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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 738 · 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.⚙️ What number does this app show?
    let bill = 28; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  2. 2.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 158; // 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 2 (b) line 1 (c) line 4 (d) line 3
  3. 3.⚙️ What number does this app show?
    let bill = 216; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  4. 4.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) processing (c) output
  5. 5.⚙️ What number does this app show?
    let price = 430; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  6. 6.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  7. 7.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 170; // 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 4 (c) line 3 (d) line 1
  8. 8.True or false: typing your age is an input. (a) True (b) False
  9. 9.True or false: speaking a command is processing. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) sorting the scores (b) a beep sound (c) working out a tip (d) checking a password
  11. 11.Which of these is processing? (a) speaking a command (b) a result on screen (c) sorting the scores (d) tapping a button
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 76; // 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 2 (c) line 4 (d) line 3
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 360; // 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 3 (c) line 1 (d) line 2
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 460; // 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 1 (c) line 4 (d) line 2
  15. 15.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  16. 16.⚙️ What number does this app show?
    let km = 13; // typed by the user
    let metres = km * 1000;
    show(metres);
  17. 17.True or false: a buzz (vibration) is an output. (a) True (b) False
  18. 18.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  19. 19.Which of these is processing? (a) tapping a button (b) speaking a command (c) a buzz (vibration) (d) adding up a bill
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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
  21. 21.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) a pop-up message (d) checking a password
  22. 22.Which of these is an input? (a) sorting the scores (b) a result on screen (c) a buzz (vibration) (d) typing your age
  23. 23.True or false: speaking a command is an output. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) a buzz (vibration) (b) adding up a bill (c) a beep sound (d) a result on screen
  25. 25.True or false: taking a photo is an input. (a) False (b) True
  26. 26.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
  27. 27.Which of these is processing? (a) a pop-up message (b) working out a tip (c) a buzz (vibration) (d) typing your age
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 70; // 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 2 (c) line 3 (d) line 1
  29. 29.True or false: checking a password is an output. (a) False (b) True
  30. 30.⚙️ What number does this app show?
    let bill = 96; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  31. 31.True or false: a beep sound is processing. (a) True (b) False
  32. 32.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  33. 33.True or false: a pop-up message is processing. (a) True (b) False
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 230; // 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 3 (c) line 2 (d) line 1
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 5; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 1 (c) line 2 (d) line 3
  36. 36.🔍 Which is the odd one out? (a) a buzz (vibration) (b) typing your age (c) speaking a command (d) taking a photo
  37. 37.True or false: a result on screen is an output. (a) False (b) True
  38. 38.⚙️ 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 3 (b) line 2 (c) line 4 (d) line 1
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 95; // 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 1 (b) line 2 (c) line 3 (d) line 4
  40. 40.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input

Answer key

  1. 14
  2. line 3
  3. 54
  4. processing
  5. 390
  6. 8000
  7. line 3
  8. True
  9. False
  10. a beep sound
  11. sorting the scores
  12. line 3
  13. line 3
  14. line 3
  15. 130
  16. 13000
  17. True
  18. 150
  19. adding up a bill
  20. line 3
  21. a pop-up message
  22. typing your age
  23. False
  24. adding up a bill
  25. True
  26. output
  27. working out a tip
  28. line 3
  29. False
  30. 48
  31. False
  32. 260
  33. False
  34. line 3
  35. line 3
  36. a buzz (vibration)
  37. True
  38. line 3
  39. line 3
  40. output

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