App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 551 · 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.True or false: you list what users need at the idea stage. (a) False (b) True
2. 2.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) check the answer (b) show the score (c) an avatar shop (d) show a question
3. 3.Which of these is true of a menu button? (a) goes to the last screen (b) hides extra links (c) shows 3 to 5 icons (d) switches main sections
4. 4.👥 A library app has 240 readers, 230 librarians and 90 volunteers as users. How many more readers than librarians are there?
5. 5.🔀 What does this PIN rule show?
   let pin = "292";
   if (pin.length === 4) {
     show("PIN saved");
   } else {
     show("Use 4 digits");
   } (a) Use 4 digits (b) PIN saved
6. 6.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
   1. open “Score card”
   2. tap Back
   3. tap the Feed tab
   Which screen are you on now? (a) Score card (b) Chat (c) Feed (d) Settings
7. 7.True or false: how fast a task is done is about UI (the look). (a) True (b) False
8. 8.🔀 What does this battery rule show?
   let battery = 15;
   if (battery < 20) {
     show("Low battery");
   } else {
     show("Battery OK");
   } (a) Battery OK (b) Low battery
9. 9.🔁 What number does this code show?
   let scores = [19, 17, 4, 11, 7];
   let best = 0;
   for (let i = 0; i < scores.length; i++) {
     if (scores[i] > best) {
       best = scores[i];
     }
   }
   show(best);
10. 10.📅 An app team plans for 2 days, builds for 5 days, tests for 3 days and releases on 1 more day. How many more days does building take than testing?
11. 11.🖼️ In this wireframe (top to bottom), what is right below the Add button?
    [ Add button ]
    [ filter buttons ]
    [ title text ]
    [ search box ]
    [ menu icon ]
    [ list of items ] (a) filter buttons (b) search box (c) title text (d) list of items
12. 12.🔢 When you make an app, which comes first: “test the app” or “build the app”? (a) test the app (b) build the app
13. 13.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Results → Confirm
    Design B: Home → Item → Offers → Shop → Search
14. 14.🔢 When you make an app, what comes right after “get an idea”? (a) test the app (b) build the app (c) release it (d) plan the screens
15. 15.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age < 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(12) → expected 100
    Test 3: price(8) → expected 50
16. 16.True or false: how many taps it takes is about UX (the experience). (a) True (b) False
17. 17.👆 The user taps the button 3 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) OFF (b) ON
18. 18.🧭 What does the back button usually do? (a) opens settings (b) closes all apps (c) goes to the last screen (d) deletes the page
19. 19.♿ What does a screen reader do? (a) makes text tiny (b) takes photos (c) plays music (d) reads the screen aloud
20. 20.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 42; // start at 42
    line 2: stars = stars + 2; // add 2
    line 3: stars = stars - 1; // take away 1
    line 4: stars = stars + 2; // double it
    line 5: show(stars); // show it (a) line 1 (b) line 4 (c) line 3 (d) line 2
21. 21.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) pick a theme colour (b) share tasks to friends (c) see tasks by day (d) earn stickers
22. 22.True or false: a free study-room finder solves no real problem. (a) True (b) False
23. 23.🗒️ What is a must-have feature? (a) a nice extra (b) a colour theme (c) a sound effect (d) one the app cannot skip
24. 24.💡 Does an app idea like a free study-room finder solve a real problem? (a) No (b) Yes
25. 25.True or false: you draw the user flow at the plan stage. (a) False (b) True
26. 26.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 35; // start at 35
    line 2: score = score - 1; // take away 1
    line 3: score = score + 3; // add 3
    line 4: score = score * 3; // double it
    line 5: show(score); // show it
27. 27.Which of these is true of a final design? (a) has no real colours (b) uses plain grey boxes (c) looks like the real app (d) is a quick sketch
28. 28.True or false: the font size is about UI (the look). (a) False (b) True
29. 29.True or false: a class leaderboard fits saving in the cloud. (a) False (b) True
30. 30.Which of these makes the app harder to use? (a) text that can grow (b) big touch targets (c) captions on videos (d) fast-flashing lights
31. 31.Which of these is a feature? (a) “What should I cook?” (b) a dark mode switch (c) “Small text is hard” (d) “I keep missing the bus”
32. 32.True or false: a blank grey screen solves a real problem. (a) False (b) True
33. 33.Which of these is a button? (a) a date picker (b) a switch for dark mode (c) the settings page (d) tap to Save
34. 34.True or false: a bill splitter solves a real problem. (a) False (b) True
35. 35.🔢 When you make an app, which comes first: “get an idea” or “plan the screens”? (a) plan the screens (b) get an idea
36. 36.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a final design (b) a wireframe
37. 37.🔀 In this course’s code, which sign tests “is equal to”? (a) === (b) !== (c) = (d) =>
38. 38.🔀 What number does this shop app show?
    let total = 620;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
39. 39.🗒️ Version 1 of a homework planner must be ready in 12 days. How many days are left for extras after the must-haves?
    add a homework task: 3 days
    set a due date: 1 days
    see tasks by day: 3 days
40. 40.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. tap the Search tab
    3. tap the Home tab
    4. open “Video”
    Which screen are you on now? (a) Video (b) Search (c) Profile (d) Home

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