App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 891 · 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) checking a password (c) taking a photo (d) adding up a bill
2. 2.🔍 Which is the odd one out? (a) sorting the scores (b) speaking a command (c) tapping a button (d) typing your age
3. 3.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) processing (c) output
4. 4.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) typing your age (d) a pop-up message
5. 5.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) typing your age (d) working out a tip
6. 6.True or false: a result on screen is processing. (a) False (b) True
7. 7.Which of these is an input? (a) a pop-up message (b) adding up a bill (c) sorting the scores (d) tapping a button
8. 8.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 80; // 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 4 (b) line 1 (c) line 2 (d) line 3
10. 10.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
11. 11.Which of these is an output? (a) a pop-up message (b) sorting the scores (c) working out a tip (d) checking a password
12. 12.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
13. 13.🔍 Which is the odd one out? (a) adding up a bill (b) a buzz (vibration) (c) checking a password (d) working out a tip
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 45; // 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 2 (b) line 3 (c) line 1 (d) line 4
15. 15.True or false: speaking a command is an input. (a) False (b) True
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 15; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 120; // 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
18. 18.Which of these is an input? (a) working out a tip (b) typing your age (c) sorting the scores (d) a result on screen
19. 19.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
20. 20.⚙️ What number does this app show?
    let bill = 275; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
21. 21.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) output (c) processing
22. 22.True or false: speaking a command is an output. (a) True (b) False
23. 23.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
24. 24.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
25. 25.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
26. 26.⚙️ What number does this app show?
    let price = 560; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
27. 27.Which of these is processing? (a) typing your age (b) checking a password (c) a pop-up message (d) speaking a command
28. 28.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) adding up a bill (d) a result on screen
29. 29.True or false: typing your age is an input. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) speaking a command (b) adding up a bill (c) tapping a button (d) typing your age
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 160; // 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 3 (b) line 1 (c) line 2 (d) line 4
32. 32.⚙️ 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);
33. 33.True or false: sorting the scores is processing. (a) False (b) True
34. 34.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
36. 36.⚙️ What number does this app show?
    let km = 13; // typed by the user
    let metres = km * 1000;
    show(metres);
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 1 (c) line 4 (d) line 3
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 9; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
39. 39.Which of these is processing? (a) working out a tip (b) taking a photo (c) a result on screen (d) a pop-up message
40. 40.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);

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