App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 743 · 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 of these is processing? (a) typing your age (b) checking a password (c) a pop-up message (d) taking a photo
2. 2.⚙️ What number does this app show?
   let bill = 310; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
3. 3.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 120; // 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 3 (c) line 1 (d) line 4
4. 4.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) sorting the scores (d) taking a photo
5. 5.True or false: checking a password is an output. (a) True (b) False
6. 6.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
7. 7.Which of these is an input? (a) checking a password (b) a pop-up message (c) a beep sound (d) taking a photo
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 490; // 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 4 (b) line 2 (c) line 3 (d) line 1
9. 9.Which of these is an input? (a) a buzz (vibration) (b) speaking a command (c) a beep sound (d) checking a password
10. 10.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
11. 11.⚙️ What number does this app show?
    let bill = 46; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 560; // 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 3 (c) line 4 (d) line 1
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 4 (b) line 2 (c) line 3 (d) line 1
14. 14.⚙️ What number does this app show?
    let price = 430; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.Which of these is processing? (a) working out a tip (b) a pop-up message (c) a result on screen (d) taking a photo
16. 16.True or false: working out a tip is an output. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) tapping a button (d) adding up a bill
18. 18.Which of these is an output? (a) a pop-up message (b) sorting the scores (c) typing your age (d) working out a tip
19. 19.True or false: typing your age is an input. (a) True (b) False
20. 20.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 400; // 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 3 (b) line 2 (c) line 1 (d) line 4
22. 22.⚙️ What number does this app show?
    let bill = 48; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
23. 23.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) a pop-up message (d) tapping a button
24. 24.True or false: a result on screen is an output. (a) False (b) True
25. 25.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
26. 26.⚙️ What number does this app show?
    let price = 540; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 2 (c) line 1 (d) line 3
28. 28.⚙️ 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 2 (c) line 3
29. 29.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) a pop-up message (d) tapping a button
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // 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 2 (c) line 3 (d) line 1
31. 31.🔍 Which is the odd one out? (a) adding up a bill (b) typing your age (c) working out a tip (d) sorting the scores
32. 32.Which of these is an output? (a) working out a tip (b) typing your age (c) tapping a button (d) a beep sound
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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
34. 34.🔍 Which is the odd one out? (a) a buzz (vibration) (b) speaking a command (c) tapping a button (d) typing your age
35. 35.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
36. 36.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
37. 37.🔍 Which is the odd one out? (a) typing your age (b) a beep sound (c) tapping a button (d) taking a photo
38. 38.Which of these is processing? (a) tapping a button (b) taking a photo (c) a beep sound (d) sorting the scores
39. 39.Which of these is processing? (a) a beep sound (b) a result on screen (c) adding up a bill (d) tapping a button
40. 40.True or false: checking a password is processing. (a) False (b) True

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