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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 754 · 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.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
  2. 2.⚙️ What number does this app show?
    let bill = 68; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  3. 3.True or false: a buzz (vibration) is an output. (a) True (b) False
  4. 4.🔍 Which is the odd one out? (a) a pop-up message (b) adding up a bill (c) a result on screen (d) a buzz (vibration)
  5. 5.Which of these is an input? (a) working out a tip (b) a buzz (vibration) (c) checking a password (d) taking a photo
  6. 6.Which of these is an input? (a) a pop-up message (b) a beep sound (c) working out a tip (d) typing your age
  7. 7.⚙️ What number does this app show?
    let bill = 130; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  8. 8.⚙️ What number does this app show?
    let bill = 148; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  9. 9.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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 3 (c) line 2 (d) line 1
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 350; // 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 4 (b) line 1 (c) line 3 (d) line 2
  11. 11.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  12. 12.Which of these is an output? (a) sorting the scores (b) adding up a bill (c) speaking a command (d) a result on screen
  13. 13.⚙️ 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
  14. 14.⚙️ What number does this app show?
    let bill = 305; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  15. 15.⚙️ 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 3 (b) line 2 (c) line 1
  16. 16.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  17. 17.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) output (c) input
  18. 18.Which of these is an input? (a) a pop-up message (b) tapping a button (c) a result on screen (d) working out a tip
  19. 19.⚙️ What number does this app show?
    let price = 130; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  20. 20.⚙️ What number does this app show?
    let price = 540; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  21. 21.True or false: a pop-up message is an input. (a) False (b) True
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // 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 3 (c) line 2 (d) line 4
  23. 23.True or false: a beep sound is an output. (a) False (b) True
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 275; // 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 1 (d) line 4
  25. 25.Which of these is processing? (a) typing your age (b) sorting the scores (c) speaking a command (d) a result on screen
  26. 26.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  27. 27.True or false: speaking a command is an input. (a) False (b) True
  28. 28.True or false: a buzz (vibration) is an input. (a) True (b) False
  29. 29.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
  30. 30.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) tapping a button (d) checking a password
  31. 31.⚙️ What number does this app show?
    let bill = 156; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 112; // 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 1 (c) line 4 (d) line 3
  33. 33.True or false: working out a tip is an input. (a) False (b) True
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 13; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 3 (c) line 1
  35. 35.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  36. 36.True or false: typing your age is processing. (a) True (b) False
  37. 37.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  38. 38.Which of these is an input? (a) speaking a command (b) a result on screen (c) checking a password (d) working out a tip
  39. 39.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) a result on screen (d) working out a tip
  40. 40.True or false: adding up a bill is an output. (a) False (b) True

Answer key

  1. input
  2. 17
  3. True
  4. adding up a bill
  5. taking a photo
  6. typing your age
  7. 26
  8. 37
  9. line 3
  10. line 3
  11. input
  12. a result on screen
  13. line 2
  14. 61
  15. line 2
  16. 3000
  17. output
  18. tapping a button
  19. 100
  20. 530
  21. False
  22. line 3
  23. True
  24. line 3
  25. sorting the scores
  26. 600
  27. True
  28. False
  29. input
  30. tapping a button
  31. 39
  32. line 3
  33. False
  34. line 2
  35. 300
  36. False
  37. 230
  38. speaking a command
  39. working out a tip
  40. False

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