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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 545 · 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.True or false: checking a password is processing. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) a beep sound (b) adding up a bill (c) working out a tip (d) sorting the scores
  3. 3.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) working out a tip (d) a buzz (vibration)
  4. 4.⚙️ What number does this app show?
    let bill = 240; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  5. 5.Which of these is processing? (a) a result on screen (b) a beep sound (c) a buzz (vibration) (d) adding up a bill
  6. 6.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
  7. 7.Which of these is an input? (a) a buzz (vibration) (b) taking a photo (c) adding up a bill (d) a pop-up message
  8. 8.⚙️ 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
  9. 9.⚙️ What number does this app show?
    let bill = 48; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  10. 10.Which of these is an output? (a) taking a photo (b) checking a password (c) a result on screen (d) typing your age
  11. 11.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
  12. 12.True or false: sorting the scores is an output. (a) False (b) True
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 280; // 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 4 (b) line 1 (c) line 3 (d) line 2
  14. 14.Which of these is processing? (a) a buzz (vibration) (b) a pop-up message (c) typing your age (d) checking a password
  15. 15.⚙️ What number does this app show?
    let price = 140; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  16. 16.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  17. 17.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) adding up a bill (d) a pop-up message
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 63; // 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 4 (b) line 3 (c) line 2 (d) line 1
  19. 19.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  20. 20.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) output (c) input
  21. 21.⚙️ What number does this app show?
    let bill = 52; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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 2 (b) line 4 (c) line 1 (d) line 3
  23. 23.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  24. 24.⚙️ What number does this app show?
    let price = 530; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  25. 25.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  26. 26.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) a result on screen (d) taking a photo
  27. 27.True or false: speaking a command is an input. (a) False (b) True
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 70; // 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 1 (c) line 3 (d) line 2
  29. 29.True or false: speaking a command is processing. (a) False (b) True
  30. 30.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 390; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  32. 32.⚙️ 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);
  33. 33.True or false: tapping a button is an input. (a) True (b) False
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 2 (b) line 3 (c) line 1 (d) line 4
  35. 35.Which of these is an input? (a) adding up a bill (b) speaking a command (c) a result on screen (d) working out a tip
  36. 36.True or false: sorting the scores is processing. (a) True (b) False
  37. 37.Which of these is an input? (a) sorting the scores (b) a pop-up message (c) typing your age (d) a buzz (vibration)
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // 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 1 (b) line 4 (c) line 2 (d) line 3
  39. 39.⚙️ What number does this app show?
    let price = 320; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  40. 40.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);

Answer key

  1. True
  2. a beep sound
  3. a buzz (vibration)
  4. 60
  5. adding up a bill
  6. output
  7. taking a photo
  8. line 2
  9. 24
  10. a result on screen
  11. processing
  12. False
  13. line 3
  14. checking a password
  15. 90
  16. 240
  17. a pop-up message
  18. line 3
  19. 150
  20. output
  21. 26
  22. line 3
  23. 90
  24. 510
  25. 45
  26. taking a photo
  27. True
  28. line 3
  29. False
  30. processing
  31. line 3
  32. 195
  33. True
  34. line 3
  35. speaking a command
  36. True
  37. typing your age
  38. line 3
  39. 290
  40. 380

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