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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 461 · 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 checking a password an input, processing or an output? (a) processing (b) output (c) input
  2. 2.🔍 Which is the odd one out? (a) tapping a button (b) checking a password (c) taking a photo (d) typing your age
  3. 3.Which of these is an input? (a) typing your age (b) a buzz (vibration) (c) a beep sound (d) adding up a bill
  4. 4.⚙️ 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);
  5. 5.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) processing (c) output
  6. 6.⚙️ 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 2 (b) line 3 (c) line 1
  7. 7.Which of these is an output? (a) a beep sound (b) checking a password (c) typing your age (d) tapping a button
  8. 8.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  9. 9.⚙️ What number does this app show?
    let bill = 135; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  10. 10.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
  11. 11.Which of these is an input? (a) a buzz (vibration) (b) a result on screen (c) adding up a bill (d) tapping a button
  12. 12.True or false: working out a tip is processing. (a) True (b) False
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 50; // 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 4 (c) line 3 (d) line 1
  14. 14.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
  15. 15.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
  16. 16.🔍 Which is the odd one out? (a) sorting the scores (b) taking a photo (c) checking a password (d) adding up a bill
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 126; // 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 1 (d) line 2
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 207; // 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 2 (c) line 3 (d) line 1
  19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 136; // 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 4 (c) line 1 (d) line 3
  20. 20.⚙️ What number does this app show?
    let km = 13; // typed by the user
    let metres = km * 1000;
    show(metres);
  21. 21.True or false: a result on screen is an output. (a) False (b) True
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 120; // 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 3 (b) line 2 (c) line 1 (d) line 4
  23. 23.⚙️ 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 1 (b) line 2 (c) line 4 (d) line 3
  24. 24.True or false: a pop-up message is an output. (a) False (b) True
  25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 24; // 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 3 (c) line 4 (d) line 1
  26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 190; // 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 4 (d) line 2
  27. 27.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
  28. 28.Which of these is processing? (a) a result on screen (b) working out a tip (c) tapping a button (d) a buzz (vibration)
  29. 29.⚙️ 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 3 (b) line 2 (c) line 1
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 54; // 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 4 (c) line 3 (d) line 1
  31. 31.⚙️ 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 1 (b) line 2 (c) line 4 (d) line 3
  32. 32.True or false: working out a tip is an output. (a) True (b) False
  33. 33.Which of these is an output? (a) tapping a button (b) a result on screen (c) checking a password (d) typing your age
  34. 34.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
  35. 35.Which of these is an input? (a) sorting the scores (b) a result on screen (c) adding up a bill (d) taking a photo
  36. 36.True or false: speaking a command is an input. (a) False (b) True
  37. 37.⚙️ What number does this app show?
    let bill = 365; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 272; // 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 2 (d) line 1
  39. 39.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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 1 (c) line 3 (d) line 4

Answer key

  1. processing
  2. checking a password
  3. typing your age
  4. 130
  5. processing
  6. line 2
  7. a beep sound
  8. input
  9. 27
  10. processing
  11. tapping a button
  12. True
  13. line 3
  14. 9000
  15. 5000
  16. taking a photo
  17. line 3
  18. line 3
  19. line 3
  20. 13000
  21. True
  22. line 3
  23. line 3
  24. True
  25. line 3
  26. line 3
  27. input
  28. working out a tip
  29. line 2
  30. line 3
  31. line 3
  32. False
  33. a result on screen
  34. 10000
  35. taking a photo
  36. True
  37. 73
  38. line 3
  39. 70
  40. line 3

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