App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 637 · 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) taking a photo (b) tapping a button (c) typing your age (d) a result on screen
2. 2.Which of these is an input? (a) sorting the scores (b) a beep sound (c) taking a photo (d) working out a tip
3. 3.⚙️ What number does this app show?
   let km = 4; // typed by the user
   let metres = km * 1000;
   show(metres);
4. 4.True or false: taking a photo is an input. (a) False (b) True
5. 5.True or false: tapping a button is an output. (a) False (b) True
6. 6.Which of these is an output? (a) a beep sound (b) tapping a button (c) typing your age (d) taking a photo
7. 7.True or false: checking a password is an input. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) a pop-up message (d) speaking a command
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let bill = 82; // 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 2 (b) line 4 (c) line 3 (d) line 1
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 70; // 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
11. 11.Which of these is an input? (a) a pop-up message (b) typing your age (c) checking a password (d) working out a tip
12. 12.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) processing (c) input
13. 13.Which of these is processing? (a) taking a photo (b) typing your age (c) speaking a command (d) adding up a bill
14. 14.⚙️ 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);
15. 15.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) processing (c) output
16. 16.🔍 Which is the odd one out? (a) a pop-up message (b) a buzz (vibration) (c) a beep sound (d) sorting the scores
17. 17.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
18. 18.True or false: speaking a command is an input. (a) False (b) True
19. 19.⚙️ What number does this app show?
    let bill = 300; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
20. 20.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a buzz (vibration) (d) typing your age
21. 21.Which of these is an output? (a) a result on screen (b) speaking a command (c) typing your age (d) tapping a button
22. 22.🔍 Which is the odd one out? (a) checking a password (b) working out a tip (c) adding up a bill (d) a beep sound
23. 23.True or false: typing your age is an input. (a) True (b) False
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 81; // 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 2 (b) line 4 (c) line 1 (d) line 3
25. 25.⚙️ What number does this app show?
    let bill = 276; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
26. 26.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
27. 27.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) processing (c) output
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 600; // typed by the user
    line 2: let off = 30; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 1 (b) line 4 (c) line 2 (d) line 3
29. 29.⚙️ 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 3 (b) line 4 (c) line 1 (d) line 2
30. 30.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) processing (c) input
31. 31.🔍 Which is the odd one out? (a) a result on screen (b) working out a tip (c) a beep sound (d) a buzz (vibration)
32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 180; // 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 1 (b) line 3 (c) line 4 (d) line 2
33. 33.⚙️ What number does this app show?
    let bill = 84; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
34. 34.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
35. 35.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) processing (c) input
36. 36.Which of these is an output? (a) checking a password (b) a pop-up message (c) adding up a bill (d) speaking a command
37. 37.Which of these is an input? (a) a beep sound (b) tapping a button (c) adding up a bill (d) checking a password
38. 38.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 5; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 60; // 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 2 (b) line 4 (c) line 3 (d) line 1

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