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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 853 · 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.⚙️ What number does this app show?
    let bill = 123; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  2. 2.Which of these is an input? (a) adding up a bill (b) a buzz (vibration) (c) typing your age (d) sorting the scores
  3. 3.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
  4. 4.🔍 Which is the odd one out? (a) typing your age (b) a buzz (vibration) (c) tapping a button (d) speaking a command
  5. 5.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  6. 6.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) a result on screen (d) working out a tip
  7. 7.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 1 (c) line 4 (d) line 3
  8. 8.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  9. 9.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) processing (c) output
  10. 10.Which of these is an output? (a) adding up a bill (b) working out a tip (c) a pop-up message (d) taking a photo
  11. 11.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
  12. 12.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
  13. 13.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  14. 14.Which of these is processing? (a) a beep sound (b) tapping a button (c) working out a tip (d) taking a photo
  15. 15.True or false: a beep sound is processing. (a) True (b) False
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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 1 (b) line 3 (c) line 2 (d) line 4
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 3 (c) line 2 (d) line 4
  18. 18.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  19. 19.Which of these is an input? (a) adding up a bill (b) checking a password (c) working out a tip (d) speaking a command
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 2 (b) line 3 (c) line 4 (d) line 1
  21. 21.Which of these is processing? (a) typing your age (b) a buzz (vibration) (c) adding up a bill (d) a result on screen
  22. 22.🔍 Which is the odd one out? (a) adding up a bill (b) a result on screen (c) a buzz (vibration) (d) a pop-up message
  23. 23.True or false: a buzz (vibration) is an output. (a) False (b) True
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 160; // 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 4 (b) line 3 (c) line 1 (d) line 2
  25. 25.True or false: speaking a command is an input. (a) True (b) False
  26. 26.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 126; // 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 4 (b) line 2 (c) line 3 (d) line 1
  28. 28.⚙️ 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);
  29. 29.True or false: a result on screen is an output. (a) False (b) True
  30. 30.⚙️ What number does this app show?
    let price = 460; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 9; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  32. 32.True or false: typing your age is an output. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) tapping a button (b) working out a tip (c) typing your age (d) speaking a command
  34. 34.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 92; // 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 3 (d) line 4
  36. 36.⚙️ 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 3 (b) line 1 (c) line 2 (d) line 4
  37. 37.⚙️ 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 2 (b) line 1 (c) line 3
  38. 38.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a buzz (vibration) (d) typing your age
  39. 39.Which of these is an input? (a) checking a password (b) sorting the scores (c) a beep sound (d) tapping a button
  40. 40.Which of these is an output? (a) checking a password (b) taking a photo (c) a beep sound (d) typing your age

Answer key

  1. 41
  2. typing your age
  3. input
  4. a buzz (vibration)
  5. 4000
  6. a result on screen
  7. line 3
  8. 50
  9. processing
  10. a pop-up message
  11. output
  12. 10000
  13. 8000
  14. working out a tip
  15. False
  16. line 3
  17. line 3
  18. 175
  19. speaking a command
  20. line 3
  21. adding up a bill
  22. adding up a bill
  23. True
  24. line 3
  25. True
  26. 330
  27. line 3
  28. 510
  29. True
  30. 420
  31. line 2
  32. False
  33. working out a tip
  34. 250
  35. line 3
  36. line 3
  37. line 2
  38. typing your age
  39. tapping a button
  40. a beep sound

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