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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 719 · 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: a result on screen is an output. (a) True (b) False
  2. 2.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 30; // 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 2 (b) line 4 (c) line 3 (d) line 1
  3. 3.Which of these is an output? (a) sorting the scores (b) a pop-up message (c) working out a tip (d) typing your age
  4. 4.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  5. 5.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
  6. 6.Which of these is an output? (a) a result on screen (b) taking a photo (c) tapping a button (d) typing your age
  7. 7.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  8. 8.Which of these is processing? (a) a buzz (vibration) (b) adding up a bill (c) typing your age (d) taking a photo
  9. 9.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 320; // 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 1 (b) line 2 (c) line 4 (d) line 3
  10. 10.⚙️ What number does this app show?
    let bill = 207; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  11. 11.🔍 Which is the odd one out? (a) taking a photo (b) adding up a bill (c) tapping a button (d) speaking a command
  12. 12.Which of these is an input? (a) working out a tip (b) adding up a bill (c) sorting the scores (d) speaking a command
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 7; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 2 (c) line 1
  14. 14.⚙️ 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 1 (b) line 2 (c) line 4 (d) line 3
  15. 15.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 244; // 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 3 (b) line 4 (c) line 1 (d) line 2
  17. 17.Which of these is an output? (a) a buzz (vibration) (b) checking a password (c) working out a tip (d) tapping a button
  18. 18.⚙️ What number does this app show?
    let bill = 144; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  19. 19.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
  20. 20.⚙️ What number does this app show?
    let price = 300; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  21. 21.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
  22. 22.True or false: taking a photo is an output. (a) False (b) True
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 2 (b) line 4 (c) line 3 (d) line 1
  24. 24.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
  25. 25.True or false: a pop-up message is an input. (a) False (b) True
  26. 26.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) checking a password (d) a result on screen
  27. 27.⚙️ 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 3 (b) line 1 (c) line 2
  28. 28.⚙️ What number does this app show?
    let price = 180; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  29. 29.Which of these is processing? (a) typing your age (b) a beep sound (c) working out a tip (d) a buzz (vibration)
  30. 30.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) a pop-up message (d) sorting the scores
  31. 31.⚙️ 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 3 (b) line 2 (c) line 1
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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 1 (c) line 3 (d) line 4
  34. 34.🔍 Which is the odd one out? (a) tapping a button (b) a buzz (vibration) (c) a pop-up message (d) a result on screen
  35. 35.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  36. 36.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) checking a password (d) a buzz (vibration)
  37. 37.True or false: typing your age is an input. (a) False (b) True
  38. 38.True or false: sorting the scores is processing. (a) False (b) True
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 2 (c) line 3
  40. 40.Which of these is an input? (a) a pop-up message (b) a result on screen (c) typing your age (d) checking a password

Answer key

  1. True
  2. line 3
  3. a pop-up message
  4. 150
  5. input
  6. a result on screen
  7. 240
  8. adding up a bill
  9. line 3
  10. 69
  11. adding up a bill
  12. speaking a command
  13. line 2
  14. line 3
  15. output
  16. line 3
  17. a buzz (vibration)
  18. 48
  19. processing
  20. 280
  21. 11000
  22. False
  23. line 3
  24. output
  25. False
  26. checking a password
  27. line 2
  28. 130
  29. working out a tip
  30. a pop-up message
  31. line 2
  32. line 2
  33. line 3
  34. tapping a button
  35. 285
  36. a buzz (vibration)
  37. True
  38. True
  39. line 2
  40. typing your age

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