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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 675 · 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 taking a photo an input, processing or an output? (a) processing (b) input (c) output
  2. 2.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) a result on screen (d) taking a photo
  3. 3.Which of these is processing? (a) taking a photo (b) a pop-up message (c) sorting the scores (d) a buzz (vibration)
  4. 4.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
  5. 5.True or false: a pop-up message is an output. (a) False (b) True
  6. 6.⚙️ What number does this app show?
    let bill = 36; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  7. 7.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) speaking a command (d) checking a password
  8. 8.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) output (c) input
  9. 9.⚙️ 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 2 (d) line 3
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 4; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  11. 11.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  12. 12.🔍 Which is the odd one out? (a) a beep sound (b) sorting the scores (c) working out a tip (d) checking a password
  13. 13.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  14. 14.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
  15. 15.⚙️ What number does this app show?
    let price = 180; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  16. 16.Which of these is an output? (a) sorting the scores (b) adding up a bill (c) taking a photo (d) a pop-up message
  17. 17.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  18. 18.True or false: a beep sound is an output. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) tapping a button (d) a result on screen
  20. 20.True or false: speaking a command is an input. (a) True (b) False
  21. 21.True or false: checking a password is processing. (a) True (b) False
  22. 22.⚙️ 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 1 (b) line 3 (c) line 2
  23. 23.True or false: adding up a bill is an input. (a) True (b) False
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 330; // 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 4 (c) line 1 (d) line 3
  25. 25.True or false: a result on screen is processing. (a) True (b) False
  26. 26.Which of these is an input? (a) a pop-up message (b) a result on screen (c) a beep sound (d) typing your age
  27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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 1 (b) line 2 (c) line 4 (d) line 3
  28. 28.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
  29. 29.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) speaking a command (d) a pop-up message
  30. 30.Which of these is processing? (a) a result on screen (b) a beep sound (c) adding up a bill (d) a buzz (vibration)
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 280; // 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
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 56; // 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 3 (d) line 2
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 88; // 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 4 (b) line 3 (c) line 2 (d) line 1
  34. 34.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
  35. 35.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  36. 36.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
  37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 10; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 520; // 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 4 (d) line 3
  39. 39.🔍 Which is the odd one out? (a) adding up a bill (b) a buzz (vibration) (c) a result on screen (d) a beep sound
  40. 40.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) processing (c) output

Answer key

  1. input
  2. a result on screen
  3. sorting the scores
  4. processing
  5. True
  6. 12
  7. speaking a command
  8. output
  9. line 3
  10. line 2
  11. 390
  12. a beep sound
  13. 90
  14. 15000
  15. 150
  16. a pop-up message
  17. 250
  18. True
  19. tapping a button
  20. True
  21. True
  22. line 2
  23. False
  24. line 3
  25. False
  26. typing your age
  27. line 3
  28. 14000
  29. a pop-up message
  30. adding up a bill
  31. line 3
  32. line 3
  33. line 3
  34. 6000
  35. 60
  36. processing
  37. line 2
  38. line 3
  39. adding up a bill
  40. input

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