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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 161 · 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.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 64; // 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 1 (b) line 4 (c) line 2 (d) line 3
  2. 2.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
  3. 3.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 380; // 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 3 (c) line 1 (d) line 2
  4. 4.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
  5. 5.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
  6. 6.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 58; // 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
  7. 7.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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 4 (c) line 2 (d) line 1
  8. 8.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) adding up a bill (d) a result on screen
  9. 9.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) a result on screen (d) checking a password
  10. 10.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
  11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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
  12. 12.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) a buzz (vibration) (d) taking a photo
  13. 13.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
  14. 14.⚙️ What number does this app show?
    let bill = 183; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 2 (d) line 1
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 122; // 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 4 (c) line 3 (d) line 1
  17. 17.⚙️ What number does this app show?
    let bill = 280; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  18. 18.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  19. 19.True or false: checking a password is processing. (a) False (b) True
  20. 20.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) a buzz (vibration) (d) sorting the scores
  21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 320; // 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
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 10; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 1 (b) line 3 (c) line 2
  23. 23.Which of these is an input? (a) typing your age (b) a pop-up message (c) adding up a bill (d) checking a password
  24. 24.True or false: sorting the scores is processing. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) speaking a command (b) adding up a bill (c) sorting the scores (d) checking a password
  26. 26.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  27. 27.Which of these is an input? (a) speaking a command (b) a pop-up message (c) a buzz (vibration) (d) a beep sound
  28. 28.⚙️ What number does this app show?
    let bill = 26; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  29. 29.⚙️ 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 1 (b) line 3 (c) line 2
  30. 30.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
  31. 31.True or false: a pop-up message is processing. (a) False (b) True
  32. 32.True or false: tapping a button is processing. (a) True (b) False
  33. 33.⚙️ What number does this app show?
    let bill = 33; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  34. 34.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  35. 35.True or false: a buzz (vibration) is an output. (a) True (b) False
  36. 36.True or false: a buzz (vibration) is processing. (a) False (b) True
  37. 37.True or false: speaking a command is an input. (a) True (b) False
  38. 38.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) a beep sound (d) taking a photo
  39. 39.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) processing (c) input
  40. 40.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);

Answer key

  1. line 3
  2. input
  3. line 3
  4. input
  5. processing
  6. line 3
  7. line 3
  8. a result on screen
  9. checking a password
  10. 7000
  11. line 3
  12. a buzz (vibration)
  13. processing
  14. 61
  15. line 3
  16. line 3
  17. 70
  18. 100
  19. True
  20. sorting the scores
  21. line 3
  22. line 2
  23. typing your age
  24. True
  25. speaking a command
  26. 12000
  27. speaking a command
  28. 13
  29. line 2
  30. output
  31. False
  32. False
  33. 11
  34. input
  35. True
  36. False
  37. True
  38. a beep sound
  39. output
  40. 300

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