App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 399 · 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.💾 What does this code show? (Positions start at 0.)
   let friends = ["Aman", "Arjun", "Meera", "Riya", "Zoya"];
   show(friends[3]); (a) Arjun (b) Riya (c) Aman (d) Meera
2. 2.💾 What number does this code show?
   let notes = ["Music", "Science", "Art", "Maths"];
   notes.push("Hindi");
   notes.push("Sports");
   show(notes.length);
3. 3.🖼️ In this wireframe (top to bottom), what is right below the tab bar?
   [ tab bar ]
   [ top bar ]
   [ big picture ]
   [ title text ]
   [ list of items ] (a) list of items (b) title text (c) top bar (d) big picture
4. 4.True or false: a final design uses the final pictures. (a) False (b) True
5. 5.True or false: “sudden loud sounds” helps everyone use the app. (a) True (b) False
6. 6.True or false: a wireframe uses the final pictures. (a) True (b) False
7. 7.✏️ A box with a cross in a wireframe usually means ___. (a) an error (b) a closed app (c) a picture goes here (d) delete this
8. 8.🔍 Which is the odd one out? (a) captions on videos (b) text that can grow (c) labels on every icon (d) sudden loud sounds
9. 9.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Shop → Item → Menu → Pay → Results
   Design B: Home → Menu → Search
10. 10.🔍 Which is the odd one out? (a) how users feel after (b) the icon shapes (c) the theme colours (d) the button colours
11. 11.True or false: how fast a task is done is about UX (the experience). (a) False (b) True
12. 12.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Shop → Pens
    Design B: Home → Confirm → Results → Item → Size
13. 13.True or false: a wireframe has no real colours. (a) True (b) False
14. 14.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Menu → Address → Shop → Pens → Pay → Item
    Design B: Home → Item → Offers
15. 15.💾 Which can hold many values in order? (a) a single number (b) a switch (c) a button (d) a list
16. 16.🔢 In a photo-post flow, which comes first: “open the camera screen” or “take the photo”? (a) take the photo (b) open the camera screen
17. 17.💾 What number does this code show?
    let friends = ["Kabir", "Arjun", "Aman"];
    friends.push("Meera");
    show(friends.length);
18. 18.Which of these is true of a menu button? (a) opens a list of pages (b) undoes one move (c) sits at the bottom (d) goes to the last screen
19. 19.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Badges”
    2. open “Friend list”
    3. open “Badges”
    4. tap Back
    Which screen are you on now? (a) Friend list (b) Home (c) Search (d) Badges
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.Which of these helps everyone use the app? (a) colour as the only clue (b) sudden loud sounds (c) icons with no labels (d) strong colour contrast
22. 22.True or false: how many taps it takes is about UX (the experience). (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
24. 24.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) dead end (c) tab bar (d) home screen
25. 25.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Badges”
    2. tap the Me tab
    3. open “Map”
    Which screen are you on now? (a) Quiz (b) Badges (c) Map (d) Lessons
26. 26.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Friend list”
    2. tap the Home tab
    3. open “Badges”
    4. tap the Profile tab
    5. open “Friend list”
    How many times must you tap Back to reach the main screen of this tab?
27. 27.🔍 Which is the odd one out? (a) the font size (b) the button colours (c) the screen layout (d) how many taps it takes
28. 28.Which of these makes the app harder to use? (a) tiny tap areas (b) captions on videos (c) text that can grow (d) big touch targets
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 60 px tall
    Save button: 36 px tall
30. 30.♿ Why add captions to videos? (a) to hide the sound (b) to add colour (c) so anyone can follow (d) to slow them down
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔢 In a food-order flow, which comes first: “open the menu” or “check the cart”? (a) check the cart (b) open the menu
33. 33.🔍 Which is the odd one out? (a) whether users get lost (b) how many taps it takes (c) how easy sign-up is (d) the button colours
34. 34.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) on the phone (b) in the cloud
35. 35.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Results → Search → Size
    Design B: Home → Cart → Pay → Results → Confirm
36. 36.🔍 Which is the odd one out? (a) text that can grow (b) captions on videos (c) fast-flashing lights (d) labels on every icon
37. 37.💾 What does this code show? (Positions start at 0.)
    let songs = ["Monsoon", "Kites", "Ocean", "Rain", "Stars"];
    show(songs[1]); (a) Rain (b) Kites (c) Ocean (d) Monsoon
38. 38.Which of these is true of a final design? (a) uses the final pictures (b) uses plain grey boxes (c) is a quick sketch (d) has no real colours
39. 39.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. open “Edit photo”
    3. open “Badges”
    Which screen are you on now? (a) Edit photo (b) Quiz (c) Lessons (d) Badges
40. 40.Which of these is true of a tab bar? (a) undoes one move (b) shows 3 to 5 icons (c) goes to the last screen (d) opens a list of pages

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