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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 705 · 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 price = 190; // 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 4 (b) line 1 (c) line 2 (d) line 3
  2. 2.True or false: typing your age is an input. (a) False (b) True
  3. 3.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 228; // 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 3 (b) line 2 (c) line 4 (d) line 1
  4. 4.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) tapping a button (d) taking a photo
  5. 5.⚙️ 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 2 (c) line 3
  6. 6.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 4 (b) line 1 (c) line 3 (d) line 2
  7. 7.⚙️ What number does this app show?
    let price = 190; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  8. 8.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) working out a tip (d) adding up a bill
  9. 9.Which of these is processing? (a) a buzz (vibration) (b) tapping a button (c) a beep sound (d) adding up a bill
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 1 (b) line 2 (c) line 3 (d) line 4
  11. 11.True or false: a pop-up message is an output. (a) True (b) False
  12. 12.True or false: tapping a button is an output. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) adding up a bill (b) tapping a button (c) speaking a command (d) typing your age
  14. 14.🔍 Which is the odd one out? (a) speaking a command (b) a beep sound (c) a buzz (vibration) (d) a result on screen
  15. 15.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  16. 16.True or false: sorting the scores is processing. (a) False (b) True
  17. 17.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 52; // 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 2 (c) line 4 (d) line 3
  19. 19.Which of these is an input? (a) a buzz (vibration) (b) sorting the scores (c) checking a password (d) typing your age
  20. 20.True or false: a result on screen is an input. (a) True (b) False
  21. 21.⚙️ What number does this app show?
    let price = 350; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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 2 (b) line 4 (c) line 1 (d) line 3
  23. 23.True or false: working out a tip is an input. (a) False (b) True
  24. 24.⚙️ 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 2 (b) line 3 (c) line 1
  25. 25.Which of these is an output? (a) adding up a bill (b) a result on screen (c) speaking a command (d) tapping a button
  26. 26.Which of these is processing? (a) a pop-up message (b) typing your age (c) a beep sound (d) working out a tip
  27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 130; // 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
  28. 28.True or false: speaking a command is an input. (a) True (b) False
  29. 29.🔍 Which is the odd one out? (a) checking a password (b) tapping a button (c) taking a photo (d) typing your age
  30. 30.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
  31. 31.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  32. 32.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
  33. 33.Which of these is an input? (a) checking a password (b) sorting the scores (c) taking a photo (d) a buzz (vibration)
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 75; // 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 2 (b) line 3 (c) line 1 (d) line 4
  35. 35.⚙️ What number does this app show?
    let bill = 66; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  36. 36.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
  37. 37.⚙️ What number does this app show?
    let price = 600; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  38. 38.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  39. 39.⚙️ What number does this app show?
    let bill = 158; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  40. 40.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output

Answer key

  1. line 3
  2. True
  3. line 3
  4. sorting the scores
  5. line 2
  6. line 3
  7. 180
  8. typing your age
  9. adding up a bill
  10. line 3
  11. True
  12. False
  13. adding up a bill
  14. speaking a command
  15. 12000
  16. True
  17. processing
  18. line 3
  19. typing your age
  20. False
  21. 320
  22. line 3
  23. False
  24. line 2
  25. a result on screen
  26. working out a tip
  27. line 3
  28. True
  29. checking a password
  30. input
  31. 3000
  32. output
  33. taking a photo
  34. line 3
  35. 22
  36. 10000
  37. 570
  38. 8000
  39. 79
  40. output

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