App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 690 · 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 friends = ["Zoya", "Aman", "Riya"];
   friends.push("Meera");
   show(friends.length);
2. 2.🖼️ How many parts (boxes) does this wireframe have?
   [ Save button ]
   [ Add button ]
   [ tab bar ]
   [ list of items ]
3. 3.🔍 Which is the odd one out? (a) the theme colours (b) how easy sign-up is (c) the button colours (d) the icon shapes
4. 4.🖼️ In this wireframe (top to bottom), what is right above the filter buttons?
   [ big picture ]
   [ search box ]
   [ filter buttons ]
   [ tab bar ]
   [ title text ]
   [ list of items ] (a) list of items (b) tab bar (c) big picture (d) search box
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 36 px tall
   Save button: 32 px tall
   Cancel button: 36 px tall
6. 6.True or false: “big touch targets” makes the app harder to use. (a) True (b) False
7. 7.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
   1. open “Video”
   2. tap the Lessons tab
   3. open “Friend list”
   4. tap the Quiz tab
   5. open “Score card”
   How many times must you tap Back to reach the main screen of this tab?
8. 8.🔢 In a sign-up flow, what comes right after “enter the code sent”? (a) make a password (b) tap “Sign up” (c) open the app (d) see the home screen
9. 9.🔢 In a sign-up flow, what comes right after “open the app”? (a) make a password (b) enter the code sent (c) tap “Sign up” (d) see the home screen
10. 10.🔢 In a sign-up flow, which comes LAST? (a) open the app (b) make a password (c) tap “Sign up” (d) see the home screen
11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
13. 13.True or false: the icon shapes is about UX (the experience). (a) True (b) False
14. 14.True or false: how many taps it takes is about UI (the look). (a) False (b) True
15. 15.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Help page”
    2. open “Help page”
    3. tap Back
    Which screen are you on now? (a) Feed (b) Settings (c) Help page (d) Chat
16. 16.True or false: your last game level fits saving on the phone. (a) True (b) False
17. 17.🧭 Why should every screen show where you are? (a) to use more battery (b) to look busy (c) to hide the menu (d) so users do not get lost
18. 18.♿ 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
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 64 px tall
    Send button: 40 px tall
20. 20.🔀 What is a user flow? (a) a type of font (b) the path through screens (c) a colour theme (d) a charging cable
21. 21.💾 Which works with no internet at all? (a) a shared chat (b) a cloud backup (c) a cloud leaderboard (d) data saved on the phone
22. 22.True or false: chat messages to friends fits saving on the phone. (a) True (b) False
23. 23.🧭 Tapping a tab usually takes you to ___. (a) the phone settings (b) the last app used (c) a random page (d) that tab’s main screen
24. 24.Which of these fits saving on the phone? (a) photos on two devices (b) a shared to-do list (c) a draft you are typing (d) chat messages to friends
25. 25.True or false: “tiny tap areas” makes the app harder to use. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) strong colour contrast (b) colour as the only clue (c) labels on every icon (d) captions on videos
27. 27.🔢 In a photo-post flow, what comes right after “write a caption”? (a) take the photo (b) open the camera screen (c) add a filter (d) post the photo
28. 28.🔢 In a food-order flow, which comes FIRST? (a) pick a dish (b) track the order (c) open the menu (d) add it to the cart
29. 29.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. open “Help page”
    3. open “Video”
    How many times must you tap Back to reach the main screen of this tab?
30. 30.Which of these is true of a final design? (a) shows where things go (b) has no real colours (c) looks like the real app (d) is a quick sketch
31. 31.♿ Accessibility means an app works for ___. (a) only the coder (b) only experts (c) nobody (d) everyone
32. 32.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) red on green (d) light grey on white
33. 33.Which of these fits saving on the phone? (a) a class leaderboard (b) chat messages to friends (c) photos on two devices (d) notes to read offline
34. 34.Which colour pair is easy to read? (a) white on black (b) red on green (c) light grey on white (d) pale pink on white
35. 35.💾 pop() takes off the last item. What does this code show?
    let notes = ["Hindi", "Maths", "Sports", "Science"];
    notes.pop();
    show(notes[notes.length - 1]); (a) Maths (b) Sports (c) Hindi (d) Science
36. 36.💾 What does this code show? (Positions start at 0.)
    let notes = ["Maths", "Science", "Music", "Art", "Sports"];
    show(notes[1]); (a) Maths (b) Music (c) Art (d) Science
37. 37.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Confirm → Pay → Search → Pens → Results → Menu
    Design B: Home → Cart → Offers → Menu
38. 38.✏️ A box with a cross in a wireframe usually means ___. (a) an error (b) a closed app (c) a picture goes here (d) delete this
39. 39.💾 Saving data in the cloud lets you ___. (a) shrink the app (b) use it on any device (c) never need a password (d) skip the internet
40. 40.True or false: how easy sign-up is is about UI (the look). (a) False (b) True

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