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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 651 · 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 = 48; // 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
  2. 2.True or false: sorting the scores is processing. (a) True (b) False
  3. 3.🔍 Which is the odd one out? (a) typing your age (b) a result on screen (c) taking a photo (d) speaking a command
  4. 4.True or false: a pop-up message is an output. (a) True (b) False
  5. 5.Which of these is an input? (a) a pop-up message (b) checking a password (c) typing your age (d) sorting the scores
  6. 6.⚙️ What number does this app show?
    let bill = 130; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  7. 7.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
  8. 8.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 95; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 2 (b) line 3 (c) line 4 (d) line 1
  9. 9.🔍 Which is the odd one out? (a) adding up a bill (b) tapping a button (c) working out a tip (d) sorting the scores
  10. 10.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  11. 11.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) a pop-up message (d) tapping a button
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 310; // 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 2 (b) line 1 (c) line 4 (d) line 3
  13. 13.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  14. 14.⚙️ What number does this app show?
    let bill = 245; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  15. 15.⚙️ What number does this app show?
    let bill = 96; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  16. 16.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) speaking a command (d) a buzz (vibration)
  17. 17.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 1 (b) line 4 (c) line 3 (d) line 2
  19. 19.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
  20. 20.Which of these is an output? (a) taking a photo (b) typing your age (c) a pop-up message (d) adding up a bill
  21. 21.True or false: speaking a command is an input. (a) False (b) True
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 192; // 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 3 (c) line 2 (d) line 4
  23. 23.Which of these is processing? (a) adding up a bill (b) a beep sound (c) taking a photo (d) a buzz (vibration)
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 175; // 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 3 (c) line 1 (d) line 2
  25. 25.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) taking a photo (d) a beep sound
  26. 26.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
  27. 27.Which of these is an output? (a) taking a photo (b) tapping a button (c) a beep sound (d) adding up a bill
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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 3 (b) line 1 (c) line 2 (d) line 4
  29. 29.True or false: taking a photo is an input. (a) False (b) True
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 94; // 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 2 (c) line 3 (d) line 1
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 280; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 1 (b) line 2 (c) line 3 (d) line 4
  32. 32.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 4; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  34. 34.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
  35. 35.Which of these is an input? (a) taking a photo (b) a pop-up message (c) sorting the scores (d) adding up a bill
  36. 36.True or false: working out a tip is an input. (a) False (b) True
  37. 37.⚙️ 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);
  38. 38.⚙️ What number does this app show?
    let bill = 145; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  39. 39.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  40. 40.True or false: speaking a command is an output. (a) False (b) True

Answer key

  1. line 3
  2. True
  3. a result on screen
  4. True
  5. typing your age
  6. 65
  7. output
  8. line 3
  9. tapping a button
  10. input
  11. a pop-up message
  12. line 3
  13. 120
  14. 49
  15. 24
  16. speaking a command
  17. 150
  18. line 3
  19. input
  20. a pop-up message
  21. True
  22. line 3
  23. adding up a bill
  24. line 3
  25. taking a photo
  26. output
  27. a beep sound
  28. line 3
  29. True
  30. line 3
  31. line 3
  32. 11000
  33. line 2
  34. processing
  35. taking a photo
  36. False
  37. 135
  38. 29
  39. 180
  40. False

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