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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 448 · 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 a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
  2. 2.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
  3. 3.True or false: a beep sound is an input. (a) False (b) True
  4. 4.🔍 Which is the odd one out? (a) adding up a bill (b) tapping a button (c) working out a tip (d) sorting the scores
  5. 5.Which of these is an input? (a) a buzz (vibration) (b) a result on screen (c) adding up a bill (d) tapping a button
  6. 6.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) sorting the scores
  7. 7.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 2 (c) line 1
  8. 8.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) a beep sound (d) tapping a button
  9. 9.True or false: a result on screen is processing. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) taking a photo (b) tapping a button (c) speaking a command (d) a pop-up message
  11. 11.🔍 Which is the odd one out? (a) taking a photo (b) tapping a button (c) a buzz (vibration) (d) speaking a command
  12. 12.True or false: a buzz (vibration) is processing. (a) True (b) False
  13. 13.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 4 (b) line 3 (c) line 1 (d) line 2
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 4 (c) line 2 (d) line 3
  16. 16.🔍 Which is the odd one out? (a) speaking a command (b) a buzz (vibration) (c) a beep sound (d) a pop-up message
  17. 17.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
  18. 18.⚙️ What number does this app show?
    let bill = 60; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  19. 19.⚙️ What number does this app show?
    let km = 8; // 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 = 124; // 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 3 (c) line 1 (d) line 4
  21. 21.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
  22. 22.Which of these is an output? (a) a result on screen (b) typing your age (c) taking a photo (d) checking a password
  23. 23.True or false: taking a photo is processing. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) a beep sound (d) checking a password
  25. 25.⚙️ 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 1 (b) line 3 (c) line 2
  26. 26.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
  27. 27.⚙️ In an app, is adding up a bill an input, processing or an output? (a) processing (b) input (c) output
  28. 28.⚙️ 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);
  29. 29.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 2 (c) line 3 (d) line 4
  32. 32.⚙️ What number does this app show?
    let price = 170; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 1 (c) line 2 (d) line 3
  34. 34.Which of these is an output? (a) a pop-up message (b) checking a password (c) sorting the scores (d) typing your age
  35. 35.⚙️ 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 2 (b) line 3 (c) line 1
  36. 36.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
  37. 37.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) processing (c) output
  38. 38.⚙️ What number does this app show?
    let price = 580; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  39. 39.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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

Answer key

  1. output
  2. input
  3. False
  4. tapping a button
  5. tapping a button
  6. sorting the scores
  7. line 2
  8. a beep sound
  9. False
  10. a pop-up message
  11. a buzz (vibration)
  12. False
  13. 500
  14. line 3
  15. line 3
  16. speaking a command
  17. input
  18. 30
  19. 8000
  20. line 3
  21. input
  22. a result on screen
  23. False
  24. checking a password
  25. line 2
  26. processing
  27. processing
  28. 61
  29. 15000
  30. line 2
  31. line 3
  32. 140
  33. line 3
  34. a pop-up message
  35. line 2
  36. 6000
  37. input
  38. 540
  39. 10000
  40. line 3

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