← Input, processing and output lesson New set →

App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 533 · 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 price = 140; // 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
  2. 2.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
  3. 3.⚙️ 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);
  4. 4.Which of these is an output? (a) sorting the scores (b) taking a photo (c) a pop-up message (d) working out a tip
  5. 5.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) speaking a command (d) a pop-up message
  6. 6.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
  7. 7.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
  8. 8.🔍 Which is the odd one out? (a) tapping a button (b) sorting the scores (c) working out a tip (d) checking a password
  9. 9.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
  10. 10.True or false: a pop-up message is an output. (a) False (b) True
  11. 11.Which of these is processing? (a) a pop-up message (b) taking a photo (c) working out a tip (d) speaking a command
  12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 236; // 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 2 (b) line 3 (c) line 1 (d) line 4
  13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 3 (c) line 1 (d) line 4
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 46; // 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 2 (c) line 3 (d) line 4
  15. 15.Which of these is processing? (a) a beep sound (b) typing your age (c) a pop-up message (d) adding up a bill
  16. 16.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
  17. 17.⚙️ What number does this app show?
    let price = 190; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  18. 18.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
  19. 19.🔍 Which is the odd one out? (a) a beep sound (b) taking a photo (c) typing your age (d) tapping a button
  20. 20.⚙️ What number does this app show?
    let bill = 72; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  21. 21.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
  22. 22.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
  23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 375; // 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 2 (d) line 4
  24. 24.🔍 Which is the odd one out? (a) speaking a command (b) adding up a bill (c) tapping a button (d) taking a photo
  25. 25.True or false: speaking a command is an input. (a) False (b) True
  26. 26.⚙️ What number does this app show?
    let price = 120; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 135; // 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 4 (b) line 3 (c) line 2 (d) line 1
  28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 204; // 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 4 (d) line 2
  29. 29.True or false: adding up a bill is an input. (a) False (b) True
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 580; // 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
  31. 31.⚙️ 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 2 (b) line 1 (c) line 4 (d) line 3
  32. 32.Which of these is an input? (a) a pop-up message (b) typing your age (c) a beep sound (d) a result on screen
  33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 162; // 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 4 (b) line 3 (c) line 1 (d) line 2
  34. 34.⚙️ What number does this app show?
    let bill = 150; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  35. 35.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
  36. 36.Which of these is an output? (a) tapping a button (b) typing your age (c) a beep sound (d) speaking a command
  37. 37.True or false: typing your age is processing. (a) False (b) True
  38. 38.True or false: tapping a button is an input. (a) False (b) True
  39. 39.True or false: working out a tip is processing. (a) True (b) False
  40. 40.Which of these is processing? (a) checking a password (b) a pop-up message (c) taking a photo (d) tapping a button

Answer key

  1. line 3
  2. input
  3. 100
  4. a pop-up message
  5. a pop-up message
  6. processing
  7. output
  8. tapping a button
  9. output
  10. True
  11. working out a tip
  12. line 3
  13. line 3
  14. line 3
  15. adding up a bill
  16. output
  17. 180
  18. 170
  19. a beep sound
  20. 24
  21. 200
  22. processing
  23. line 3
  24. adding up a bill
  25. True
  26. 110
  27. line 3
  28. line 3
  29. False
  30. line 3
  31. line 3
  32. typing your age
  33. line 3
  34. 50
  35. 5000
  36. a beep sound
  37. False
  38. True
  39. True
  40. checking a password

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