App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 679 · 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) working out a tip (b) typing your age (c) tapping a button (d) taking a photo
2. 2.⚙️ What number does this app show?
   let price = 50; // typed by the user
   let qty = 3; // typed by the user
   let total = price * qty;
   show(total);
3. 3.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
4. 4.Which of these is an input? (a) working out a tip (b) a result on screen (c) a buzz (vibration) (d) speaking a command
5. 5.True or false: sorting the scores is processing. (a) False (b) True
6. 6.True or false: working out a tip is processing. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) taking a photo (d) adding up a bill
8. 8.⚙️ What number does this app show?
   let km = 14; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.True or false: checking a password is an input. (a) False (b) True
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 1 (c) line 3
11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 275; // 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 1 (c) line 3 (d) line 2
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 3 (c) line 4 (d) line 2
13. 13.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
14. 14.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
15. 15.Which of these is processing? (a) a buzz (vibration) (b) adding up a bill (c) tapping a button (d) typing your age
16. 16.Which of these is processing? (a) a beep sound (b) a result on screen (c) a pop-up message (d) checking a password
17. 17.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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
19. 19.Which of these is an output? (a) a result on screen (b) speaking a command (c) sorting the scores (d) adding up a bill
20. 20.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
21. 21.Which of these is an output? (a) a buzz (vibration) (b) typing your age (c) speaking a command (d) sorting the scores
22. 22.Which of these is an input? (a) tapping a button (b) sorting the scores (c) a buzz (vibration) (d) checking a password
23. 23.Which of these is an input? (a) a pop-up message (b) a buzz (vibration) (c) typing your age (d) sorting the scores
24. 24.🔍 Which is the odd one out? (a) typing your age (b) a buzz (vibration) (c) a beep sound (d) a result on screen
25. 25.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
26. 26.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) processing (c) input
27. 27.True or false: a beep sound is processing. (a) False (b) True
28. 28.True or false: adding up a bill is an output. (a) False (b) True
29. 29.⚙️ What number does this app show?
    let bill = 99; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
30. 30.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
31. 31.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
32. 32.⚙️ What number does this app show?
    let price = 550; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
33. 33.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
34. 34.⚙️ What number does this app show?
    let price = 330; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
35. 35.True or false: adding up a bill is an input. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) taking a photo (b) a pop-up message (c) tapping a button (d) typing your age
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 530; // 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 4 (c) line 3 (d) line 2
38. 38.True or false: a buzz (vibration) is an output. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a pop-up message (b) a result on screen (c) tapping a button (d) a beep sound
40. 40.Which of these is an output? (a) a pop-up message (b) taking a photo (c) adding up a bill (d) typing your age

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