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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 973 · 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 beep sound an input, processing or an output? (a) input (b) processing (c) output
  2. 2.🔍 Which is the odd one out? (a) tapping a button (b) a beep sound (c) a buzz (vibration) (d) a pop-up message
  3. 3.True or false: typing your age is an input. (a) False (b) True
  4. 4.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 170; // 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 1 (b) line 3 (c) line 2 (d) line 4
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 4 (c) line 2 (d) line 1
  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 = 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 4 (b) line 3 (c) line 1 (d) line 2
  8. 8.Which of these is an input? (a) a beep sound (b) checking a password (c) typing your age (d) a pop-up message
  9. 9.🔍 Which is the odd one out? (a) a buzz (vibration) (b) working out a tip (c) sorting the scores (d) adding up a bill
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 530; // 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 1 (b) line 4 (c) line 3 (d) line 2
  11. 11.⚙️ What number does this app show?
    let bill = 228; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  12. 12.⚙️ What number does this app show?
    let price = 45; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 3 (b) line 2 (c) line 4 (d) line 1
  14. 14.True or false: a pop-up message is an output. (a) True (b) False
  15. 15.⚙️ What number does this app show?
    let bill = 84; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  16. 16.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  17. 17.True or false: taking a photo is an output. (a) False (b) True
  18. 18.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
  19. 19.Which of these is an input? (a) adding up a bill (b) speaking a command (c) a result on screen (d) a buzz (vibration)
  20. 20.Which of these is an output? (a) tapping a button (b) typing your age (c) a beep sound (d) speaking a command
  21. 21.True or false: checking a password is an output. (a) False (b) True
  22. 22.Which of these is an input? (a) a pop-up message (b) adding up a bill (c) tapping a button (d) working out a tip
  23. 23.🔍 Which is the odd one out? (a) speaking a command (b) working out a tip (c) taking a photo (d) typing your age
  24. 24.True or false: sorting the scores is an input. (a) False (b) True
  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 2 (c) line 3 (d) line 1
  26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 310; // 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
  27. 27.Which of these is processing? (a) a buzz (vibration) (b) a beep sound (c) speaking a command (d) adding up a bill
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 177; // 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 1 (b) line 2 (c) line 3 (d) line 4
  29. 29.🔍 Which is the odd one out? (a) taking a photo (b) a beep sound (c) a buzz (vibration) (d) a result on screen
  30. 30.Which of these is an output? (a) tapping a button (b) working out a tip (c) typing your age (d) a result on screen
  31. 31.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 4 (c) line 2 (d) line 3
  33. 33.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) input (c) output
  34. 34.🔍 Which is the odd one out? (a) speaking a command (b) typing your age (c) taking a photo (d) adding up a bill
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 550; // 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 1 (b) line 3 (c) line 4 (d) line 2
  37. 37.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 75; // 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 4 (c) line 1 (d) line 3
  39. 39.⚙️ 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
  40. 40.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output

Answer key

  1. output
  2. tapping a button
  3. True
  4. line 3
  5. line 3
  6. a result on screen
  7. line 3
  8. typing your age
  9. a buzz (vibration)
  10. line 3
  11. 57
  12. 135
  13. line 3
  14. True
  15. 42
  16. 90
  17. False
  18. input
  19. speaking a command
  20. a beep sound
  21. False
  22. tapping a button
  23. working out a tip
  24. False
  25. line 3
  26. line 3
  27. adding up a bill
  28. line 3
  29. taking a photo
  30. a result on screen
  31. 260
  32. line 3
  33. input
  34. adding up a bill
  35. line 2
  36. line 3
  37. 2000
  38. line 3
  39. line 2
  40. output

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