App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 834 · 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.🧪 A test case is an input together with its ___. (a) screen colour (b) app icon (c) font size (d) expected result
2. 2.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
3. 3.♿ What does a screen reader do? (a) plays music (b) reads the screen aloud (c) takes photos (d) makes text tiny
4. 4.🛠️ At which stage do you let friends try it? (a) the build stage (b) the test stage (c) the plan stage (d) the release stage
5. 5.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) share tasks to friends (b) pick a theme colour (c) earn stickers (d) see tasks by day
6. 6.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let points = 37; // start at 37
   line 2: points = points * 2; // double it
   line 3: points = points + 2; // add 2
   line 4: points = points - 5; // add 5
   line 5: show(points); // show it (a) line 4 (b) line 3 (c) line 2 (d) line 1
7. 7.👥 A cricket club app has 130 players, 180 coaches and 45 fans as users. How many users does it have in all?
8. 8.🗒️ Version 1 of a pocket-money tracker must be ready in 12 days. How many days are left for extras after the must-haves?
   add money received: 1 days
   add money spent: 1 days
   show the balance: 5 days
9. 9.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let points = 43; // start at 43
   line 2: points = points - 2; // take away 2
   line 3: points = points - 2; // take away 2
   line 4: points = points + 4; // take away 4
   line 5: show(points); // show it (a) line 3 (b) line 4 (c) line 1 (d) line 2
10. 10.🔍 Which is the odd one out? (a) talk to possible users (b) list what users need (c) write down the bugs (d) spot a problem to solve
11. 11.🎯 What is the best first step to learn what users need? (a) pick the colours (b) guess on your own (c) write the code (d) ask and watch users
12. 12.🧩 In an app, what is a slider for volume? (a) a button (b) data (c) an input (d) a screen
13. 13.🧩 Which input is best for choosing a volume level? (a) a slider (b) a text box (c) a title (d) a switch
14. 14.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age <= 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(8) → expected 100
    Test 2: price(5) → expected 50
    Test 3: price(10) → expected 100
15. 15.True or false: the sound on/off setting fits saving on the phone. (a) True (b) False
16. 16.🔢 In a quiz-app flow, what comes right after “tap “Start quiz””? (a) pick an answer (b) read a question (c) see if it is right (d) see the final score
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
18. 18.🗒️ A to-do app with no “add a task” feature is ___. (a) ready to release (b) well planned (c) a nice extra (d) missing a must-have
19. 19.💾 What number does this code show?
    let points = 7;
    points = points - 6;
    points = points + 4;
    show(points);
20. 20.🗒️ Why keep version 1 small? (a) to look bigger (b) to use up storage (c) to confuse users (d) to learn from users soon
21. 21.🧩 In an app, what is tap to go Next? (a) a button (b) a screen (c) an input (d) data
22. 22.True or false: you add the buttons at the test stage. (a) False (b) True
23. 23.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) see tasks by day (b) add a homework task (c) set a due date (d) earn stickers
24. 24.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. tap the Lessons tab
    3. open “Video”
    Which screen are you on now? (a) Video (b) Me (c) Lessons (d) Quiz
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. tap the Home tab
    3. tap the Home tab
    4. open “Help page”
    5. tap Back
    How many times must you tap Back to reach the main screen of this tab?
26. 26.Which of these is data? (a) today’s step count (b) a box to type a name (c) the log-in page (d) tap to go Next
27. 27.Which of these happens at the build stage? (a) talk to possible users (b) list what users need (c) write down the bugs (d) write the code
28. 28.🔀 What does this battery rule show?
    let battery = 7;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
29. 29.💡 After a survey, which need should version 1 solve? (a) a random need (b) the newest trend (c) the rarest need (d) the most common need
30. 30.🧰 In function tip(bill), what is bill? (a) a parameter (b) a screen (c) a loop (d) an event
31. 31.🎨 A beautiful app that confuses everyone has ___. (a) good UX but poor UI (b) no UI at all (c) perfect UX (d) good UI but poor UX
32. 32.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Edit photo”
    2. open “Score card”
    3. tap Back
    How many times must you tap Back to reach the main screen of this tab?
33. 33.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a final design (b) a wireframe
34. 34.🎨 UX stands for user ___. (a) express (b) experience (c) extra (d) example
35. 35.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 60;
    }
    show(fee(3) + fee(4));
36. 36.🧩 How many buttons does this app screen have?
    [title] Sign Up
    [text box] Due date
    [text box] Email
    [button] Save
    [button] Help
    [button] Start
    [text box] City
37. 37.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) show arrival time (c) a dark mode (d) pick your bus stop
38. 38.💾 What number does this code show?
    let friends = ["Kabir", "Aman"];
    friends.push("Riya");
    friends.push("Zoya");
    show(friends.length);
39. 39.💾 What number does this code show?
    let songs = ["Rain", "Ocean"];
    songs.push("Sunrise");
    show(songs.length);
40. 40.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(20, 2));

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