App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 389 · 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.True or false: a website is installed on a phone. (a) False (b) True
2. 2.🗒️ In MVP, the M stands for ___. (a) music (b) minimum (c) mobile (d) maximum
3. 3.🧩 Which of these is a button on this screen?
   [title] Add Homework
   [text box] Subject
   [button] Help (a) Help (b) Subject
4. 4.True or false: you write the code at the release stage. (a) False (b) True
5. 5.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
   [ filter buttons ]
   [ list of items ]
   [ top bar ]
   [ search box ] (a) search box (b) filter buttons (c) top bar (d) list of items
6. 6.🚀 What should an app ask for only when it really needs it? (a) its icon (b) its name (c) a font (d) a permission
7. 7.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
   Design A: Home → Item → Menu → Pay → Results
   Design B: Home → Search → Confirm
8. 8.Which of these is true of an app? (a) is installed on a phone (b) opens from a link (c) opens in a web browser (d) needs no installing
9. 9.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(45, 4));
10. 10.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a final design (b) a wireframe
11. 11.🔀 What number does this shop app show?
    let total = 200;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
12. 12.🔢 In a photo-post flow, which comes LAST? (a) open the camera screen (b) post the photo (c) add a filter (d) write a caption
13. 13.🗒️ The first small, working version of an app is often called an ___. (a) MVP (b) CPU (c) URL (d) FAQ
14. 14.📱 Which one comes from an app store: an app or a website? (a) an app (b) a website
15. 15.True or false: “strong colour contrast” helps everyone use the app. (a) False (b) True
16. 16.🔢 In a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) enter the code sent (c) type name and email (d) open the app
17. 17.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
18. 18.🧪 What is the ACTUAL result of Test 3?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(850) → expected 0
    Test 2: delivery(750) → expected 0
    Test 3: delivery(500) → expected 40
19. 19.🧩 Scores, notes and settings that an app keeps are called ___. (a) tabs (b) buttons (c) data (d) screens
20. 20.👆 The user taps the button 4 times. What number does the label show now?
    let lives = 7;
    button.onTap = function () {
      lives = lives + 3;
      label.text = lives;
    };
21. 21.🔍 Which is the odd one out? (a) the theme colours (b) the font size (c) how fast a task is done (d) the icon shapes
22. 22.🧭 Which part of navigation switches main sections? (a) a tab bar (b) the back button (c) a menu button
23. 23.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 31; // start at 31
    line 2: lives = lives + 3; // add 3
    line 3: lives = lives - 3; // add 3
    line 4: show(lives); // show it (a) line 3 (b) line 1 (c) line 2
24. 24.🔀 Which badge does this quiz app show?
    let marks = 62;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Silver (b) Bronze (c) Gold
25. 25.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
26. 26.💾 What number does this code show?
    let friends = ["Riya", "Aman"];
    friends.push("Meera");
    show(friends.length);
27. 27.👆 The user taps the button 5 times. What number does the label show now?
    let score = 3;
    button.onTap = function () {
      score = score + 2;
      label.text = score;
    };
28. 28.🔀 In this course’s code, which sign tests “is equal to”? (a) !== (b) => (c) = (d) ===
29. 29.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting birthdays: 13 votes
    missing the bus: 11 votes
    forgetting homework: 18 votes (a) forgetting homework (b) missing the bus (c) forgetting birthdays
30. 30.🗒️ Version 1 of a homework planner must be ready in 7 days. How many days are left for extras after the must-haves?
    add a homework task: 2 days
    set a due date: 1 days
    see tasks by day: 3 days
31. 31.💾 What does this code show? (Positions start at 0.)
    let friends = ["Aman", "Meera", "Riya"];
    show(friends[0]); (a) Meera (b) Riya (c) Aman
32. 32.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 11 votes
    forgetting birthdays: 14 votes
    no quiet study place: 17 votes (a) missing the bus (b) no quiet study place (c) forgetting birthdays
33. 33.👆 Code that runs when an event happens is called a ___. (a) header (b) handler (c) headline (d) hashtag
34. 34.🔐 A torch app asks for your contacts. What should you do? (a) deny it (b) post them online (c) share them all (d) allow it
35. 35.👆 The user taps the button 5 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 2) {
        likes = likes + 1;
      }
      label.text = likes;
    };
36. 36.🐞 What is a good first step when an app gives a wrong result? (a) buy a new phone (b) add more colours (c) delete the app (d) find where it goes wrong
37. 37.True or false: a final design looks like the real app. (a) True (b) False
38. 38.Which of these app ideas solves no real problem? (a) a library due-date alert (b) a lost-and-found board (c) a button with no action (d) a medicine reminder
39. 39.Which of these is a user need? (a) a dark mode switch (b) a reminder alarm (c) a search bar (d) “I keep missing the bus”
40. 40.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Map”
    2. open “Friend list”
    3. open “Match report”
    How many times must you tap Back to reach the main screen of this tab?

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