App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 434 · 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.Which of these is true of a tab bar? (a) undoes one move (b) opens a list of pages (c) shows 3 to 5 icons (d) goes to the last screen
2. 2.💾 What does this code show? (Positions start at 0.)
   let notes = ["Maths", "Art", "Sports"];
   show(notes[0]); (a) Art (b) Sports (c) Maths
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Send button: 52 px tall
   Next button: 56 px tall
   Help button: 36 px tall
4. 4.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
5. 5.Which of these fits saving in the cloud? (a) a draft you are typing (b) a shared to-do list (c) notes to read offline (d) the sound on/off setting
6. 6.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a final design (b) a wireframe
7. 7.Which of these is true of a final design? (a) has no real colours (b) looks like the real app (c) is a quick sketch (d) shows where things go
8. 8.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) helps everyone (b) makes it harder
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.True or false: the button colours is about UI (the look). (a) False (b) True
11. 11.Which colour pair is easy to read? (a) red on green (b) white on black (c) yellow on white (d) light grey on white
12. 12.🧭 Why should every screen show where you are? (a) to hide the menu (b) to look busy (c) to use more battery (d) so users do not get lost
13. 13.🔢 In a photo-post flow, which comes LAST? (a) open the camera screen (b) add a filter (c) write a caption (d) post the photo
14. 14.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Item → Pens
    Design B: Home → Address → Shop → Pay → Pens → Menu (a) Design B (b) Design A
15. 15.True or false: a tiny 20 px button is poor button design. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) the screen layout (b) whether users get lost (c) how many taps it takes (d) how easy sign-up is
17. 17.True or false: buttons almost touching is good button design. (a) False (b) True
18. 18.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Pay → Pens → Offers
    Design B: Home → Shop → Search
19. 19.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔢 In a quiz-app flow, which comes LAST? (a) tap “Start quiz” (b) read a question (c) see the final score (d) pick an answer
21. 21.True or false: a wireframe shows the real fonts. (a) False (b) True
22. 22.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Chat tab
    2. open “Match report”
    3. open “Score card”
    4. tap Back
    How many times must you tap Back to reach the main screen of this tab?
23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) how easy sign-up is (b) the screen layout (c) the font size (d) the theme colours
25. 25.🖼️ In this wireframe (top to bottom), what is right below the list of items?
    [ big picture ]
    [ Save button ]
    [ Add button ]
    [ search box ]
    [ list of items ]
    [ title text ] (a) search box (b) Add button (c) title text (d) big picture
26. 26.Which of these is about UI (the look)? (a) how users feel after (b) the button colours (c) how fast a task is done (d) how easy sign-up is
27. 27.♿ A screen has 11 icon buttons. Only 10 of them have a text label for screen readers. How many still need a label?
28. 28.True or false: whether users get lost is about UX (the experience). (a) False (b) True
29. 29.♿ Showing right or wrong only in red and green is a problem for ___. (a) the battery (b) fast typists (c) the server (d) colour-blind users
30. 30.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 25 px
    Title: 9 px
    Menu: 28 px (a) Title (b) Label (c) Menu
31. 31.🔢 In a food-order flow, which comes first: “pick a dish” or “open the menu”? (a) open the menu (b) pick a dish
32. 32.♿ Does this help everyone, or make the app harder to use: tiny tap areas? (a) makes it harder (b) helps everyone
33. 33.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Badges”
    2. tap Back
    3. open “Edit photo”
    4. tap Back
    5. open “Video”
    How many times must you tap Back to reach the main screen of this tab?
34. 34.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Friend list”
    2. tap Back
    3. open “Map”
    4. open “Friend list”
    5. tap the Search tab
    How many times must you tap Back to reach the main screen of this tab?
35. 35.🔢 In a sign-up flow, which comes FIRST? (a) make a password (b) open the app (c) type name and email (d) tap “Sign up”
36. 36.💾 What number does this code show?
    let points = 5;
    points = points - 2;
    points = points + 1;
    show(points);
37. 37.🖼️ In this wireframe (top to bottom), what is right below the Add button?
    [ top bar ]
    [ big picture ]
    [ title text ]
    [ Add button ]
    [ search box ] (a) top bar (b) title text (c) search box (d) big picture
38. 38.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Address → Offers → Confirm
    Design B: Home → Address → Search → Menu → Shop → Pay → Size
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 64 px tall
    Help button: 60 px tall
    Cancel button: 56 px tall

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