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 1 (b) line 4 (c) line 2 (d) line 3
  27. 27.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) processing (c) output
  28. 28.True or false: a beep sound is processing. (a) True (b) False
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 2 (b) line 1 (c) line 4 (d) line 3
  30. 30.Which of these is processing? (a) checking a password (b) a result on screen (c) a buzz (vibration) (d) a pop-up message
  31. 31.Which of these is an input? (a) sorting the scores (b) checking a password (c) taking a photo (d) adding up a bill
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 3 (c) line 1
  33. 33.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
  34. 34.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 3 (c) line 2 (d) line 1
  36. 36.True or false: a pop-up message is an output. (a) True (b) False
  37. 37.🔍 Which is the odd one out? (a) taking a photo (b) a beep sound (c) typing your age (d) tapping a button
  38. 38.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 1 (b) line 4 (c) line 2 (d) line 3
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // typed by the user
    line 2: let qty = 3; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 3 (b) line 1 (c) line 4 (d) line 2

Answer key

  1. line 3
  2. line 3
  3. 210
  4. input
  5. processing
  6. 2000
  7. False
  8. True
  9. line 3
  10. 270
  11. False
  12. 4000
  13. 23
  14. output
  15. line 3
  16. speaking a command
  17. a pop-up message
  18. 6000
  19. 195
  20. tapping a button
  21. 9000
  22. line 3
  23. line 3
  24. 520
  25. line 3
  26. line 3
  27. input
  28. False
  29. line 3
  30. checking a password
  31. taking a photo
  32. line 2
  33. output
  34. processing
  35. line 3
  36. True
  37. a beep sound
  38. 160
  39. line 3
  40. line 3

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