App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 455 · 40 questions

Developer's tip (Plan, design, build, check): Find the topic: what apps are, designing apps, or logic and building. Read every screen, list or code line carefully, top to bottom. For code, write each value down step by step and check it again.

1. 1.🎨 UI stands for user ___. (a) interface (b) internet (c) idea (d) input
2. 2.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 150; // typed by the user
   line 2: let off = 10; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 1 (b) line 2 (c) line 3 (d) line 4
3. 3.🧩 How many buttons does this app screen have?
   [title] Settings
   [text box] Due date
   [button] Help
   [button] Done
   [button] Send
   [text box] Email
4. 4.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. tap the Home tab
   2. tap the Search tab
   3. open “Edit photo”
   4. tap Back
   5. open “Match report”
   Which screen are you on now? (a) Home (b) Search (c) Edit photo (d) Match report
5. 5.🔢 In a photo-post flow, which comes first: “add a filter” or “take the photo”? (a) take the photo (b) add a filter
6. 6.🧭 Which part of navigation undoes one move? (a) the back button (b) a tab bar (c) a menu button
7. 7.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a final design (b) a wireframe
8. 8.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
   Body text: 17 px
   Label: 12 px
   Caption: 20 px
   Title: 22 px
   Menu: 17 px
9. 9.♿ Showing right or wrong only in red and green is a problem for ___. (a) colour-blind users (b) fast typists (c) the server (d) the battery
10. 10.🔁 What number does this code show?
    let runs = [15, 16, 6];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
11. 11.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
12. 12.🔍 Which is the odd one out? (a) strong colour contrast (b) labels on every icon (c) tiny tap areas (d) big touch targets
13. 13.🖼️ How many parts (boxes) does this wireframe have?
    [ Add button ]
    [ filter buttons ]
    [ big picture ]
    [ menu icon ]
    [ Save button ]
14. 14.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money spent (b) show the balance (c) add money received (d) savings stickers
15. 15.Which of these app ideas solves no real problem? (a) a medicine reminder (b) a library due-date alert (c) a lost-and-found board (d) a blank grey screen
16. 16.🧪 What is the actual result of a test? (a) what we hope for (b) the test’s number (c) what the app really does (d) the app’s name
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 28 px tall
    Save button: 72 px tall
    Next button: 60 px tall (a) Help (b) Save (c) Send (d) Next
18. 18.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) show the balance (b) add money spent (c) add money received (d) pie-chart colours
19. 19.🔀 What number does this shop app show?
    let total = 280;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
20. 20.👥 A school app has 185 students, 80 teachers and 145 parents as users. Which user group is the biggest? (a) students (b) teachers (c) parents
21. 21.🧭 Where is a tab bar usually placed in a phone app? (a) inside a button (b) at the bottom (c) nowhere (d) in the middle
22. 22.🎯 Is this a user need or a feature: “Small text is hard”? (a) a feature (b) a user need
23. 23.👆 What kind of event is this: one second passes? (a) a text event (b) a load event (c) a timer event (d) a tap event
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Back button: 52 px tall
    Cancel button: 24 px tall
    Start button: 52 px tall (a) Cancel (b) Start (c) Next (d) Back
25. 25.Which of these happens at the release stage? (a) talk to possible users (b) write the store text (c) spot a problem to solve (d) list what users need
26. 26.🎯 Is this a user need or a feature: “What should I cook?”? (a) a user need (b) a feature
27. 27.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(36));
28. 28.🎯 Which app would help this user most: a teen learning to make snacks? (a) a big-text reader (b) a bus tracker (c) a recipe finder (d) a pocket-money tracker
29. 29.True or false: a bus tracker is the best fit for a parent waiting at the bus stop. (a) True (b) False
30. 30.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    losing water bottles: 8 votes
    no quiet study place: 16 votes
    missing the bus: 23 votes (a) no quiet study place (b) missing the bus (c) losing water bottles
31. 31.🐞 After fixing a bug you should ___. (a) delete the test (b) release at once (c) never test (d) test it again
32. 32.🚀 Which version is newer: 3.19.2 or 3.5.3? (a) 3.5.3 (b) 3.19.2
33. 33.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(600) → expected 0
    Test 2: delivery(400) → expected 40
    Test 3: delivery(500) → expected 0
34. 34.True or false: a puzzle with levels is a game. (a) True (b) False
35. 35.Which of these is true of a website? (a) has a web address (b) comes from an app store (c) is installed on a phone (d) has a home-screen icon
36. 36.True or false: a website needs no installing. (a) False (b) True
37. 37.💡 Does an app idea like a lost-and-found board solve a real problem? (a) No (b) Yes
38. 38.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Results → Size → Confirm → Pens
    Design B: Home → Confirm → Address → Pay → Offers → Size → Pens
39. 39.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Match report”
    2. tap Back
    3. open “Badges”
    4. tap Back
    How many times must you tap Back to reach the main screen of this tab?
40. 40.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) helps everyone (b) makes it harder

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