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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 371 · 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.True or false: typing your age is an output. (a) False (b) True
  2. 2.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) processing (c) input
  3. 3.🔍 Which is the odd one out? (a) tapping a button (b) a beep sound (c) speaking a command (d) taking a photo
  4. 4.⚙️ What number does this app show?
    let price = 200; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  5. 5.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
  6. 6.True or false: working out a tip is an input. (a) True (b) False
  7. 7.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  8. 8.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) a beep sound (d) checking a password
  9. 9.True or false: sorting the scores is processing. (a) True (b) False
  10. 10.⚙️ What number does this app show?
    let price = 440; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  11. 11.Which of these is an input? (a) speaking a command (b) checking a password (c) adding up a bill (d) a result on screen
  12. 12.⚙️ What number does this app show?
    let bill = 315; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  13. 13.🔍 Which is the odd one out? (a) tapping a button (b) a result on screen (c) a pop-up message (d) a beep sound
  14. 14.🔍 Which is the odd one out? (a) sorting the scores (b) taking a photo (c) adding up a bill (d) checking a password
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 400; // 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 1 (b) line 4 (c) line 2 (d) line 3
  16. 16.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
  17. 17.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) processing (c) output
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 84; // 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 4 (c) line 3 (d) line 1
  19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 400; // 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 2 (d) line 4
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 400; // typed by the user
    line 2: let friends = 5; // 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
  21. 21.Which of these is an output? (a) a pop-up message (b) taking a photo (c) tapping a button (d) sorting the scores
  22. 22.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
  23. 23.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
  24. 24.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
  25. 25.Which of these is an output? (a) taking a photo (b) working out a tip (c) checking a password (d) a beep sound
  26. 26.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  27. 27.⚙️ What number does this app show?
    let bill = 160; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  28. 28.True or false: a result on screen is an output. (a) True (b) False
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // 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
  30. 30.Which of these is an input? (a) a beep sound (b) sorting the scores (c) checking a password (d) typing your age
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 25; // 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 4 (d) line 3
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 490; // 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 3 (d) line 4
  33. 33.True or false: checking a password is an output. (a) False (b) True
  34. 34.⚙️ 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 3 (b) line 4 (c) line 2 (d) line 1
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 308; // 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 4 (d) line 3
  36. 36.🔍 Which is the odd one out? (a) a buzz (vibration) (b) checking a password (c) sorting the scores (d) adding up a bill
  37. 37.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
  38. 38.True or false: sorting the scores is an output. (a) True (b) False
  39. 39.True or false: a buzz (vibration) is an output. (a) False (b) True
  40. 40.Which of these is an output? (a) a result on screen (b) working out a tip (c) taking a photo (d) adding up a bill

Answer key

  1. False
  2. processing
  3. a beep sound
  4. 190
  5. 11000
  6. False
  7. 60
  8. checking a password
  9. True
  10. 390
  11. speaking a command
  12. 63
  13. tapping a button
  14. taking a photo
  15. line 3
  16. 7000
  17. processing
  18. line 3
  19. line 3
  20. line 3
  21. a pop-up message
  22. 14000
  23. input
  24. input
  25. a beep sound
  26. 12000
  27. 80
  28. True
  29. line 3
  30. typing your age
  31. line 3
  32. line 3
  33. False
  34. line 3
  35. line 3
  36. a buzz (vibration)
  37. output
  38. False
  39. True
  40. a result on screen

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