App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 511 · 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 number does this code show?
   let coins = 3;
   coins = coins - 3;
   coins = coins + 5;
   show(coins);
2. 2.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
   1. open “Edit photo”
   2. tap the Me tab
   3. open “Help page”
   4. tap Back
   5. tap the Lessons tab
   Which screen are you on now? (a) Lessons (b) Quiz (c) Edit photo (d) Help page
3. 3.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Address → Cart
   Design B: Home → Size → Pay → Menu → Item
4. 4.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Send button: 64 px tall
   Save button: 44 px tall
   Next button: 60 px tall
7. 7.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) makes it harder (b) helps everyone
8. 8.🔢 In a food-order flow, what comes right after “pick a dish”? (a) add it to the cart (b) open the menu (c) track the order (d) pay for the order
9. 9.♿ Showing right or wrong only in red and green is a problem for ___. (a) fast typists (b) the server (c) the battery (d) colour-blind users
10. 10.💾 pop() takes off the last item. What does this code show?
    let friends = ["Aman", "Meera", "Zoya"];
    friends.pop();
    show(friends[friends.length - 1]); (a) Zoya (b) Aman (c) Meera
11. 11.Which of these is true of a wireframe? (a) uses the final pictures (b) shows the real fonts (c) has the real colours (d) shows where things go
12. 12.🖼️ In this wireframe (top to bottom), what is right below the filter buttons?
    [ Save button ]
    [ search box ]
    [ filter buttons ]
    [ Add button ]
    [ top bar ]
    [ tab bar ] (a) tab bar (b) top bar (c) Add button (d) Save button
13. 13.Which of these is about UX (the experience)? (a) the screen layout (b) the theme colours (c) how easy sign-up is (d) the icon shapes
14. 14.Which of these is true of a final design? (a) has the real colours (b) has no real colours (c) is a quick sketch (d) uses plain grey boxes
15. 15.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Video”
    2. tap Back
    3. open “Friend list”
    4. tap Back
    5. open “Map”
    Which screen are you on now? (a) Feed (b) Map (c) Friend list (d) Video
16. 16.Which of these helps everyone use the app? (a) fast-flashing lights (b) tiny tap areas (c) icons with no labels (d) captions on videos
17. 17.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Search → Address
    Design B: Home → Item → Shop → Address → Cart (a) Design B (b) Design A
18. 18.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Offers → Size → Item → Address → Pay → Menu
    Design B: Home → Pay → Search (a) Design B (b) Design A
19. 19.Which of these helps everyone use the app? (a) colour as the only clue (b) fast-flashing lights (c) icons with no labels (d) labels on every icon
20. 20.True or false: chat messages to friends fits saving on the phone. (a) False (b) True
21. 21.Which of these fits saving on the phone? (a) chat messages to friends (b) a shared to-do list (c) photos on two devices (d) notes to read offline
22. 22.🔢 In a sign-up flow, what comes right after “enter the code sent”? (a) make a password (b) open the app (c) tap “Sign up” (d) see the home screen
23. 23.♿ What does a screen reader do? (a) plays music (b) takes photos (c) reads the screen aloud (d) makes text tiny
24. 24.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a wireframe (b) a final design
25. 25.♿ Does this help everyone, or make the app harder to use: big touch targets? (a) makes it harder (b) helps everyone
26. 26.💾 What number does this code show?
    let songs = ["Monsoon", "Sunrise", "Stars"];
    songs.push("Kites");
    songs.push("Ocean");
    show(songs.length);
27. 27.Which of these is true of a wireframe? (a) looks like the real app (b) shows the real fonts (c) has the real colours (d) has no real colours
28. 28.True or false: the theme colours is about UX (the experience). (a) True (b) False
29. 29.Which of these is true of a tab bar? (a) opens a list of pages (b) undoes one move (c) hides extra links (d) shows 3 to 5 icons
30. 30.♿ Why add captions to videos? (a) to add colour (b) to hide the sound (c) to slow them down (d) so anyone can follow
31. 31.🔢 In a food-order flow, which comes first: “pick a dish” or “add it to the cart”? (a) pick a dish (b) add it to the cart
32. 32.🧭 Tapping a tab usually takes you to ___. (a) the last app used (b) that tab’s main screen (c) the phone settings (d) a random page
33. 33.🎨 Is this about UI or UX: whether users get lost? (a) UI (b) UX
34. 34.🧭 What does the back button usually do? (a) opens settings (b) deletes the page (c) closes all apps (d) goes to the last screen
35. 35.💾 What number does this code show?
    let friends = ["Meera", "Aman", "Riya", "Arjun"];
    friends.push("Zoya");
    show(friends.length);
36. 36.🧭 Which part of navigation undoes one move? (a) a tab bar (b) a menu button (c) the back button
37. 37.💾 pop() takes off the last item. What does this code show?
    let songs = ["Rain", "Sunrise", "Kites", "Stars", "Monsoon"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Rain (b) Sunrise (c) Kites (d) Stars
38. 38.🎨 UI stands for user ___. (a) idea (b) interface (c) internet (d) input
39. 39.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🎨 Is this about UI or UX: how many taps it takes? (a) UI (b) UX

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