← Input, processing and output lesson New set →

App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 236 · 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 checking a password an input, processing or an output? (a) output (b) input (c) processing
  2. 2.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
  3. 3.🔍 Which is the odd one out? (a) typing your age (b) adding up a bill (c) speaking a command (d) taking a photo
  4. 4.Which of these is an output? (a) adding up a bill (b) speaking a command (c) a buzz (vibration) (d) working out a tip
  5. 5.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
  6. 6.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) working out a tip (d) a beep sound
  7. 7.True or false: speaking a command is processing. (a) True (b) False
  8. 8.⚙️ 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 3 (b) line 1 (c) line 2
  9. 9.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
  10. 10.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
  11. 11.⚙️ What number does this app show?
    let price = 250; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  12. 12.True or false: a pop-up message is an input. (a) True (b) False
  13. 13.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 350; // 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 3 (c) line 2 (d) line 4
  15. 15.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
  16. 16.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
  17. 17.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) output (c) input
  18. 18.🔍 Which is the odd one out? (a) typing your age (b) sorting the scores (c) taking a photo (d) speaking a command
  19. 19.True or false: a pop-up message is an output. (a) True (b) False
  20. 20.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
  21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 1 (c) line 3 (d) line 2
  22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 3 (b) line 1 (c) line 2
  23. 23.🔍 Which is the odd one out? (a) a pop-up message (b) a buzz (vibration) (c) taking a photo (d) a beep sound
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 1 (c) line 4 (d) line 3
  25. 25.Which of these is an input? (a) speaking a command (b) working out a tip (c) a beep sound (d) a buzz (vibration)
  26. 26.True or false: working out a tip is processing. (a) False (b) True
  27. 27.⚙️ What number does this app show?
    let price = 420; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  28. 28.True or false: adding up a bill is processing. (a) True (b) False
  29. 29.⚙️ What number does this app show?
    let bill = 42; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  30. 30.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
  31. 31.Which of these is an output? (a) tapping a button (b) adding up a bill (c) typing your age (d) a beep sound
  32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 3 (b) line 4 (c) line 2 (d) line 1
  33. 33.⚙️ What number does this app show?
    let price = 180; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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
  35. 35.⚙️ What number does this app show?
    let bill = 102; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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 4 (c) line 2 (d) line 1
  37. 37.Which of these is an output? (a) adding up a bill (b) working out a tip (c) taking a photo (d) a pop-up message
  38. 38.True or false: a beep sound is an input. (a) True (b) False
  39. 39.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 70; // 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 1 (b) line 3 (c) line 4 (d) line 2

Answer key

  1. processing
  2. 2000
  3. adding up a bill
  4. a buzz (vibration)
  5. output
  6. working out a tip
  7. False
  8. line 2
  9. 425
  10. 11000
  11. 240
  12. False
  13. 285
  14. line 3
  15. input
  16. 300
  17. input
  18. sorting the scores
  19. True
  20. 4000
  21. line 3
  22. line 2
  23. taking a photo
  24. line 3
  25. speaking a command
  26. True
  27. 410
  28. True
  29. 14
  30. 60
  31. a beep sound
  32. line 3
  33. 150
  34. line 3
  35. 51
  36. line 3
  37. a pop-up message
  38. False
  39. input
  40. line 3

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students