App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 338 · 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.🗒️ Version 1 of a pocket-money tracker must be ready in 11 days. How many days are left for extras after the must-haves?
   add money received: 1 days
   add money spent: 2 days
   show the balance: 4 days
2. 2.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
   button.onTap = function () {
     label.text = "Welcome, " + nameBox.text + "!";
   }; (a) Welcome, nameBox.text! (b) Welcome! (c) Riya (d) Welcome, Riya!
3. 3.📅 An app team plans for 3 days, builds for 7 days, tests for 2 days and releases on 1 more day. How many days does the whole project take?
4. 4.🧪 One test case fails. Which one?
   🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
   function delivery(total) {
     if (total > 800) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(1000) → expected 0
   Test 2: delivery(800) → expected 0
   Test 3: delivery(650) → expected 40 (a) Test 2 (b) Test 1 (c) Test 3
5. 5.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(50, 6));
6. 6.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
   Design A: Home → Pens → Size → Confirm → Shop
   Design B: Home → Address → Menu → Pay → Search → Results → Pens (a) Design B (b) Design A
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 72 px tall
   Next button: 48 px tall
   Done button: 40 px tall (a) Send (b) Done (c) Next
8. 8.🔐 Which permission does a homework photo scanner really need? (a) the microphone (b) contacts (c) location (d) the camera
9. 9.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let coins = 34; // start at 32
   line 2: coins = coins * 2; // double it
   line 3: coins = coins + 2; // add 2
   line 4: show(coins); // show it
10. 10.🔢 In a quiz-app flow, which comes first: “tap “Start quiz”” or “see if it is right”? (a) see if it is right (b) tap “Start quiz”
11. 11.🚀 Which version is newer: 1.4.10 or 1.4.7? (a) 1.4.7 (b) 1.4.10
12. 12.🔢 In a photo-post flow, what comes right after “add a filter”? (a) open the camera screen (b) take the photo (c) post the photo (d) write a caption
13. 13.🔍 Which is the odd one out? (a) list what users need (b) spot a problem to solve (c) pick the features (d) talk to possible users
14. 14.🗒️ The first small, working version of an app is often called an ___. (a) FAQ (b) URL (c) MVP (d) CPU
15. 15.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Confirm → Cart → Menu → Results → Offers → Shop
    Design B: Home → Search → Cart → Size → Offers → Pay (a) Design A (b) Design B
16. 16.🔀 What does this PIN rule show?
    let pin = "1379";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) Use 4 digits (b) PIN saved
17. 17.🔢 In a sign-up flow, which comes FIRST? (a) make a password (b) enter the code sent (c) open the app (d) see the home screen
18. 18.🧩 In an app, what is a date picker? (a) an input (b) data (c) a button (d) a screen
19. 19.🔁 What number does this code show?
    let runs = [17, 1, 3, 2, 19];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
20. 20.🚀 Your app is at version 4.6.2. The next release adds a new feature. What is its version number? (a) 4.6.3 (b) 4.7.0 (c) 5.0.0 (d) 4.7.2
21. 21.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ top bar ]
    [ title text ]
    [ search box ]
    [ Save button ]
    [ list of items ] (a) title text (b) Save button (c) list of items (d) search box
22. 22.Which of these is a user need? (a) a search bar (b) “I keep missing the bus” (c) a dark mode switch (d) a share button
23. 23.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
24. 24.♿ Accessibility means an app works for ___. (a) nobody (b) only the coder (c) everyone (d) only experts
25. 25.🧭 Which part of navigation goes to the last screen? (a) a tab bar (b) a menu button (c) the back button
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
27. 27.📱 Which one opens from a link: an app or a website? (a) a website (b) an app
28. 28.🎨 Is this about UI or UX: how fast a task is done? (a) UI (b) UX
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.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) show the balance (b) pie-chart colours (c) savings stickers (d) export to a file
31. 31.True or false: icons with no meaning is good button design. (a) False (b) True
32. 32.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [text box] Notes
    [text box] Due date
    [slider] Brightness
    [button] Cancel
33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.True or false: a wireframe uses plain grey boxes. (a) True (b) False
35. 35.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right >= 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(7) → expected Pass
    Test 3: result(4) → expected Try again
36. 36.True or false: “tiny tap areas” makes the app harder to use. (a) True (b) False
37. 37.Which of these is an input? (a) your high score (b) tap to Save (c) a slider for volume (d) your friends list
38. 38.🗒️ A to-do app with no “add a task” feature is ___. (a) well planned (b) missing a must-have (c) ready to release (d) a nice extra
39. 39.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 42; // start at 39
    line 2: points = points * 2; // double it
    line 3: points = points - 5; // take away 5
    line 4: show(points); // show it (a) line 2 (b) line 1 (c) line 3
40. 40.🔁 What number does this code show?
    let marks = [20, 72, 43];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);

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