App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 262 · 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.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
2. 2.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) processing (c) output
3. 3.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
4. 4.Which of these is an output? (a) a beep sound (b) adding up a bill (c) speaking a command (d) taking a photo
5. 5.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
6. 6.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
7. 7.Which of these is an output? (a) speaking a command (b) working out a tip (c) typing your age (d) a pop-up message
8. 8.🔍 Which is the odd one out? (a) taking a photo (b) adding up a bill (c) working out a tip (d) sorting the scores
9. 9.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
10. 10.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
11. 11.True or false: a buzz (vibration) is processing. (a) False (b) True
12. 12.True or false: working out a tip is an output. (a) True (b) False
13. 13.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 2 (c) line 3 (d) line 1
15. 15.⚙️ What number does this app show?
    let bill = 195; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
16. 16.True or false: taking a photo is processing. (a) False (b) True
17. 17.True or false: a pop-up message is an input. (a) True (b) False
18. 18.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) input (c) processing
19. 19.Which of these is an input? (a) a beep sound (b) a result on screen (c) tapping a button (d) sorting the scores
20. 20.⚙️ 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);
21. 21.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
22. 22.True or false: a buzz (vibration) is an output. (a) False (b) True
23. 23.Which of these is an input? (a) adding up a bill (b) checking a password (c) a buzz (vibration) (d) typing your age
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 104; // 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 2 (b) line 1 (c) line 4 (d) line 3
25. 25.🔍 Which is the odd one out? (a) a beep sound (b) tapping a button (c) speaking a command (d) taking a photo
26. 26.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
27. 27.Which of these is processing? (a) typing your age (b) a result on screen (c) checking a password (d) a beep sound
28. 28.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) sorting the scores (d) a buzz (vibration)
29. 29.⚙️ What number does this app show?
    let bill = 155; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
30. 30.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) taking a photo (d) working out a tip
31. 31.True or false: speaking a command is an input. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) taking a photo (d) a result on screen
33. 33.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
34. 34.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
35. 35.⚙️ 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 4 (b) line 2 (c) line 3 (d) line 1
36. 36.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
37. 37.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
38. 38.⚙️ What number does this app show?
    let bill = 174; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
39. 39.True or false: taking a photo is an input. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) speaking a command (b) a beep sound (c) a buzz (vibration) (d) a result on screen

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