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App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 407 · 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 km = 14; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  2. 2.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) a result on screen (d) tapping a button
  3. 3.🔍 Which is the odd one out? (a) typing your age (b) a buzz (vibration) (c) a pop-up message (d) a result on screen
  4. 4.True or false: typing your age is an input. (a) False (b) True
  5. 5.Which of these is processing? (a) speaking a command (b) typing your age (c) taking a photo (d) sorting the scores
  6. 6.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) speaking a command (d) a beep sound
  7. 7.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
  8. 8.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  9. 9.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 7; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  10. 10.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
  11. 11.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
  12. 12.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 5; // 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 = 360; // 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
  14. 14.🔍 Which is the odd one out? (a) sorting the scores (b) a pop-up message (c) working out a tip (d) adding up a bill
  15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 204; // 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 3 (b) line 4 (c) line 2 (d) line 1
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // 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 2 (c) line 4 (d) line 3
  17. 17.True or false: taking a photo is an input. (a) False (b) True
  18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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 3 (b) line 1 (c) line 2 (d) line 4
  19. 19.True or false: taking a photo is processing. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) adding up a bill (d) a beep sound
  21. 21.True or false: typing your age is processing. (a) False (b) True
  22. 22.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
  23. 23.⚙️ What number does this app show?
    let bill = 55; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 450; // 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 2 (b) line 3 (c) line 1 (d) line 4
  25. 25.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
  26. 26.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) checking a password (d) speaking a command
  27. 27.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) taking a photo (d) a beep sound
  28. 28.🔍 Which is the odd one out? (a) checking a password (b) working out a tip (c) tapping a button (d) adding up a bill
  29. 29.Which of these is processing? (a) taking a photo (b) a result on screen (c) checking a password (d) tapping a button
  30. 30.⚙️ What number does this app show?
    let bill = 175; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  31. 31.Which of these is an output? (a) a result on screen (b) adding up a bill (c) checking a password (d) tapping a button
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 500; // 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 2 (b) line 4 (c) line 3 (d) line 1
  33. 33.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) output (c) processing
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 1 (c) line 2 (d) line 3
  35. 35.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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 3 (d) line 4
  37. 37.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  38. 38.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  39. 39.True or false: a buzz (vibration) is an input. (a) False (b) True
  40. 40.Which of these is an output? (a) checking a password (b) tapping a button (c) typing your age (d) a buzz (vibration)

Answer key

  1. line 2
  2. a result on screen
  3. typing your age
  4. True
  5. sorting the scores
  6. speaking a command
  7. processing
  8. 195
  9. line 2
  10. 12000
  11. 100
  12. 450
  13. line 3
  14. a pop-up message
  15. line 3
  16. line 3
  17. True
  18. line 3
  19. False
  20. adding up a bill
  21. False
  22. input
  23. 11
  24. line 3
  25. 14000
  26. checking a password
  27. a beep sound
  28. tapping a button
  29. checking a password
  30. 35
  31. a result on screen
  32. line 3
  33. input
  34. line 3
  35. output
  36. line 3
  37. 140
  38. 140
  39. False
  40. a buzz (vibration)

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