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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 987 · 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 buzz (vibration) (b) typing your age (c) a pop-up message (d) a result on screen
  2. 2.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
  3. 3.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  4. 4.Which of these is an input? (a) taking a photo (b) a buzz (vibration) (c) adding up a bill (d) sorting the scores
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 2 (c) line 1 (d) line 3
  6. 6.Which of these is an output? (a) a buzz (vibration) (b) taking a photo (c) typing your age (d) tapping a button
  7. 7.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  8. 8.True or false: a buzz (vibration) is an input. (a) False (b) True
  9. 9.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 410; // 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 3 (b) line 1 (c) line 2 (d) line 4
  10. 10.Which of these is processing? (a) tapping a button (b) taking a photo (c) checking a password (d) typing your age
  11. 11.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
  12. 12.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) input (c) output
  13. 13.Which of these is an input? (a) adding up a bill (b) a beep sound (c) a result on screen (d) typing your age
  14. 14.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 3 (b) line 4 (c) line 2 (d) line 1
  16. 16.Which of these is an output? (a) working out a tip (b) a beep sound (c) adding up a bill (d) sorting the scores
  17. 17.True or false: taking a photo is an input. (a) True (b) False
  18. 18.⚙️ What number does this app show?
    let bill = 22; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  19. 19.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
  20. 20.True or false: typing your age is an output. (a) True (b) False
  21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 84; // 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 2 (c) line 3 (d) line 1
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 168; // 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 3 (d) line 4
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 550; // typed by the user
    line 2: let off = 50; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 2 (b) line 1 (c) line 3 (d) line 4
  24. 24.⚙️ 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
  25. 25.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
  26. 26.True or false: checking a password is an output. (a) False (b) True
  27. 27.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
  28. 28.True or false: working out a tip is processing. (a) True (b) False
  29. 29.⚙️ What number does this app show?
    let price = 250; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  30. 30.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) a result on screen (d) speaking a command
  31. 31.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  32. 32.⚙️ What number does this app show?
    let bill = 176; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  33. 33.⚙️ What number does this app show?
    let bill = 231; // 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 result on screen (c) sorting the scores (d) a beep sound
  35. 35.⚙️ What number does this app show?
    let price = 290; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  36. 36.⚙️ What number does this app show?
    let bill = 228; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  37. 37.🔍 Which is the odd one out? (a) a result on screen (b) working out a tip (c) a pop-up message (d) a beep sound
  38. 38.🔍 Which is the odd one out? (a) speaking a command (b) checking a password (c) working out a tip (d) adding up a bill
  39. 39.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) input (c) processing
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 490; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 1 (c) line 3 (d) line 2

Answer key

  1. typing your age
  2. input
  3. line 2
  4. taking a photo
  5. line 3
  6. a buzz (vibration)
  7. 4000
  8. False
  9. line 3
  10. checking a password
  11. processing
  12. output
  13. typing your age
  14. 12000
  15. line 3
  16. a beep sound
  17. True
  18. 11
  19. input
  20. False
  21. line 3
  22. line 3
  23. line 3
  24. line 2
  25. input
  26. False
  27. 9000
  28. True
  29. 200
  30. a result on screen
  31. 70
  32. 44
  33. 77
  34. sorting the scores
  35. 250
  36. 57
  37. working out a tip
  38. speaking a command
  39. output
  40. line 3

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