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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 714 · 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 = 60; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  2. 2.Which of these is processing? (a) typing your age (b) a beep sound (c) adding up a bill (d) a pop-up message
  3. 3.Which of these is an output? (a) a pop-up message (b) typing your age (c) checking a password (d) sorting the scores
  4. 4.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  5. 5.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
  6. 6.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) output (c) processing
  7. 7.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
  8. 8.⚙️ What number does this app show?
    let bill = 120; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  9. 9.⚙️ 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 4 (b) line 3 (c) line 1 (d) line 2
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 150; // 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 1 (c) line 2 (d) line 4
  11. 11.Which of these is processing? (a) taking a photo (b) a beep sound (c) working out a tip (d) tapping a button
  12. 12.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
  13. 13.True or false: tapping a button is an input. (a) True (b) False
  14. 14.⚙️ What number does this app show?
    let bill = 201; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  15. 15.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  16. 16.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
  17. 17.🔍 Which is the odd one out? (a) working out a tip (b) adding up a bill (c) sorting the scores (d) taking a photo
  18. 18.Which of these is an input? (a) a pop-up message (b) taking a photo (c) adding up a bill (d) a beep sound
  19. 19.⚙️ 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 3 (c) line 1 (d) line 4
  20. 20.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
  21. 21.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) a result on screen (d) speaking a command
  22. 22.True or false: speaking a command is processing. (a) True (b) False
  23. 23.Which of these is an output? (a) typing your age (b) a buzz (vibration) (c) speaking a command (d) tapping a button
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 80; // 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 1 (c) line 3 (d) line 2
  25. 25.True or false: a buzz (vibration) is processing. (a) False (b) True
  26. 26.⚙️ 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 2 (b) line 3 (c) line 1
  27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 340; // typed by the user
    line 2: let off = 50; // 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
  28. 28.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  29. 29.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  30. 30.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) a result on screen (d) working out a tip
  31. 31.True or false: sorting the scores is processing. (a) False (b) True
  32. 32.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a beep sound (d) tapping a button
  33. 33.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
  34. 34.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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 1 (b) line 2 (c) line 4 (d) line 3
  36. 36.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  37. 37.Which of these is an output? (a) speaking a command (b) tapping a button (c) checking a password (d) a beep sound
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 3 (c) line 1
  39. 39.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  40. 40.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing

Answer key

  1. 20
  2. adding up a bill
  3. a pop-up message
  4. 400
  5. output
  6. input
  7. processing
  8. 30
  9. line 3
  10. line 3
  11. working out a tip
  12. output
  13. True
  14. 67
  15. 100
  16. 14000
  17. taking a photo
  18. taking a photo
  19. line 3
  20. input
  21. speaking a command
  22. False
  23. a buzz (vibration)
  24. line 3
  25. False
  26. line 2
  27. line 3
  28. 60
  29. 190
  30. a result on screen
  31. True
  32. tapping a button
  33. output
  34. 240
  35. line 3
  36. 570
  37. a beep sound
  38. line 2
  39. 3000
  40. input

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