App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 473 · 40 questions

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.

1. 1.🔍 Which is the odd one out? (a) a beep sound (b) taking a photo (c) a result on screen (d) a buzz (vibration)
2. 2.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
3. 3.⚙️ What number does this app show?
   let price = 45; // typed by the user
   let qty = 2; // typed by the user
   let total = price * qty;
   show(total);
4. 4.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 340; // 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 4 (c) line 3 (d) line 1
5. 5.⚙️ What number does this app show?
   let price = 460; // typed by the user
   let off = 10; // typed by the user
   let pay = price - off;
   show(pay);
6. 6.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
7. 7.⚙️ 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);
8. 8.True or false: checking a password is processing. (a) False (b) True
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 360; // 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 4 (d) line 1
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 171; // 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 2 (c) line 1 (d) line 3
11. 11.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
12. 12.Which of these is an output? (a) taking a photo (b) checking a password (c) speaking a command (d) a beep sound
13. 13.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
14. 14.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
15. 15.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) processing (c) input
16. 16.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) checking a password (d) working out a tip
17. 17.True or false: adding up a bill is an output. (a) False (b) True
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // typed by the user
    line 2: let qty = 5; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 1 (b) line 3 (c) line 4 (d) line 2
19. 19.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
20. 20.Which of these is an input? (a) a pop-up message (b) adding up a bill (c) speaking a command (d) sorting the scores
21. 21.True or false: adding up a bill is processing. (a) True (b) False
22. 22.⚙️ What number does this app show?
    let bill = 84; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
23. 23.⚙️ What number does this app show?
    let bill = 350; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
24. 24.Which of these is an output? (a) typing your age (b) tapping a button (c) checking a password (d) a result on screen
25. 25.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
26. 26.⚙️ 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 2 (c) line 1
27. 27.⚙️ What number does this app show?
    let bill = 34; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
28. 28.⚙️ What number does this app show?
    let price = 290; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
29. 29.⚙️ 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);
30. 30.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) checking a password (d) a result on screen
31. 31.Which of these is processing? (a) working out a tip (b) speaking a command (c) a beep sound (d) a buzz (vibration)
32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 2 (b) line 3 (c) line 4 (d) line 1
33. 33.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
34. 34.True or false: a buzz (vibration) is an output. (a) False (b) True
35. 35.⚙️ What number does this app show?
    let bill = 122; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
36. 36.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
37. 37.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) working out a tip (d) a pop-up message
38. 38.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
39. 39.⚙️ What number does this app show?
    let bill = 54; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
40. 40.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) processing (c) output

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