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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 610 · 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: tapping a button is processing. (a) False (b) True
  2. 2.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
  3. 3.Which of these is an output? (a) adding up a bill (b) a result on screen (c) working out a tip (d) sorting the scores
  4. 4.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 2 (c) line 1
  5. 5.Which of these is an output? (a) sorting the scores (b) a beep sound (c) tapping a button (d) typing your age
  6. 6.True or false: working out a tip is processing. (a) False (b) True
  7. 7.🔍 Which is the odd one out? (a) adding up a bill (b) a beep sound (c) sorting the scores (d) working out a tip
  8. 8.True or false: checking a password is an input. (a) False (b) True
  9. 9.True or false: a beep sound is an output. (a) False (b) True
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 320; // 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 4 (b) line 1 (c) line 3 (d) line 2
  11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 1 (b) line 2 (c) line 3 (d) line 4
  12. 12.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  13. 13.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  14. 14.Which of these is processing? (a) typing your age (b) tapping a button (c) a result on screen (d) adding up a bill
  15. 15.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
  16. 16.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) checking a password (d) a buzz (vibration)
  17. 17.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
  18. 18.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  19. 19.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  20. 20.⚙️ 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);
  21. 21.Which of these is an output? (a) sorting the scores (b) a pop-up message (c) adding up a bill (d) typing your age
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 160; // 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 3 (c) line 4 (d) line 1
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 123; // 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 1 (b) line 4 (c) line 2 (d) line 3
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // 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 3 (c) line 4 (d) line 2
  25. 25.True or false: typing your age is an input. (a) False (b) True
  26. 26.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
  27. 27.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) typing your age (d) checking a password
  28. 28.True or false: checking a password is processing. (a) False (b) True
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 99; // 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 1 (b) line 2 (c) line 4 (d) line 3
  30. 30.⚙️ 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
  31. 31.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) tapping a button (d) a result on screen
  32. 32.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  33. 33.⚙️ What number does this app show?
    let price = 510; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  34. 34.True or false: a result on screen is an input. (a) False (b) True
  35. 35.⚙️ What number does this app show?
    let bill = 180; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 135; // 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 3 (c) line 4 (d) line 1
  37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // 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 2 (b) line 3 (c) line 4 (d) line 1
  38. 38.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
  39. 39.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) adding up a bill (d) a result on screen
  40. 40.Which of these is an input? (a) checking a password (b) adding up a bill (c) sorting the scores (d) speaking a command

Answer key

  1. False
  2. output
  3. a result on screen
  4. line 2
  5. a beep sound
  6. True
  7. a beep sound
  8. False
  9. True
  10. line 3
  11. line 3
  12. 240
  13. 4000
  14. adding up a bill
  15. processing
  16. a buzz (vibration)
  17. processing
  18. input
  19. 475
  20. 190
  21. a pop-up message
  22. line 3
  23. line 3
  24. line 3
  25. True
  26. input
  27. checking a password
  28. True
  29. line 3
  30. line 2
  31. tapping a button
  32. 30
  33. 480
  34. False
  35. 45
  36. line 3
  37. line 3
  38. output
  39. a result on screen
  40. speaking a command

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