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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 346 · 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 line does the processing (works out the answer)?
    line 1: let price = 560; // 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 4 (c) line 1 (d) line 2
  2. 2.⚙️ 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 1 (b) line 3 (c) line 2 (d) line 4
  3. 3.🔍 Which is the odd one out? (a) a pop-up message (b) a buzz (vibration) (c) checking a password (d) a result on screen
  4. 4.🔍 Which is the odd one out? (a) a result on screen (b) typing your age (c) a beep sound (d) a pop-up message
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 4 (d) line 3
  6. 6.Which of these is an output? (a) taking a photo (b) sorting the scores (c) speaking a command (d) a beep sound
  7. 7.True or false: sorting the scores is an input. (a) False (b) True
  8. 8.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 2 (c) line 4 (d) line 3
  9. 9.🔍 Which is the odd one out? (a) working out a tip (b) sorting the scores (c) checking a password (d) a beep sound
  10. 10.⚙️ What number does this app show?
    let price = 350; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  11. 11.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a buzz (vibration) (d) adding up a bill
  12. 12.⚙️ 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);
  13. 13.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  14. 14.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) a result on screen (d) adding up a bill
  15. 15.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) output (c) processing
  16. 16.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 150; // typed by the user
    line 2: let off = 30; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  18. 18.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output
  19. 19.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 248; // 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 2 (b) line 1 (c) line 4 (d) line 3
  21. 21.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
  22. 22.⚙️ What number does this app show?
    let price = 330; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  23. 23.Which of these is processing? (a) a beep sound (b) checking a password (c) speaking a command (d) typing your age
  24. 24.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) input (c) output
  25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 45; // 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 4 (b) line 1 (c) line 2 (d) line 3
  26. 26.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
  27. 27.Which of these is an input? (a) working out a tip (b) a pop-up message (c) a buzz (vibration) (d) speaking a command
  28. 28.True or false: typing your age is processing. (a) True (b) False
  29. 29.🔍 Which is the odd one out? (a) working out a tip (b) adding up a bill (c) sorting the scores (d) tapping a button
  30. 30.⚙️ 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 4 (b) line 3 (c) line 1 (d) line 2
  31. 31.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
  32. 32.🔍 Which is the odd one out? (a) speaking a command (b) tapping a button (c) taking a photo (d) working out a tip
  33. 33.True or false: adding up a bill is processing. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) checking a password (d) a buzz (vibration)
  35. 35.⚙️ 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 2 (b) line 3 (c) line 1
  36. 36.True or false: a beep sound is processing. (a) True (b) False
  37. 37.⚙️ What number does this app show?
    let bill = 60; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  38. 38.Which of these is processing? (a) a beep sound (b) taking a photo (c) typing your age (d) sorting the scores
  39. 39.True or false: a beep sound is an output. (a) True (b) False
  40. 40.True or false: taking a photo is an input. (a) False (b) True

Answer key

  1. line 3
  2. line 3
  3. checking a password
  4. typing your age
  5. line 3
  6. a beep sound
  7. False
  8. line 3
  9. a beep sound
  10. 340
  11. adding up a bill
  12. 50
  13. 210
  14. a result on screen
  15. output
  16. input
  17. line 3
  18. output
  19. 2000
  20. line 3
  21. processing
  22. 280
  23. checking a password
  24. output
  25. line 3
  26. processing
  27. speaking a command
  28. False
  29. tapping a button
  30. line 3
  31. 6000
  32. working out a tip
  33. True
  34. a buzz (vibration)
  35. line 2
  36. False
  37. 15
  38. sorting the scores
  39. True
  40. True

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