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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 554 · 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) adding up a bill (b) sorting the scores (c) checking a password (d) a result on screen
  2. 2.True or false: tapping a button is an output. (a) True (b) False
  3. 3.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  4. 4.Which of these is an input? (a) a buzz (vibration) (b) adding up a bill (c) taking a photo (d) checking a password
  5. 5.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
  6. 6.🔍 Which is the odd one out? (a) tapping a button (b) checking a password (c) taking a photo (d) speaking a command
  7. 7.Which of these is processing? (a) speaking a command (b) a pop-up message (c) working out a tip (d) typing your age
  8. 8.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  9. 9.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 4 (b) line 2 (c) line 1 (d) line 3
  11. 11.🔍 Which is the odd one out? (a) checking a password (b) typing your age (c) adding up a bill (d) sorting the scores
  12. 12.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) sorting the scores
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 510; // 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 2 (b) line 1 (c) line 4 (d) line 3
  14. 14.⚙️ 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 1 (b) line 2 (c) line 3
  15. 15.True or false: a result on screen is an output. (a) False (b) True
  16. 16.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) speaking a command (d) sorting the scores
  17. 17.True or false: sorting the scores is an input. (a) True (b) False
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 284; // 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 2 (c) line 3 (d) line 4
  19. 19.⚙️ What number does this app show?
    let price = 340; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 7; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  21. 21.True or false: checking a password is an output. (a) False (b) True
  22. 22.True or false: checking a password is processing. (a) True (b) False
  23. 23.⚙️ What number does this app show?
    let price = 500; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  24. 24.True or false: sorting the scores is processing. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) a pop-up message
  26. 26.Which of these is processing? (a) a buzz (vibration) (b) taking a photo (c) sorting the scores (d) a result on screen
  27. 27.⚙️ 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 3 (b) line 2 (c) line 1
  28. 28.⚙️ 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 1 (b) line 2 (c) line 3 (d) line 4
  29. 29.True or false: a beep sound is an output. (a) False (b) True
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 96; // 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 2 (b) line 1 (c) line 4 (d) line 3
  31. 31.Which of these is an input? (a) typing your age (b) a result on screen (c) adding up a bill (d) a beep sound
  32. 32.True or false: taking a photo is an input. (a) True (b) False
  33. 33.⚙️ What number does this app show?
    let bill = 183; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  34. 34.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) taking a photo (d) a buzz (vibration)
  35. 35.⚙️ What number does this app show?
    let price = 360; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 106; // 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 2 (d) line 4
  37. 37.⚙️ What number does this app show?
    let bill = 188; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // 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 3 (b) line 2 (c) line 4 (d) line 1
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 1 (c) line 2 (d) line 3
  40. 40.Which of these is processing? (a) speaking a command (b) taking a photo (c) checking a password (d) a result on screen

Answer key

  1. a result on screen
  2. False
  3. 160
  4. taking a photo
  5. output
  6. checking a password
  7. working out a tip
  8. 300
  9. processing
  10. line 3
  11. typing your age
  12. sorting the scores
  13. line 3
  14. line 2
  15. True
  16. speaking a command
  17. False
  18. line 3
  19. 320
  20. line 2
  21. False
  22. True
  23. 490
  24. True
  25. a pop-up message
  26. sorting the scores
  27. line 2
  28. line 3
  29. True
  30. line 3
  31. typing your age
  32. True
  33. 61
  34. taking a photo
  35. 340
  36. line 3
  37. 47
  38. line 3
  39. line 3
  40. checking a password

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