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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 59 · 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) working out a tip (c) checking a password (d) a beep sound
  2. 2.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  3. 3.True or false: typing your age is an input. (a) False (b) True
  4. 4.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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
  5. 5.True or false: speaking a command is an input. (a) True (b) False
  6. 6.Which of these is an input? (a) a result on screen (b) tapping a button (c) sorting the scores (d) working out a tip
  7. 7.True or false: taking a photo is an output. (a) False (b) True
  8. 8.⚙️ What number does this app show?
    let price = 480; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  9. 9.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) speaking a command (d) a result on screen
  10. 10.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
  11. 11.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
  12. 12.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) processing (c) input
  13. 13.True or false: adding up a bill is an input. (a) True (b) False
  14. 14.Which of these is processing? (a) typing your age (b) a pop-up message (c) tapping a button (d) adding up a bill
  15. 15.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
  16. 16.True or false: tapping a button is processing. (a) True (b) False
  17. 17.Which of these is an input? (a) sorting the scores (b) a result on screen (c) speaking a command (d) a buzz (vibration)
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 4 (c) line 3 (d) line 2
  19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 147; // 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 3 (d) line 2
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 2 (c) line 1
  21. 21.True or false: sorting the scores is processing. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) speaking a command (d) tapping a button
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 90; // 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 2 (c) line 1 (d) line 4
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 160; // 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 2 (b) line 4 (c) line 3 (d) line 1
  25. 25.True or false: speaking a command is processing. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) adding up a bill (d) a pop-up message
  27. 27.🔍 Which is the odd one out? (a) a pop-up message (b) a result on screen (c) a buzz (vibration) (d) typing your age
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 130; // 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 2 (c) line 3 (d) line 1
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 4 (b) line 2 (c) line 3 (d) line 1
  30. 30.Which of these is an output? (a) tapping a button (b) checking a password (c) a beep sound (d) sorting the scores
  31. 31.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  32. 32.Which of these is an input? (a) adding up a bill (b) checking a password (c) typing your age (d) a pop-up message
  33. 33.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) output (c) input
  34. 34.⚙️ 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 2 (c) line 4 (d) line 1
  35. 35.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
  36. 36.Which of these is an output? (a) checking a password (b) working out a tip (c) a result on screen (d) sorting the scores
  37. 37.Which of these is processing? (a) a pop-up message (b) a result on screen (c) speaking a command (d) sorting the scores
  38. 38.True or false: taking a photo is an input. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) tapping a button (d) a result on screen
  40. 40.⚙️ What number does this app show?
    let price = 520; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);

Answer key

  1. a beep sound
  2. 90
  3. True
  4. line 3
  5. True
  6. tapping a button
  7. False
  8. 470
  9. speaking a command
  10. processing
  11. input
  12. output
  13. False
  14. adding up a bill
  15. input
  16. False
  17. speaking a command
  18. line 3
  19. line 3
  20. line 2
  21. True
  22. sorting the scores
  23. line 3
  24. line 3
  25. False
  26. adding up a bill
  27. typing your age
  28. line 3
  29. line 3
  30. a beep sound
  31. 105
  32. typing your age
  33. input
  34. line 3
  35. processing
  36. a result on screen
  37. sorting the scores
  38. True
  39. tapping a button
  40. 510

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