App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 286 · 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 a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) type name and email (c) see the home screen (d) open the app
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
3. 3.👥 A school app has 125 students, 140 teachers and 230 parents as users. How many more teachers than students are there?
4. 4.Which of these fits saving on the phone? (a) a class leaderboard (b) chat messages to friends (c) your last game level (d) a shared to-do list
5. 5.⚙️ What number does this app show?
   let km = 6; // typed by the user
   let metres = km * 1000;
   show(metres);
6. 6.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
   [title] New Note
   [button] Done
   [button] Help
   [button] Start
   [text box] Notes
   [text box] Email
7. 7.📱 Which one has a home-screen icon: an app or a website? (a) an app (b) a website
8. 8.🎯 Which app would help this user most: a pupil juggling five projects? (a) a recipe finder (b) a water reminder (c) a bus tracker (d) a homework planner
9. 9.🔀 With if / else if / else, how many parts run? (a) all of them (b) none (c) two (d) only one
10. 10.True or false: the search box changes is a tap event. (a) True (b) False
11. 11.🐞 What is a bug? (a) a mistake in the code (b) a new feature (c) a fast phone (d) a nice icon
12. 12.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) show a question (b) show the score (c) background music (d) check the answer
13. 13.🔐 Is this permission request fair or too much: map app → location? (a) too much (b) fair
14. 14.🔁 list.length tells you ___. (a) the biggest item (b) the last item (c) the first item (d) how many items it has
15. 15.🚀 A change from version 1.4.2 to 1.4.3 usually means ___. (a) a new feature (b) a new app (c) a bug fix (d) a big redesign
16. 16.True or false: a finger hits Like is a tap event. (a) False (b) True
17. 17.True or false: a lost-and-found board solves no real problem. (a) True (b) False
18. 18.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) on the phone (b) in the cloud
19. 19.🔐 Which permission does a barcode scanner really need? (a) location (b) the camera (c) contacts (d) the microphone
20. 20.🧪 Who else should try an app before release? (a) only the coder (b) real users (c) the app icon (d) nobody
21. 21.🧭 Which part of navigation switches main sections? (a) a menu button (b) a tab bar (c) the back button
22. 22.🗒️ A to-do app with no “add a task” feature is ___. (a) well planned (b) a nice extra (c) ready to release (d) missing a must-have
23. 23.🐞 A comment in code (after //) is for ___. (a) the battery (b) people reading the code (c) the app store (d) the phone screen
24. 24.🧪 How many of these test cases pass?
    🎟️ 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(14) → expected 100
    Test 2: price(8) → expected 100
    Test 3: price(4) → expected 50
25. 25.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) helps everyone (b) makes it harder
26. 26.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) change the bus icon (b) rate the driver (c) a dark mode (d) show arrival time
27. 27.📅 An app team plans for 5 days, builds for 4 days, tests for 2 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
28. 28.🖼️ How many parts (boxes) does this wireframe have?
    [ tab bar ]
    [ top bar ]
    [ Add button ]
    [ list of items ]
29. 29.♿ A screen has 7 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
30. 30.👆 The user types Kabir in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Welcome, " + nameBox.text + "!";
    }; (a) Welcome, Kabir! (b) Kabir (c) Welcome! (d) Welcome, nameBox.text!
31. 31.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 8 or more right answers.
    function result(right) {
      if (right > 8) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(8) → expected Pass
    Test 2: result(10) → expected Pass
    Test 3: result(5) → expected Try again (a) Test 1 (b) Test 3 (c) Test 2
32. 32.True or false: a voice recorder needs your location. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) big touch targets (b) fast-flashing lights (c) strong colour contrast (d) captions on videos
34. 34.Which of these is true of a tab bar? (a) switches main sections (b) hides extra links (c) opens a list of pages (d) goes to the last screen
35. 35.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(7));
36. 36.🚀 Your app is at version 4.6.5. The next release adds a new feature. What is its version number? (a) 4.6.6 (b) 4.7.0 (c) 5.0.0 (d) 4.7.5
37. 37.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 26 px
    Menu: 14 px
    Hint: 25 px (a) Menu (b) Label (c) Hint
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.👆 The user types Zoya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Welcome, " + nameBox.text + "!";
    }; (a) Welcome! (b) Zoya (c) Welcome, Zoya! (d) Welcome, nameBox.text!
40. 40.👆 The user taps the button 5 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) ON (b) OFF

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