App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 147 · 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.True or false: photos on two devices fits saving in the cloud. (a) False (b) True
2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
3. 3.♿ A screen has 9 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?
4. 4.💾 What number does this code show?
   let notes = ["Hindi", "Maths"];
   notes.push("Art");
   notes.push("Music");
   show(notes.length);
5. 5.♿ Does this help everyone, or make the app harder to use: colour as the only clue? (a) makes it harder (b) helps everyone
6. 6.🔢 In a quiz-app flow, what comes right after “read a question”? (a) tap “Start quiz” (b) see if it is right (c) pick an answer (d) see the final score
7. 7.🔢 In a quiz-app flow, which comes first: “see the final score” or “tap “Start quiz””? (a) see the final score (b) tap “Start quiz”
8. 8.Which of these fits saving in the cloud? (a) a draft you are typing (b) a shared to-do list (c) the sound on/off setting (d) notes to read offline
9. 9.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on black (d) red on green
10. 10.💾 pop() takes off the last item. What does this code show?
    let friends = ["Riya", "Zoya", "Arjun", "Aman"];
    friends.pop();
    show(friends[friends.length - 1]); (a) Zoya (b) Aman (c) Arjun (d) Riya
11. 11.True or false: a final design has the real colours. (a) False (b) True
12. 12.💾 pop() takes off the last item. What does this code show?
    let songs = ["Stars", "Monsoon", "Ocean", "Kites"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Stars (b) Ocean (c) Monsoon (d) Kites
13. 13.✏️ Is this true of a wireframe or of a final design: uses the final pictures? (a) a wireframe (b) a final design
14. 14.🧭 Which part of navigation goes to the last screen? (a) a menu button (b) a tab bar (c) the back button
15. 15.🔍 Which is the odd one out? (a) icons with no labels (b) sudden loud sounds (c) colour as the only clue (d) text that can grow
16. 16.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 26 px
    Menu: 28 px
    Body text: 11 px (a) Footer (b) Body text (c) Menu
17. 17.♿ Why add captions to videos? (a) to hide the sound (b) to slow them down (c) so anyone can follow (d) to add colour
18. 18.True or false: “tiny tap areas” makes the app harder to use. (a) True (b) False
19. 19.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. open “Video”
    3. tap the Quiz tab
    How many times must you tap Back to reach the main screen of this tab?
20. 20.🔍 Which is the odd one out? (a) sudden loud sounds (b) icons with no labels (c) strong colour contrast (d) tiny tap areas
21. 21.Which of these makes the app harder to use? (a) strong colour contrast (b) labels on every icon (c) text that can grow (d) colour as the only clue
22. 22.🔢 In a sign-up flow, which comes first: “tap “Sign up”” or “type name and email”? (a) type name and email (b) tap “Sign up”
23. 23.🧭 Where is a tab bar usually placed in a phone app? (a) inside a button (b) in the middle (c) nowhere (d) at the bottom
24. 24.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Size → Cart → Address → Confirm → Pens → Menu
    Design B: Home → Cart → Menu → Shop → Address
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Map”
    2. open “Video”
    3. open “Help page”
    How many times must you tap Back to reach the main screen of this tab?
26. 26.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 24 px
    Title: 19 px
    Hint: 27 px
    Body text: 12 px (a) Hint (b) Body text (c) Title (d) Label
27. 27.True or false: how easy sign-up is is about UX (the experience). (a) True (b) False
28. 28.True or false: the button colours is about UI (the look). (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) the button colours (b) the font size (c) how easy sign-up is (d) the screen layout
30. 30.True or false: the sound on/off setting fits saving in the cloud. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Start button: 56 px tall
    Done button: 36 px tall
    Back button: 56 px tall
32. 32.🔢 In a photo-post flow, what comes right after “open the camera screen”? (a) write a caption (b) post the photo (c) take the photo (d) add a filter
33. 33.♿ What should every icon-only button have for screen readers? (a) a long animation (b) a sound (c) a text label (d) a bright colour
34. 34.✏️ Is this true of a wireframe or of a final design: has no real colours? (a) a final design (b) a wireframe
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
36. 36.Which of these makes the app harder to use? (a) labels on every icon (b) fast-flashing lights (c) strong colour contrast (d) captions on videos
37. 37.💾 What does this code show? (Positions start at 0.)
    let notes = ["Music", "Art", "Maths", "Science"];
    show(notes[0]); (a) Maths (b) Music (c) Science (d) Art
38. 38.🎨 UI stands for user ___. (a) interface (b) internet (c) idea (d) input
39. 39.True or false: a class leaderboard fits saving on the phone. (a) True (b) False
40. 40.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Friend list”
    2. tap Back
    3. open “Video”
    4. tap Back
    Which screen are you on now? (a) Friend list (b) Feed (c) Video (d) Chat

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