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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 896 · 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.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
  2. 2.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 280; // 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 2 (b) line 3 (c) line 4 (d) line 1
  3. 3.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) a beep sound (d) speaking a command
  4. 4.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 2 (c) line 1 (d) line 4
  6. 6.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  7. 7.⚙️ What number does this app show?
    let bill = 296; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  8. 8.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 340; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 4 (b) line 1 (c) line 3 (d) line 2
  9. 9.True or false: speaking a command is processing. (a) False (b) True
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 4; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 2 (c) line 1
  11. 11.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // 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 3 (b) line 1 (c) line 2 (d) line 4
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 140; // typed by the user
    line 2: let off = 50; // 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
  14. 14.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  15. 15.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 590; // typed by the user
    line 2: let off = 30; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 1 (b) line 3 (c) line 2 (d) line 4
  17. 17.True or false: adding up a bill is an output. (a) False (b) True
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 13; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  19. 19.True or false: sorting the scores is an input. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) taking a photo (d) a beep sound
  21. 21.Which of these is processing? (a) adding up a bill (b) a result on screen (c) tapping a button (d) a beep sound
  22. 22.True or false: speaking a command is an input. (a) True (b) False
  23. 23.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 1 (b) line 2 (c) line 3 (d) line 4
  25. 25.⚙️ What number does this app show?
    let price = 550; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  26. 26.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
  27. 27.Which of these is an output? (a) working out a tip (b) tapping a button (c) a result on screen (d) speaking a command
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 590; // typed by the user
    line 2: let off = 50; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 1 (c) line 2 (d) line 3
  29. 29.Which of these is processing? (a) a beep sound (b) typing your age (c) working out a tip (d) speaking a command
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 2 (c) line 3
  31. 31.⚙️ What number does this app show?
    let bill = 84; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  32. 32.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // typed by the user
    line 2: let qty = 6; // 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
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 152; // 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 3 (b) line 4 (c) line 2 (d) line 1
  35. 35.True or false: typing your age is an input. (a) True (b) False
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 108; // 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 3 (b) line 1 (c) line 2 (d) line 4
  37. 37.True or false: a result on screen is an input. (a) False (b) True
  38. 38.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  39. 39.True or false: taking a photo is processing. (a) True (b) False
  40. 40.⚙️ What number does this app show?
    let price = 250; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);

Answer key

  1. processing
  2. line 3
  3. speaking a command
  4. input
  5. line 3
  6. 105
  7. 74
  8. line 3
  9. False
  10. line 2
  11. output
  12. line 3
  13. line 3
  14. 280
  15. 3000
  16. line 3
  17. False
  18. line 2
  19. False
  20. a beep sound
  21. adding up a bill
  22. True
  23. 140
  24. line 3
  25. 540
  26. output
  27. a result on screen
  28. line 3
  29. working out a tip
  30. line 2
  31. 28
  32. output
  33. line 3
  34. line 3
  35. True
  36. line 3
  37. False
  38. 275
  39. False
  40. 200

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