App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 172 · 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 score = 9;
   score = score - 5;
   score = score + 1;
   show(score);
2. 2.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
   Design A: Home → Item → Pay → Pens → Menu → Address
   Design B: Home → Menu → Shop → Size → Pay → Results → Cart (a) Design B (b) Design A
3. 3.True or false: a final design has no real colours. (a) True (b) False
4. 4.Which of these is about UX (the experience)? (a) how easy sign-up is (b) the button colours (c) the font size (d) the icon shapes
5. 5.🔍 Which is the odd one out? (a) how many taps it takes (b) how easy sign-up is (c) the font size (d) how fast a task is done
6. 6.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
7. 7.Which of these is true of a wireframe? (a) uses the final pictures (b) has no real colours (c) has the real colours (d) shows the real fonts
8. 8.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
   [ Save button ]
   [ top bar ]
   [ title text ]
   [ list of items ] (a) top bar (b) title text (c) list of items (d) Save button
9. 9.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
   [ top bar ]
   [ tab bar ]
   [ filter buttons ]
   [ Add button ]
   [ menu icon ] (a) filter buttons (b) menu icon (c) Add button (d) tab bar
10. 10.Which of these is true of a tab bar? (a) goes to the last screen (b) opens a list of pages (c) shows 3 to 5 icons (d) undoes one move
11. 11.♿ Accessibility means an app works for ___. (a) only experts (b) nobody (c) only the coder (d) everyone
12. 12.♿ 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
13. 13.Which of these fits saving on the phone? (a) photos on two devices (b) your last game level (c) chat messages to friends (d) a class leaderboard
14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
15. 15.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Search → Menu → Shop → Pens
    Design B: Home → Size → Confirm
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
17. 17.Which of these helps everyone use the app? (a) tiny tap areas (b) colour as the only clue (c) captions on videos (d) icons with no labels
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Send button: 56 px tall
    Save button: 44 px tall
19. 19.💾 pop() takes off the last item. What does this code show?
    let notes = ["Music", "Science", "Art", "Hindi"];
    notes.pop();
    show(notes[notes.length - 1]); (a) Science (b) Music (c) Hindi (d) Art
20. 20.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on yellow (d) black on pale grey
21. 21.🔢 In a food-order flow, which comes first: “track the order” or “check the cart”? (a) track the order (b) check the cart
22. 22.True or false: your last game level fits saving on the phone. (a) True (b) False
23. 23.True or false: your last game level fits saving in the cloud. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
25. 25.🔢 In a quiz-app flow, which comes first: “pick an answer” or “tap “Start quiz””? (a) pick an answer (b) tap “Start quiz”
26. 26.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ filter buttons ]
    [ title text ]
    [ menu icon ]
    [ top bar ]
    [ tab bar ]
    [ search box ] (a) filter buttons (b) tab bar (c) search box (d) title text
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
28. 28.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Footer: 23 px
    Title: 17 px
    Hint: 13 px
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Start button: 48 px tall
    Done button: 56 px tall
    Back button: 24 px tall (a) Start (b) Back (c) Cancel (d) Done
30. 30.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) helps everyone (b) makes it harder
31. 31.🖼️ In this wireframe (top to bottom), what is right below the menu icon?
    [ menu icon ]
    [ big picture ]
    [ Save button ]
    [ title text ] (a) big picture (b) Save button (c) title text
32. 32.🔍 Which is the odd one out? (a) how many taps it takes (b) the icon shapes (c) how users feel after (d) how easy sign-up is
33. 33.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ list of items ]
    [ search box ]
    [ top bar ]
    [ Add button ] (a) Add button (b) list of items (c) top bar
34. 34.True or false: the icon shapes is about UI (the look). (a) False (b) True
35. 35.True or false: “sudden loud sounds” helps everyone use the app. (a) False (b) True
36. 36.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a wireframe (b) a final design
37. 37.True or false: chat messages to friends fits saving on the phone. (a) False (b) True
38. 38.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) black on pale grey (d) white on dark green
39. 39.✏️ Why draw a wireframe before coding? (a) it adds colours (b) it saves data (c) it runs the app (d) changes are quick
40. 40.🔢 In a food-order flow, which comes FIRST? (a) check the cart (b) open the menu (c) add it to the cart (d) pay for the order

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