App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 62 · 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.💾 pop() takes off the last item. What does this code show?
   let songs = ["Stars", "Rain", "Kites"];
   songs.pop();
   show(songs[songs.length - 1]); (a) Rain (b) Stars (c) Kites
2. 2.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Menu → Item → Cart → Pay → Search → Size
   Design B: Home → Shop → Pay → Confirm → Cart → Menu
3. 3.💾 What does this code show? (Positions start at 0.)
   let notes = ["Art", "Sports", "Music"];
   show(notes[0]); (a) Sports (b) Music (c) Art
4. 4.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Match report”
   2. tap Back
   3. tap the Home tab
   4. tap the Home tab
   5. open “Score card”
   How many times must you tap Back to reach the main screen of this tab?
5. 5.🔢 In a food-order flow, which comes first: “pay for the order” or “pick a dish”? (a) pick a dish (b) pay for the order
6. 6.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
   [ title text ]
   [ filter buttons ]
   [ tab bar ]
   [ menu icon ] (a) menu icon (b) filter buttons (c) title text (d) tab bar
7. 7.Which of these is about UI (the look)? (a) whether users get lost (b) the screen layout (c) how users feel after (d) how fast a task is done
8. 8.🔢 In a food-order flow, which comes FIRST? (a) track the order (b) pick a dish (c) pay for the order (d) open the menu
9. 9.Which of these is about UX (the experience)? (a) how many taps it takes (b) the screen layout (c) the theme colours (d) the font size
10. 10.True or false: strong colour contrast is poor button design. (a) True (b) False
11. 11.Which of these is true of a menu button? (a) opens a list of pages (b) shows 3 to 5 icons (c) sits at the bottom (d) goes to the last screen
12. 12.🖼️ How many parts (boxes) does this wireframe have?
    [ top bar ]
    [ big picture ]
    [ menu icon ]
    [ search box ]
    [ filter buttons ]
    [ list of items ]
13. 13.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.♿ A screen has 12 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?
15. 15.💾 What number does this code show?
    let songs = ["Sunrise", "Kites", "Monsoon"];
    songs.push("Stars");
    songs.push("Ocean");
    show(songs.length);
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
18. 18.Which of these is true of a wireframe? (a) uses plain grey boxes (b) has the real colours (c) looks like the real app (d) shows the real fonts
19. 19.Which of these fits saving on the phone? (a) photos on two devices (b) a shared to-do list (c) the sound on/off setting (d) a class leaderboard
20. 20.✏️ Why draw a wireframe before coding? (a) it adds colours (b) changes are quick (c) it saves data (d) it runs the app
21. 21.True or false: “big touch targets” makes the app harder to use. (a) False (b) True
22. 22.🔢 In a quiz-app flow, what comes right after “tap “Start quiz””? (a) see if it is right (b) read a question (c) see the final score (d) pick an answer
23. 23.Which of these is true of a wireframe? (a) has the real colours (b) looks like the real app (c) is a quick sketch (d) uses the final pictures
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
25. 25.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Caption: 11 px
    Hint: 20 px
    Footer: 24 px (a) Caption (b) Footer (c) Hint
26. 26.Which of these is about UI (the look)? (a) whether users get lost (b) how users feel after (c) how fast a task is done (d) the icon shapes
27. 27.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Me tab
    2. tap the Lessons tab
    3. open “Match report”
    How many times must you tap Back to reach the main screen of this tab?
28. 28.Which of these is true of a tab bar? (a) goes to the last screen (b) hides extra links (c) sits at the bottom (d) undoes one move
29. 29.🔢 In a photo-post flow, which comes FIRST? (a) take the photo (b) write a caption (c) open the camera screen (d) add a filter
30. 30.♿ A screen has 8 icon buttons. Only 3 of them have a text label for screen readers. How many still need a label?
31. 31.True or false: your last game level fits saving in the cloud. (a) True (b) False
32. 32.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Map”
    2. tap the Chat tab
    3. tap the Chat tab
    4. tap the Settings tab
    Which screen are you on now? (a) Feed (b) Map (c) Chat (d) Settings
33. 33.Which of these makes the app harder to use? (a) big touch targets (b) strong colour contrast (c) labels on every icon (d) fast-flashing lights
34. 34.🧭 Where is a tab bar usually placed in a phone app? (a) in the middle (b) nowhere (c) inside a button (d) at the bottom
35. 35.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Address → Offers → Search
    Design B: Home → Search → Offers
36. 36.✏️ Is this true of a wireframe or of a final design: has no real colours? (a) a final design (b) a wireframe
37. 37.🎨 UI stands for user ___. (a) interface (b) idea (c) internet (d) input
38. 38.💾 In most code, the first item of a list is at position ___. (a) 1 (b) 2 (c) 10 (d) 0
39. 39.🧭 Which part of navigation opens a list of pages? (a) the back button (b) a menu button (c) a tab bar
40. 40.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Pens → Item → Address
    Design B: Home → Address → Shop → Menu (a) Design A (b) Design B

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