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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 405 · 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 speaking a command an input, processing or an output? (a) processing (b) output (c) input
  2. 2.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
  3. 3.⚙️ What number does this app show?
    let price = 500; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
  4. 4.🔍 Which is the odd one out? (a) checking a password (b) a beep sound (c) sorting the scores (d) adding up a bill
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // typed by the user
    line 2: let qty = 2; // 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
  6. 6.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 111; // 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 2 (b) line 4 (c) line 3 (d) line 1
  7. 7.⚙️ What number does this app show?
    let bill = 20; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  8. 8.Which of these is processing? (a) speaking a command (b) a buzz (vibration) (c) typing your age (d) working out a tip
  9. 9.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
  10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 60; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 3 (b) line 2 (c) line 4 (d) line 1
  11. 11.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  12. 12.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) typing your age (d) checking a password
  13. 13.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
  14. 14.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
  15. 15.True or false: a buzz (vibration) is an input. (a) True (b) False
  16. 16.🔍 Which is the odd one out? (a) a result on screen (b) sorting the scores (c) a beep sound (d) a pop-up message
  17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 3 (b) line 1 (c) line 4 (d) line 2
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 110; // 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 1 (b) line 2 (c) line 4 (d) line 3
  19. 19.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
  20. 20.⚙️ 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 1 (b) line 3 (c) line 2
  21. 21.⚙️ What number does this app show?
    let price = 170; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 171; // 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 2 (b) line 4 (c) line 1 (d) line 3
  23. 23.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
  24. 24.True or false: sorting the scores is an input. (a) True (b) False
  25. 25.Which of these is an input? (a) adding up a bill (b) typing your age (c) a result on screen (d) working out a tip
  26. 26.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
  27. 27.⚙️ 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);
  28. 28.⚙️ What number does this app show?
    let bill = 141; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  29. 29.Which of these is processing? (a) a beep sound (b) sorting the scores (c) speaking a command (d) taking a photo
  30. 30.Which of these is an output? (a) tapping a button (b) a buzz (vibration) (c) speaking a command (d) checking a password
  31. 31.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
  32. 32.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  33. 33.🔍 Which is the odd one out? (a) a beep sound (b) speaking a command (c) a pop-up message (d) a result on screen
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 115; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  35. 35.⚙️ What number does this app show?
    let price = 380; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  36. 36.⚙️ What number does this app show?
    let bill = 90; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  37. 37.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) tapping a button (d) a beep sound
  38. 38.True or false: speaking a command is processing. (a) True (b) False
  39. 39.⚙️ 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 2 (d) line 4
  40. 40.⚙️ What number does this app show?
    let bill = 185; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);

Answer key

  1. input
  2. output
  3. 480
  4. a beep sound
  5. line 3
  6. line 3
  7. 10
  8. working out a tip
  9. output
  10. line 3
  11. input
  12. typing your age
  13. 3000
  14. 2000
  15. False
  16. sorting the scores
  17. line 3
  18. line 3
  19. 6000
  20. line 2
  21. 130
  22. line 3
  23. processing
  24. False
  25. typing your age
  26. input
  27. 90
  28. 47
  29. sorting the scores
  30. a buzz (vibration)
  31. processing
  32. 4000
  33. speaking a command
  34. line 3
  35. 370
  36. 45
  37. tapping a button
  38. False
  39. line 3
  40. 37

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