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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 199 · 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 is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) a pop-up message (d) tapping a button
  2. 2.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  3. 3.True or false: a pop-up message is an input. (a) False (b) True
  4. 4.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
  5. 5.⚙️ 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 3 (b) line 1 (c) line 2
  6. 6.⚙️ What number does this app show?
    let price = 510; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  7. 7.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  8. 8.True or false: checking a password is an input. (a) True (b) False
  9. 9.True or false: a beep sound is an input. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) working out a tip (d) a result on screen
  11. 11.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 2 (b) line 3 (c) line 1 (d) line 4
  13. 13.True or false: a pop-up message is processing. (a) True (b) False
  14. 14.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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 1 (b) line 2 (c) line 3 (d) line 4
  16. 16.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
  17. 17.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  18. 18.True or false: working out a tip is processing. (a) False (b) True
  19. 19.⚙️ What number does this app show?
    let bill = 95; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  20. 20.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  21. 21.True or false: a buzz (vibration) is processing. (a) False (b) True
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 375; // 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 1 (c) line 4 (d) line 3
  23. 23.⚙️ 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 2 (c) line 3
  24. 24.🔍 Which is the odd one out? (a) typing your age (b) taking a photo (c) tapping a button (d) a pop-up message
  25. 25.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) taking a photo (d) a beep sound
  26. 26.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) taking a photo (d) working out a tip
  27. 27.Which of these is an input? (a) speaking a command (b) checking a password (c) a beep sound (d) a result on screen
  28. 28.Which of these is an input? (a) adding up a bill (b) taking a photo (c) checking a password (d) a buzz (vibration)
  29. 29.Which of these is processing? (a) tapping a button (b) taking a photo (c) working out a tip (d) a result on screen
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 150; // 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 1 (c) line 4 (d) line 2
  31. 31.⚙️ What number does this app show?
    let price = 120; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  32. 32.Which of these is an output? (a) tapping a button (b) checking a password (c) typing your age (d) a result on screen
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 1 (b) line 4 (c) line 3 (d) line 2
  34. 34.Which of these is an input? (a) typing your age (b) a result on screen (c) checking a password (d) sorting the scores
  35. 35.⚙️ What number does this app show?
    let price = 370; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  36. 36.⚙️ What number does this app show?
    let bill = 105; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 14; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 2 (c) line 3
  38. 38.True or false: sorting the scores is processing. (a) True (b) False
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 440; // 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
  40. 40.True or false: tapping a button is processing. (a) False (b) True

Answer key

  1. tapping a button
  2. 4000
  3. False
  4. output
  5. line 2
  6. 460
  7. 275
  8. False
  9. False
  10. a result on screen
  11. input
  12. line 3
  13. False
  14. processing
  15. line 3
  16. output
  17. 140
  18. True
  19. 19
  20. 230
  21. False
  22. line 3
  23. line 2
  24. a pop-up message
  25. a beep sound
  26. working out a tip
  27. speaking a command
  28. taking a photo
  29. working out a tip
  30. line 3
  31. 100
  32. a result on screen
  33. line 3
  34. typing your age
  35. 320
  36. 21
  37. line 2
  38. True
  39. line 3
  40. False

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