App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 193 · 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.🧰 In function tip(bill), what is bill? (a) a parameter (b) an event (c) a screen (d) a loop
2. 2.🧪 How many of these test cases pass?
   🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
   function price(age) {
     if (age <= 10) {
       return 50;
     }
     return 100;
   }
   Test 1: price(10) → expected 100
   Test 2: price(11) → expected 100
   Test 3: price(9) → expected 50
3. 3.📱 Which one has a home-screen icon: an app or a website? (a) an app (b) a website
4. 4.🧭 Which part of navigation goes to the last screen? (a) the back button (b) a menu button (c) a tab bar
5. 5.🚀 Your app is at version 4.7.4. The next release is a big redesign that changes how the app works. What is its version number? (a) 4.8.4 (b) 4.7.5 (c) 5.0.0 (d) 4.8.0
6. 6.Which of these is true of a wireframe? (a) uses the final pictures (b) has the real colours (c) shows where things go (d) looks like the real app
7. 7.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let points = 32; // start at 32
   line 2: points = points + 5; // add 5
   line 3: points = points + 2; // double it
   line 4: points = points * 2; // double it
   line 5: show(points); // show it (a) line 3 (b) line 1 (c) line 2 (d) line 4
8. 8.💡 Which app idea solves this problem: students cannot find a quiet room? (a) a study-room finder (b) a medicine reminder (c) a homework planner (d) a bill splitter
9. 9.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) edge cases (b) phone cases (c) old cases (d) easy cases
10. 10.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) share tasks to friends (b) see tasks by day (c) pick a theme colour (d) earn stickers
11. 11.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [button] Cancel
    [text box] Phone
    [button] Send
    [text box] Notes
12. 12.🖼️ In this wireframe (top to bottom), what is right below the big picture?
    [ title text ]
    [ list of items ]
    [ top bar ]
    [ big picture ]
    [ menu icon ] (a) menu icon (b) list of items (c) top bar (d) title text
13. 13.🚀 Which of these versions is the OLDEST?
    2.8.7, 2.4.3, 2.14.0, 1.27.9 (a) 2.4.3 (b) 2.8.7 (c) 2.14.0 (d) 1.27.9
14. 14.Which of these is true of a menu button? (a) hides extra links (b) shows 3 to 5 icons (c) goes to the last screen (d) undoes one move
15. 15.Which of these happens at the release stage? (a) add the buttons (b) spot a problem to solve (c) sketch the screens (d) share the download link
16. 16.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 24 votes
    losing water bottles: 18 votes
    forgetting birthdays: 4 votes
17. 17.Which of these is true of a website? (a) is installed on a phone (b) has a home-screen icon (c) needs no installing (d) updates from the store
18. 18.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 41; // start at 40
    line 2: stars = stars - 4; // take away 4
    line 3: stars = stars * 2; // double it
    line 4: show(stars); // show it
19. 19.🎨 UI stands for user ___. (a) internet (b) input (c) interface (d) idea
20. 20.✏️ A box with a cross in a wireframe usually means ___. (a) a closed app (b) delete this (c) an error (d) a picture goes here
21. 21.🗒️ Why keep version 1 small? (a) to learn from users soon (b) to confuse users (c) to use up storage (d) to look bigger
22. 22.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting homework: 24 votes
    missing the bus: 19 votes
    wasting pocket money: 17 votes (a) wasting pocket money (b) missing the bus (c) forgetting homework
23. 23.🔍 Which is the odd one out? (a) a water reminder (b) a unit converter (c) a step counter (d) a sleep tracker
24. 24.👆 What kind of event is this: a finger hits Like? (a) a tap event (b) a load event (c) a timer event (d) a text event
25. 25.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age <= 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(14) → expected 100
    Test 2: price(15) → expected 100
    Test 3: price(10) → expected 50 (a) Test 3 (b) Test 1 (c) Test 2
26. 26.Which of these is true of an app? (a) opens from a link (b) opens in a web browser (c) has a web address (d) is installed on a phone
27. 27.Which of these fits saving in the cloud? (a) chat messages to friends (b) notes to read offline (c) the sound on/off setting (d) a draft you are typing
28. 28.✏️ What is a wireframe? (a) a charging cable (b) the finished app (c) a simple screen sketch (d) a type of password
29. 29.🗂️ What kind of app is a racing challenge? (a) a health app (b) a game (c) a learning app (d) a tool app
30. 30.True or false: a shared to-do list fits saving on the phone. (a) False (b) True
31. 31.🔢 In a sign-up flow, which comes FIRST? (a) make a password (b) tap “Sign up” (c) open the app (d) type name and email
32. 32.💡 How can you check that people really have the problem? (a) pick a colour (b) copy another app (c) ask possible users (d) just guess
33. 33.🔀 Which badge does this quiz app show?
    let marks = 74;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Gold (b) Silver (c) Bronze
34. 34.💡 Which app idea solves this problem: friends argue over who pays? (a) a medicine reminder (b) a bill splitter (c) a lost-and-found board (d) a homework planner
35. 35.⚙️ What number does this app show?
    let bill = 152; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
36. 36.True or false: one second passes is a timer event. (a) True (b) False
37. 37.🔁 What number does this code show?
    let scores = [46, 81, 20];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 40) {
        count = count + 1;
      }
    }
    show(count);
38. 38.🔁 What number does this code show?
    let marks = [6, 6, 2, 20];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
39. 39.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(32));
40. 40.True or false: the sound on/off setting fits saving in the cloud. (a) True (b) False

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