App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 27 · 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.📲 What happens when you tap an app’s icon? (a) the phone charges (b) the sound turns off (c) the app opens (d) the app is deleted
2. 2.👥 A cricket club app has 65 players, 265 coaches and 30 fans as users. How many users does it have in all?
3. 3.🔀 When does the else part run? (a) never (b) when the test is false (c) always (d) when the test is true
4. 4.🚀 Your app is at version 2.10.7. The next release fixes a small bug. What is its version number? (a) 2.11.0 (b) 3.0.0 (c) 2.10.8 (d) 2.11.7
5. 5.🐞 Finding and fixing bugs is called ___. (a) designing (b) decorating (c) downloading (d) debugging
6. 6.🔍 Which is the odd one out? (a) share the download link (b) connect the data (c) put it on an app store (d) write the store text
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.True or false: a selfie sticker app needs your location. (a) False (b) True
9. 9.🧭 Where is a tab bar usually placed in a phone app? (a) inside a button (b) in the middle (c) nowhere (d) at the bottom
10. 10.Which of these is true of a wireframe? (a) shows the real fonts (b) is a quick sketch (c) uses the final pictures (d) has the real colours
11. 11.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 46; // start at 46
    line 2: coins = coins * 2; // double it
    line 3: coins = coins - 2; // add 2
    line 4: show(coins); // show it
12. 12.🗒️ In MVP, the M stands for ___. (a) music (b) maximum (c) mobile (d) minimum
13. 13.🗂️ What kind of app is a spelling coach? (a) a game (b) a health app (c) a learning app (d) a tool app
14. 14.🚀 Your app is at version 1.5.9. The next release fixes a small bug. What is its version number? (a) 2.0.0 (b) 1.5.10 (c) 1.6.0 (d) 1.6.9
15. 15.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
16. 16.Which of these happens at the build stage? (a) pick the features (b) talk to possible users (c) add the buttons (d) share the download link
17. 17.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Caption: 11 px
    Body text: 20 px
    Hint: 18 px
18. 18.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
19. 19.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ Add button ]
    [ search box ]
    [ top bar ]
    [ Save button ]
    [ filter buttons ]
    [ list of items ] (a) Save button (b) list of items (c) top bar (d) Add button
20. 20.🔢 In a quiz-app flow, which comes first: “pick an answer” or “see if it is right”? (a) pick an answer (b) see if it is right
21. 21.💾 pop() takes off the last item. What does this code show?
    let friends = ["Meera", "Zoya", "Riya", "Aman"];
    friends.pop();
    show(friends[friends.length - 1]); (a) Meera (b) Aman (c) Zoya (d) Riya
22. 22.🔁 What number does this code show?
    let scores = [4, 2, 6, 16];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
23. 23.🔐 Which permission does a selfie sticker app really need? (a) the camera (b) contacts (c) location (d) the microphone
24. 24.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. open “Edit photo”
    3. tap Back
    4. tap the Home tab
    Which screen are you on now? (a) Search (b) Home (c) Score card (d) Edit photo
25. 25.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 44; // start at 41
    line 2: lives = lives * 2; // double it
    line 3: lives = lives - 1; // take away 1
    line 4: lives = lives - 4; // take away 4
    line 5: show(lives); // show it
26. 26.True or false: a big-text reader is the best fit for a child saving up for a cycle. (a) True (b) False
27. 27.🧪 One test case fails. Which one?
    📝 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(5) → expected Pass
    Test 3: result(4) → expected Try again (a) Test 1 (b) Test 2 (c) Test 3
28. 28.👆 A tap handler runs how many times if the user taps 4 times? (a) 0 (b) 8 (c) 4 (d) 1
29. 29.🔐 Which permission does a barcode scanner really need? (a) the microphone (b) location (c) the camera (d) contacts
30. 30.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) show the balance (b) pie-chart colours (c) add money received (d) add money spent
31. 31.📅 An app team plans for 2 days, builds for 4 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
32. 32.True or false: you talk to possible users at the plan stage. (a) True (b) False
33. 33.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a homework planner (b) a bill splitter (c) a medicine reminder (d) a lost-and-found board
34. 34.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 46; // start at 46
    line 2: coins = coins - 5; // take away 5
    line 3: coins = coins + 6; // add 5
    line 4: coins = coins - 2; // take away 2
    line 5: show(coins); // show it
35. 35.True or false: a website comes from an app store. (a) True (b) False
36. 36.Which of these is an input? (a) a beep sound (b) sorting the scores (c) adding up a bill (d) taking a photo
37. 37.Which of these requests is fair? (a) timer → your photos (b) voice notes → microphone (c) torch → contacts (d) calculator → location
38. 38.🔢 In a sign-up flow, which comes FIRST? (a) type name and email (b) open the app (c) tap “Sign up” (d) see the home screen
39. 39.True or false: notes to read offline fits saving in the cloud. (a) True (b) False
40. 40.🔀 Which badge does this quiz app show?
    let marks = 65;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Silver (b) Bronze (c) Gold

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