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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 329 · 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 km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 2 (c) line 3
  2. 2.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) working out a tip (d) a buzz (vibration)
  3. 3.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) tapping a button (d) a result on screen
  4. 4.Which of these is an output? (a) typing your age (b) working out a tip (c) sorting the scores (d) a beep sound
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 4 (b) line 1 (c) line 3 (d) line 2
  6. 6.True or false: working out a tip is an input. (a) False (b) True
  7. 7.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  8. 8.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) processing (c) output
  9. 9.⚙️ 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);
  10. 10.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
  11. 11.True or false: adding up a bill is processing. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) sorting the scores (b) taking a photo (c) working out a tip (d) adding up a bill
  13. 13.🔍 Which is the odd one out? (a) tapping a button (b) a pop-up message (c) taking a photo (d) speaking a command
  14. 14.True or false: speaking a command is processing. (a) False (b) True
  15. 15.⚙️ What number does this app show?
    let price = 510; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 220; // 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 1 (b) line 4 (c) line 2 (d) line 3
  17. 17.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
  18. 18.Which of these is an output? (a) sorting the scores (b) checking a password (c) a result on screen (d) adding up a bill
  19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 140; // 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 3 (b) line 1 (c) line 4 (d) line 2
  20. 20.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // 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 3 (d) line 2
  22. 22.⚙️ What number does this app show?
    let bill = 45; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  23. 23.Which of these is processing? (a) a buzz (vibration) (b) taking a photo (c) adding up a bill (d) tapping a button
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 70; // 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 2 (c) line 3 (d) line 4
  25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 154; // 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 3 (c) line 4 (d) line 2
  26. 26.True or false: adding up a bill is an output. (a) False (b) True
  27. 27.⚙️ What number does this app show?
    let price = 580; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  28. 28.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output
  29. 29.🔍 Which is the odd one out? (a) typing your age (b) a result on screen (c) speaking a command (d) tapping a button
  30. 30.⚙️ What number does this app show?
    let price = 500; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  31. 31.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
  32. 32.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
  33. 33.⚙️ What number does this app show?
    let bill = 102; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  34. 34.True or false: tapping a button is an input. (a) True (b) False
  35. 35.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
  36. 36.True or false: checking a password is processing. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) a buzz (vibration) (b) checking a password (c) a beep sound (d) a pop-up message
  38. 38.⚙️ What number does this app show?
    let price = 520; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  39. 39.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 2 (b) line 1 (c) line 4 (d) line 3

Answer key

  1. line 2
  2. a buzz (vibration)
  3. tapping a button
  4. a beep sound
  5. line 3
  6. False
  7. 140
  8. processing
  9. 90
  10. processing
  11. True
  12. taking a photo
  13. a pop-up message
  14. False
  15. 470
  16. line 3
  17. input
  18. a result on screen
  19. line 3
  20. 8000
  21. line 3
  22. 15
  23. adding up a bill
  24. line 3
  25. line 3
  26. False
  27. 540
  28. output
  29. a result on screen
  30. 460
  31. output
  32. processing
  33. 51
  34. True
  35. input
  36. True
  37. checking a password
  38. 510
  39. input
  40. line 3

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