App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 473 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 64 px tall
   Cancel button: 24 px tall
   Send button: 60 px tall
   Done button: 72 px tall (a) Next (b) Done (c) Send (d) Cancel
2. 2.🔢 In a food-order flow, which comes FIRST? (a) check the cart (b) pay for the order (c) track the order (d) open the menu
3. 3.🔢 In a sign-up flow, which comes first: “enter the code sent” or “make a password”? (a) enter the code sent (b) make a password
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
5. 5.True or false: a final design is a quick sketch. (a) False (b) True
6. 6.Which of these is about UI (the look)? (a) how easy sign-up is (b) how fast a task is done (c) how many taps it takes (d) the icon shapes
7. 7.💾 What number does this code show?
   let friends = ["Aman", "Kabir"];
   friends.push("Meera");
   show(friends.length);
8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) black on yellow
9. 9.Which of these is true of a tab bar? (a) opens a list of pages (b) switches main sections (c) goes to the last screen (d) hides extra links
10. 10.🔍 Which is the odd one out? (a) the screen layout (b) the font size (c) how fast a task is done (d) the button colours
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Cancel button: 64 px tall
    Send button: 64 px tall (a) Send (b) Cancel (c) Next
12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) colour as the only clue (b) tiny tap areas (c) strong colour contrast (d) sudden loud sounds
14. 14.♿ A screen has 11 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
15. 15.🧭 Which part of navigation goes to the last screen? (a) a tab bar (b) a menu button (c) the back button
16. 16.Which of these is true of the back button? (a) hides extra links (b) opens a list of pages (c) switches main sections (d) undoes one move
17. 17.Which of these is true of a wireframe? (a) looks like the real app (b) is a quick sketch (c) uses the final pictures (d) has the real colours
18. 18.🔢 In a photo-post flow, which comes first: “open the camera screen” or “write a caption”? (a) write a caption (b) open the camera screen
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
21. 21.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ Add button ]
    [ big picture ]
    [ menu icon ]
    [ list of items ]
    [ top bar ]
    [ search box ] (a) search box (b) top bar (c) big picture (d) menu icon
22. 22.💾 What number does this code show?
    let stars = 8;
    stars = stars - 6;
    stars = stars + 3;
    show(stars);
23. 23.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) makes it harder (b) helps everyone
24. 24.🖼️ In this wireframe (top to bottom), what is right above the top bar?
    [ Add button ]
    [ list of items ]
    [ top bar ]
    [ tab bar ]
    [ Save button ] (a) list of items (b) tab bar (c) Save button (d) Add button
25. 25.Which of these is about UX (the experience)? (a) the font size (b) how easy sign-up is (c) the button colours (d) the screen layout
26. 26.Which of these is true of a final design? (a) has the real colours (b) is a quick sketch (c) uses plain grey boxes (d) has no real colours
27. 27.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) in the cloud (b) on the phone
28. 28.💾 What does this code show? (Positions start at 0.)
    let notes = ["Music", "Sports", "Maths", "Hindi", "Art"];
    show(notes[4]); (a) Art (b) Maths (c) Sports (d) Music
29. 29.🧭 Which part of navigation sits at the bottom? (a) a menu button (b) a tab bar (c) the back button
30. 30.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a final design (b) a wireframe
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) red on green (d) yellow on white
33. 33.🧭 Which part of navigation hides extra links? (a) a tab bar (b) a menu button (c) the back button
34. 34.Which of these fits saving on the phone? (a) photos on two devices (b) a draft you are typing (c) a class leaderboard (d) a shared to-do list
35. 35.♿ What should every icon-only button have for screen readers? (a) a bright colour (b) a sound (c) a long animation (d) a text label
36. 36.💾 What number does this code show?
    let friends = ["Riya", "Kabir"];
    friends.push("Aman");
    show(friends.length);
37. 37.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Menu → Shop → Offers
    Design B: Home → Item → Confirm (a) Design A (b) Design B
38. 38.🔍 Which is the odd one out? (a) big touch targets (b) fast-flashing lights (c) strong colour contrast (d) text that can grow
39. 39.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ title text ]
    [ top bar ]
    [ list of items ]
    [ Save button ]
    [ search box ] (a) search box (b) Save button (c) top bar (d) list of items
40. 40.💾 Where should the app save the sound on/off setting: on the phone or in the cloud? (a) on the phone (b) in the cloud

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