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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 542 · 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 = 125; // 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 3 (c) line 4 (d) line 2
  2. 2.Which of these is an input? (a) adding up a bill (b) typing your age (c) checking a password (d) a result on screen
  3. 3.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) tapping a button (d) a beep sound
  4. 4.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
  5. 5.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
  6. 6.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) input (c) processing
  7. 7.Which of these is an input? (a) a pop-up message (b) adding up a bill (c) working out a tip (d) taking a photo
  8. 8.Which of these is an output? (a) a pop-up message (b) tapping a button (c) adding up a bill (d) typing your age
  9. 9.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  10. 10.⚙️ What number does this app show?
    let bill = 82; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 510; // 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
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 150; // 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 2 (c) line 3 (d) line 4
  13. 13.⚙️ 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 2 (b) line 1 (c) line 4 (d) line 3
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // 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 2 (c) line 4 (d) line 3
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 186; // 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 1 (d) line 2
  16. 16.🔍 Which is the odd one out? (a) speaking a command (b) tapping a button (c) a pop-up message (d) typing your age
  17. 17.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) output (c) input
  18. 18.⚙️ What number does this app show?
    let bill = 146; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 15; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 2 (c) line 3
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  21. 21.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) typing your age (d) sorting the scores
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  23. 23.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
  24. 24.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) tapping a button (d) checking a password
  25. 25.True or false: a beep sound is processing. (a) True (b) False
  26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 5; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  27. 27.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  28. 28.Which of these is processing? (a) speaking a command (b) a pop-up message (c) checking a password (d) a result on screen
  29. 29.🔍 Which is the odd one out? (a) working out a tip (b) sorting the scores (c) adding up a bill (d) tapping a button
  30. 30.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  31. 31.Which of these is an output? (a) a result on screen (b) speaking a command (c) working out a tip (d) checking a password
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 395; // 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 2 (b) line 4 (c) line 1 (d) line 3
  33. 33.True or false: typing your age is an input. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) typing your age (b) sorting the scores (c) adding up a bill (d) working out a tip
  35. 35.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
  36. 36.🔍 Which is the odd one out? (a) tapping a button (b) adding up a bill (c) typing your age (d) speaking a command
  37. 37.⚙️ 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 3 (b) line 2 (c) line 1
  38. 38.🔍 Which is the odd one out? (a) working out a tip (b) adding up a bill (c) sorting the scores (d) speaking a command
  39. 39.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
  40. 40.True or false: a buzz (vibration) is an input. (a) True (b) False

Answer key

  1. line 3
  2. typing your age
  3. a beep sound
  4. input
  5. 10000
  6. processing
  7. taking a photo
  8. a pop-up message
  9. 8000
  10. 41
  11. line 3
  12. line 3
  13. line 3
  14. line 3
  15. line 3
  16. a pop-up message
  17. output
  18. 73
  19. line 2
  20. line 2
  21. sorting the scores
  22. line 2
  23. 15000
  24. checking a password
  25. False
  26. line 2
  27. 12000
  28. checking a password
  29. tapping a button
  30. 360
  31. a result on screen
  32. line 3
  33. True
  34. typing your age
  35. processing
  36. adding up a bill
  37. line 2
  38. speaking a command
  39. 9000
  40. False

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