App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 157 · 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 coins = 3;
   coins = coins - 2;
   coins = coins + 1;
   show(coins);
2. 2.🔍 Which is the odd one out? (a) the font size (b) how many taps it takes (c) the icon shapes (d) the button colours
3. 3.💾 What number does this code show?
   let songs = ["Ocean", "Rain", "Monsoon"];
   songs.push("Kites");
   show(songs.length);
4. 4.✏️ Is this true of a wireframe or of a final design: has no real colours? (a) a wireframe (b) a final design
5. 5.♿ What should every icon-only button have for screen readers? (a) a text label (b) a long animation (c) a bright colour (d) a sound
6. 6.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Results → Search → Shop
   Design B: Home → Pay → Item → Address → Cart → Search → Size
7. 7.💾 What number does this code show?
   let score = 3;
   score = score - 1;
   score = score + 5;
   show(score);
8. 8.🎨 Who should you test the UX with? (a) nobody (b) only yourself (c) real users (d) the app icon
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 44 px tall
   Back button: 36 px tall
   Save button: 56 px tall
   Done button: 44 px tall
10. 10.True or false: a wireframe uses plain grey boxes. (a) True (b) False
11. 11.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 28 px
    Hint: 24 px
    Body text: 25 px
    Menu: 24 px
    Footer: 12 px (a) Label (b) Body text (c) Hint (d) Footer
12. 12.🔢 In a sign-up flow, which comes first: “tap “Sign up”” or “see the home screen”? (a) see the home screen (b) tap “Sign up”
13. 13.True or false: the icon shapes is about UI (the look). (a) False (b) True
14. 14.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) dead end (c) home screen (d) tab bar
15. 15.True or false: “big touch targets” makes the app harder to use. (a) True (b) False
16. 16.🖼️ In this wireframe (top to bottom), what is right below the list of items?
    [ tab bar ]
    [ menu icon ]
    [ top bar ]
    [ list of items ]
    [ Save button ] (a) menu icon (b) Save button (c) top bar (d) tab bar
17. 17.True or false: notes to read offline fits saving on the phone. (a) False (b) True
18. 18.💾 What is a variable? (a) a picture (b) a named box for a value (c) a phone setting (d) a type of screen
19. 19.True or false: the button colours is about UI (the look). (a) True (b) False
20. 20.🧭 Which part of navigation opens a list of pages? (a) the back button (b) a tab bar (c) a menu button
21. 21.🔢 In a quiz-app flow, which comes first: “tap “Start quiz”” or “read a question”? (a) read a question (b) tap “Start quiz”
22. 22.💾 What number does this code show?
    let friends = ["Riya", "Arjun", "Kabir", "Aman"];
    friends.push("Zoya");
    show(friends.length);
23. 23.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Address → Search → Pay → Menu → Shop → Offers
    Design B: Home → Cart → Search → Size → Confirm
24. 24.Which of these is true of a wireframe? (a) uses the final pictures (b) has no real colours (c) has the real colours (d) looks like the real app
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Search tab
    2. open “Badges”
    3. tap the Profile tab
    4. open “Edit photo”
    Which screen are you on now? (a) Search (b) Home (c) Badges (d) Edit photo
26. 26.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on dark green (d) dark blue on white
27. 27.🔢 In a sign-up flow, which comes first: “make a password” or “enter the code sent”? (a) enter the code sent (b) make a password
28. 28.Which of these is about UI (the look)? (a) how fast a task is done (b) how easy sign-up is (c) how users feel after (d) the font size
29. 29.🔢 In a food-order flow, what comes right after “pick a dish”? (a) open the menu (b) track the order (c) pay for the order (d) add it to the cart
30. 30.✏️ Why draw a wireframe before coding? (a) it adds colours (b) it runs the app (c) changes are quick (d) it saves data
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
32. 32.🔍 Which is the odd one out? (a) fast-flashing lights (b) icons with no labels (c) colour as the only clue (d) big touch targets
33. 33.Which of these is true of a final design? (a) shows where things go (b) is a quick sketch (c) uses the final pictures (d) uses plain grey boxes
34. 34.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) light grey on white (d) white on dark green
35. 35.💾 What number does this code show?
    let coins = 8;
    coins = coins - 4;
    coins = coins + 4;
    show(coins);
36. 36.🔢 In a food-order flow, what comes right after “open the menu”? (a) add it to the cart (b) pick a dish (c) check the cart (d) pay for the order
37. 37.💾 In most code, the first item of a list is at position ___. (a) 1 (b) 2 (c) 10 (d) 0
38. 38.♿ A screen has 5 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
39. 39.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Confirm → Offers → Cart → Pay → Address
    Design B: Home → Item → Shop → Pens → Size → Cart → Menu (a) Design B (b) Design A
40. 40.🔢 In a sign-up flow, what comes right after “make a password”? (a) tap “Sign up” (b) enter the code sent (c) see the home screen (d) open the app

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