App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 978 · 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 buzz (vibration) (b) working out a tip (c) a beep sound (d) a pop-up message
2. 2.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
3. 3.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 8; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
4. 4.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
5. 5.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) output (c) processing
6. 6.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) processing (c) input
7. 7.🔍 Which is the odd one out? (a) checking a password (b) a result on screen (c) adding up a bill (d) working out a tip
8. 8.🔍 Which is the odd one out? (a) a beep sound (b) taking a photo (c) a pop-up message (d) a result on screen
9. 9.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
10. 10.True or false: a beep sound is an output. (a) True (b) False
11. 11.True or false: working out a tip is an output. (a) True (b) False
12. 12.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
13. 13.Which of these is processing? (a) speaking a command (b) typing your age (c) a beep sound (d) adding up a bill
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 40; // 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 3 (b) line 4 (c) line 2 (d) line 1
15. 15.Which of these is an input? (a) working out a tip (b) taking a photo (c) sorting the scores (d) a pop-up message
16. 16.True or false: working out a tip is processing. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) speaking a command (d) checking a password
18. 18.True or false: a result on screen is an output. (a) False (b) True
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 110; // 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
20. 20.True or false: adding up a bill is processing. (a) True (b) False
21. 21.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) processing (c) input
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 290; // 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 1 (b) line 3 (c) line 2 (d) line 4
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 99; // 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 1 (b) line 2 (c) line 3 (d) line 4
24. 24.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
25. 25.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) typing your age (d) a beep sound
26. 26.True or false: a pop-up message is an output. (a) True (b) False
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 1 (b) line 3 (c) line 4 (d) line 2
28. 28.True or false: a buzz (vibration) is processing. (a) False (b) True
29. 29.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
30. 30.⚙️ What number does this app show?
    let bill = 148; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 3 (b) line 4 (c) line 2 (d) line 1
32. 32.True or false: a buzz (vibration) is an output. (a) True (b) False
33. 33.⚙️ What number does this app show?
    let bill = 224; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
34. 34.Which of these is processing? (a) checking a password (b) a result on screen (c) typing your age (d) a beep sound
35. 35.⚙️ What number does this app show?
    let bill = 154; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
36. 36.Which of these is an output? (a) working out a tip (b) sorting the scores (c) adding up a bill (d) a pop-up message
37. 37.⚙️ What number does this app show?
    let bill = 90; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
38. 38.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 1 (b) line 2 (c) line 4 (d) line 3
40. 40.⚙️ In an app, is adding up a bill an input, processing or an output? (a) processing (b) input (c) output

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