App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 128 · 40 questions

Developer's tip (Think like the user): First decide which topic the question is about. Use that lesson’s rule: 48 px buttons, 16 px text, the screen stack, the flow order. For code, count positions from 0.

1. 1.🖼️ How many parts (boxes) does this wireframe have?
   [ menu icon ]
   [ filter buttons ]
   [ list of items ]
   [ search box ]
   [ title text ]
   [ Save button ]
2. 2.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
   Menu: 22 px
   Label: 27 px
   Title: 14 px
   Footer: 22 px (a) Footer (b) Label (c) Title (d) Menu
3. 3.🔍 Which is the odd one out? (a) icons with no labels (b) captions on videos (c) colour as the only clue (d) tiny tap areas
4. 4.Which of these helps everyone use the app? (a) sudden loud sounds (b) colour as the only clue (c) icons with no labels (d) captions on videos
5. 5.💾 Data saved only on the phone is lost when ___. (a) the phone is lost (b) you send a message (c) the screen turns off (d) the app is closed
6. 6.Which of these is true of a final design? (a) has no real colours (b) uses plain grey boxes (c) shows where things go (d) has the real colours
7. 7.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
   Caption: 9 px
   Title: 28 px
   Footer: 24 px
   Hint: 25 px
   Body text: 22 px (a) Caption (b) Footer (c) Title (d) Hint
8. 8.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
   Design A: Home → Address → Shop
   Design B: Home → Shop → Cart → Menu → Size
9. 9.True or false: a clear word like Save is good button design. (a) False (b) True
10. 10.💾 What number does this code show?
    let lives = 3;
    lives = lives - 2;
    lives = lives + 2;
    show(lives);
11. 11.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Map”
    2. tap the Profile tab
    3. tap the Profile tab
    4. tap the Profile tab
    Which screen are you on now? (a) Profile (b) Home (c) Search (d) Map
12. 12.💾 What number does this code show?
    let points = 8;
    points = points - 1;
    points = points + 1;
    show(points);
13. 13.True or false: a wireframe looks like the real app. (a) True (b) False
14. 14.🧭 About how many tabs suit a tab bar best? (a) 10 to 12 (b) 3 to 5 (c) 20 (d) 1
15. 15.🔢 In a photo-post flow, which comes first: “add a filter” or “open the camera screen”? (a) add a filter (b) open the camera screen
16. 16.♿ A screen has 9 icon buttons. Only 8 of them have a text label for screen readers. How many still need a label?
17. 17.💾 pop() takes off the last item. What does this code show?
    let friends = ["Riya", "Kabir", "Zoya"];
    friends.pop();
    show(friends[friends.length - 1]); (a) Kabir (b) Zoya (c) Riya
18. 18.💾 Which can hold many values in order? (a) a switch (b) a button (c) a single number (d) a list
19. 19.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) on the phone (b) in the cloud
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
21. 21.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Shop → Pay
    Design B: Home → Pens → Menu (a) Design A (b) Design B
22. 22.✏️ A box with a cross in a wireframe usually means ___. (a) a picture goes here (b) delete this (c) an error (d) a closed app
23. 23.🔀 Why plan the user flow before building? (a) to hide the buttons (b) so each step is clear (c) to skip testing (d) to add more taps
24. 24.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
25. 25.True or false: a final design has no real colours. (a) True (b) False
26. 26.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) helps everyone (b) makes it harder
27. 27.True or false: grey text on grey is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
29. 29.💾 What does this code show? (Positions start at 0.)
    let songs = ["Rain", "Sunrise", "Kites", "Ocean"];
    show(songs[1]); (a) Ocean (b) Rain (c) Sunrise (d) Kites
30. 30.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Edit photo”
    2. tap Back
    3. tap the Settings tab
    4. open “Badges”
    5. tap the Settings tab
    How many times must you tap Back to reach the main screen of this tab?
31. 31.🔢 In a photo-post flow, which comes first: “take the photo” or “open the camera screen”? (a) open the camera screen (b) take the photo
32. 32.💾 What number does this code show?
    let friends = ["Riya", "Arjun", "Zoya", "Aman"];
    friends.push("Meera");
    show(friends.length);
33. 33.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
35. 35.🔍 Which is the odd one out? (a) the font size (b) how users feel after (c) how easy sign-up is (d) how many taps it takes
36. 36.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. tap the Lessons tab
    3. open “Video”
    Which screen are you on now? (a) Lessons (b) Me (c) Video (d) Quiz
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Back button: 52 px tall
    Done button: 72 px tall
    Help button: 28 px tall (a) Cancel (b) Back (c) Help (d) Done
38. 38.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Cart → Pens → Shop
    Design B: Home → Menu → Shop → Search → Confirm → Address
39. 39.Which of these is true of a wireframe? (a) shows where things go (b) has the real colours (c) looks like the real app (d) uses the final pictures
40. 40.💾 Which works with no internet at all? (a) a cloud backup (b) data saved on the phone (c) a shared chat (d) a cloud leaderboard

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students