App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 562 · 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.True or false: a pop-up message is an output. (a) True (b) False
2. 2.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
3. 3.True or false: a result on screen is processing. (a) False (b) True
4. 4.True or false: adding up a bill is an input. (a) True (b) False
5. 5.Which of these is processing? (a) working out a tip (b) a beep sound (c) tapping a button (d) a result on screen
6. 6.🔍 Which is the odd one out? (a) speaking a command (b) a pop-up message (c) taking a photo (d) tapping a button
7. 7.🔍 Which is the odd one out? (a) tapping a button (b) a beep sound (c) taking a photo (d) typing your age
8. 8.Which of these is processing? (a) speaking a command (b) typing your age (c) adding up a bill (d) tapping a button
9. 9.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) processing (c) output
10. 10.True or false: speaking a command is an input. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a beep sound (b) taking a photo (c) a result on screen (d) a buzz (vibration)
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 10; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 1 (c) line 3
13. 13.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
14. 14.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a pop-up message (d) adding up a bill
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 170; // 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 4 (b) line 1 (c) line 3 (d) line 2
16. 16.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) tapping a button (d) a buzz (vibration)
17. 17.True or false: tapping a button is an input. (a) True (b) False
18. 18.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
19. 19.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) processing (c) output
20. 20.⚙️ 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 4 (b) line 3 (c) line 2 (d) line 1
21. 21.⚙️ What number does this app show?
    let price = 580; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
22. 22.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 3 (b) line 4 (c) line 1 (d) line 2
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 96; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 1 (b) line 2 (c) line 4 (d) line 3
25. 25.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) processing (c) input
26. 26.⚙️ What number does this app show?
    let price = 330; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
27. 27.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) a buzz (vibration) (d) adding up a bill
28. 28.⚙️ What number does this app show?
    let price = 390; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
29. 29.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
30. 30.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
31. 31.⚙️ 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);
32. 32.Which of these is an input? (a) a buzz (vibration) (b) checking a password (c) typing your age (d) a beep sound
33. 33.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
34. 34.⚙️ What number does this app show?
    let bill = 104; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
35. 35.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
36. 36.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
37. 37.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) a result on screen (d) sorting the scores
38. 38.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
39. 39.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
40. 40.⚙️ 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);

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