App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 882 · 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.🛠️ At which stage do you write the code? (a) the test stage (b) the build stage (c) the idea stage (d) the plan stage
2. 2.🚀 Your app is at version 3.9.7. The next release is a big redesign that changes how the app works. What is its version number? (a) 3.10.0 (b) 4.0.0 (c) 3.10.7 (d) 3.9.8
3. 3.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
   1. open “Help page”
   2. open “Help page”
   3. open “Match report”
   4. tap Back
   5. tap the Lessons tab
   How many times must you tap Back to reach the main screen of this tab?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 68 px tall
   Help button: 60 px tall
   Start button: 28 px tall (a) Help (b) Done (c) Start
5. 5.📱 Which one opens from a link: an app or a website? (a) an app (b) a website
6. 6.Which of these is true of a website? (a) updates from the store (b) is installed on a phone (c) has a web address (d) comes from an app store
7. 7.🔍 Which is the odd one out? (a) a flashcard trainer (b) a spelling coach (c) a times-table quiz (d) a water reminder
8. 8.🔢 In a sign-up flow, which comes first: “enter the code sent” or “open the app”? (a) enter the code sent (b) open the app
9. 9.🔁 What number does this code show?
   let runs = [41, 21, 21, 22, 88];
   let count = 0;
   for (let i = 0; i < runs.length; i++) {
     if (runs[i] >= 50) {
       count = count + 1;
     }
   }
   show(count);
10. 10.💾 pop() takes off the last item. What does this code show?
    let songs = ["Stars", "Rain", "Ocean", "Sunrise", "Kites"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Ocean (b) Rain (c) Stars (d) Sunrise
11. 11.♿ Showing right or wrong only in red and green is a problem for ___. (a) the server (b) colour-blind users (c) fast typists (d) the battery
12. 12.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on yellow
13. 13.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “no quiet study place”?
    losing water bottles: 18 votes
    no quiet study place: 22 votes
    forgetting homework: 23 votes
14. 14.🔢 After an app is released, which comes FIRST? (a) read user reviews (b) fix and improve (c) release an update (d) list what to fix
15. 15.🔍 Which is the odd one out? (a) an alarm clock (b) a times-table quiz (c) a torch (d) a calculator
16. 16.🐞 What is a good first step when an app gives a wrong result? (a) delete the app (b) add more colours (c) buy a new phone (d) find where it goes wrong
17. 17.🗂️ What kind of app is a cricket run chase? (a) a learning app (b) a game (c) a health app (d) a tool app
18. 18.True or false: a final design is a quick sketch. (a) True (b) False
19. 19.🛠️ At which stage do you add the buttons? (a) the idea stage (b) the plan stage (c) the test stage (d) the build stage
20. 20.🔁 What number does this code show?
    let marks = [64, 70, 49];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
21. 21.✏️ Why draw a wireframe before coding? (a) it adds colours (b) it saves data (c) it runs the app (d) changes are quick
22. 22.💡 Does an app idea like a library due-date alert solve a real problem? (a) Yes (b) No
23. 23.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Confirm → Cart → Offers
    Design B: Home → Cart → Offers
24. 24.Which of these requests is fair? (a) calculator → location (b) timer → your photos (c) map app → location (d) torch → contacts
25. 25.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
26. 26.🔁 What does a loop do? (a) deletes code (b) saves photos (c) repeats code (d) draws icons
27. 27.🔐 Which permission does a homework photo scanner really need? (a) location (b) the camera (c) contacts (d) the microphone
28. 28.🔀 What does this sign-up rule show?
    let age = 9;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
29. 29.🧩 In an app, what is the settings page? (a) an input (b) data (c) a screen (d) a button
30. 30.Which of these is an input? (a) the game-over page (b) your friends list (c) tap to Save (d) a switch for dark mode
31. 31.🖼️ In this wireframe (top to bottom), what is right below the tab bar?
    [ big picture ]
    [ tab bar ]
    [ top bar ]
    [ list of items ]
    [ Save button ] (a) big picture (b) Save button (c) list of items (d) top bar
32. 32.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Address → Menu → Offers
    Design B: Home → Item → Size
33. 33.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Match report”
    2. tap Back
    3. open “Video”
    4. tap Back
    5. tap the Feed tab
    Which screen are you on now? (a) Video (b) Chat (c) Match report (d) Feed
34. 34.Which of these is true of an app? (a) updates from the store (b) needs no installing (c) has a web address (d) opens from a link
35. 35.🛠️ At which stage do you try every button? (a) the plan stage (b) the build stage (c) the release stage (d) the test stage
36. 36.True or false: a big-text reader is the best fit for a reader who finds small print hard. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a puzzle with levels (b) a word battle (c) a cricket run chase (d) a spelling coach
38. 38.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
39. 39.👆 Code that runs when an event happens is called a ___. (a) header (b) handler (c) headline (d) hashtag
40. 40.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(5) + points(0));

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