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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 579 · 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 tapping a button an input, processing or an output? (a) output (b) input (c) processing
  2. 2.⚙️ What number does this app show?
    let bill = 172; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  3. 3.True or false: typing your age is an input. (a) True (b) False
  4. 4.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) output (c) input
  5. 5.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) output (c) input
  6. 6.🔍 Which is the odd one out? (a) taking a photo (b) a buzz (vibration) (c) a pop-up message (d) a result on screen
  7. 7.⚙️ What number does this app show?
    let price = 220; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  8. 8.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 15; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 3 (c) line 1
  9. 9.⚙️ 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);
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 40; // 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 4 (d) line 3
  11. 11.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
  12. 12.⚙️ 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 3 (b) line 1 (c) line 2
  13. 13.True or false: speaking a command is an input. (a) False (b) True
  14. 14.True or false: a pop-up message is processing. (a) True (b) False
  15. 15.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) a buzz (vibration) (d) sorting the scores
  16. 16.Which of these is processing? (a) typing your age (b) working out a tip (c) taking a photo (d) a result on screen
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 210; // 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 2 (c) line 3 (d) line 1
  18. 18.True or false: adding up a bill is an input. (a) False (b) True
  19. 19.True or false: a beep sound is an output. (a) False (b) True
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 540; // 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
  21. 21.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  22. 22.True or false: working out a tip is processing. (a) False (b) True
  23. 23.Which of these is an input? (a) typing your age (b) sorting the scores (c) a pop-up message (d) checking a password
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 106; // 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 4 (d) line 1
  25. 25.Which of these is an input? (a) working out a tip (b) checking a password (c) tapping a button (d) a beep sound
  26. 26.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  27. 27.⚙️ 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 3 (b) line 2 (c) line 4 (d) line 1
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 132; // 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 4 (b) line 1 (c) line 2 (d) line 3
  29. 29.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) typing your age (d) a pop-up message
  30. 30.⚙️ 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);
  31. 31.⚙️ What number does this app show?
    let price = 340; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 25; // 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
  33. 33.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) adding up a bill (d) a pop-up message
  34. 34.Which of these is processing? (a) sorting the scores (b) typing your age (c) tapping a button (d) a pop-up message
  35. 35.⚙️ 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 2 (b) line 1 (c) line 3 (d) line 4
  36. 36.True or false: speaking a command is an output. (a) True (b) False
  37. 37.Which of these is an output? (a) sorting the scores (b) adding up a bill (c) a pop-up message (d) typing your age
  38. 38.True or false: checking a password is an output. (a) True (b) False
  39. 39.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
  40. 40.Which of these is processing? (a) a pop-up message (b) checking a password (c) taking a photo (d) typing your age

Answer key

  1. input
  2. 43
  3. True
  4. output
  5. output
  6. taking a photo
  7. 180
  8. line 2
  9. 15
  10. line 3
  11. output
  12. line 2
  13. True
  14. False
  15. a buzz (vibration)
  16. working out a tip
  17. line 3
  18. False
  19. True
  20. line 3
  21. 270
  22. True
  23. typing your age
  24. line 3
  25. tapping a button
  26. 120
  27. line 3
  28. line 3
  29. typing your age
  30. 210
  31. 320
  32. line 3
  33. a pop-up message
  34. sorting the scores
  35. line 3
  36. False
  37. a pop-up message
  38. False
  39. processing
  40. checking a password

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