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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 455 · 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 = 92; // 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 3 (c) line 1 (d) line 2
  2. 2.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  3. 3.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  4. 4.Which of these is an output? (a) checking a password (b) sorting the scores (c) a result on screen (d) speaking a command
  5. 5.🔍 Which is the odd one out? (a) a buzz (vibration) (b) tapping a button (c) a beep sound (d) a pop-up message
  6. 6.⚙️ What number does this app show?
    let bill = 148; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  7. 7.True or false: taking a photo is processing. (a) True (b) False
  8. 8.True or false: adding up a bill is processing. (a) False (b) True
  9. 9.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
  10. 10.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) a result on screen (d) sorting the scores
  11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 360; // 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 1 (b) line 2 (c) line 3 (d) line 4
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 46; // 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 3 (d) line 2
  13. 13.Which of these is processing? (a) a pop-up message (b) typing your age (c) speaking a command (d) adding up a bill
  14. 14.🔍 Which is the odd one out? (a) working out a tip (b) taking a photo (c) typing your age (d) speaking a command
  15. 15.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 84; // 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
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  18. 18.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) input (c) output
  19. 19.True or false: checking a password is processing. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) a result on screen (d) tapping a button
  21. 21.Which of these is an input? (a) checking a password (b) a result on screen (c) taking a photo (d) working out a tip
  22. 22.⚙️ What number does this app show?
    let price = 170; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  23. 23.Which of these is an input? (a) typing your age (b) adding up a bill (c) a beep sound (d) working out a tip
  24. 24.⚙️ What number does this app show?
    let bill = 102; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  25. 25.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  26. 26.True or false: a buzz (vibration) is an output. (a) True (b) False
  27. 27.⚙️ What number does this app show?
    let price = 520; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  28. 28.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) taking a photo (d) a buzz (vibration)
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 350; // 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 3 (b) line 2 (c) line 4 (d) line 1
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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
  31. 31.⚙️ 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
  32. 32.True or false: sorting the scores is an input. (a) False (b) True
  33. 33.True or false: taking a photo is an input. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) working out a tip (b) sorting the scores (c) a pop-up message (d) adding up a bill
  35. 35.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output
  36. 36.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  37. 37.⚙️ What number does this app show?
    let bill = 110; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  38. 38.⚙️ What number does this app show?
    let bill = 292; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 114; // 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 4 (b) line 2 (c) line 3 (d) line 1
  40. 40.⚙️ What number does this app show?
    let price = 560; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);

Answer key

  1. line 3
  2. 4000
  3. 450
  4. a result on screen
  5. tapping a button
  6. 37
  7. False
  8. True
  9. 7000
  10. sorting the scores
  11. line 3
  12. line 3
  13. adding up a bill
  14. working out a tip
  15. processing
  16. line 3
  17. line 2
  18. input
  19. True
  20. a result on screen
  21. taking a photo
  22. 150
  23. typing your age
  24. 34
  25. 300
  26. True
  27. 500
  28. a buzz (vibration)
  29. line 3
  30. line 3
  31. line 2
  32. False
  33. True
  34. a pop-up message
  35. output
  36. 3000
  37. 55
  38. 73
  39. line 3
  40. 520

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