App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 110 · 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.♿ A screen has 11 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
2. 2.True or false: the settings page is a button. (a) True (b) False
3. 3.🔀 Which badge does this quiz app show?
   let marks = 100;
   if (marks >= 80) {
     show("Gold");
   } else if (marks >= 50) {
     show("Silver");
   } else {
     show("Bronze");
   } (a) Bronze (b) Gold (c) Silver
4. 4.✏️ Is this true of a wireframe or of a final design: uses the final pictures? (a) a wireframe (b) a final design
5. 5.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let lives = 34; // start at 33
   line 2: lives = lives + 4; // add 4
   line 3: lives = lives + 2; // add 2
   line 4: lives = lives + 5; // add 5
   line 5: show(lives); // show it
6. 6.🖼️ In this wireframe (top to bottom), what is right above the title text?
   [ top bar ]
   [ title text ]
   [ menu icon ]
   [ tab bar ] (a) tab bar (b) top bar (c) menu icon
7. 7.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let lives = 33; // start at 33
   line 2: lives = lives - 7; // take away 5
   line 3: lives = lives + 3; // add 3
   line 4: lives = lives + 4; // add 4
   line 5: show(lives); // show it
8. 8.🧰 What number does this code show?
   function double(n) {
     return n * 2;
   }
   show(double(18));
9. 9.True or false: a slider for volume is data. (a) True (b) False
10. 10.🧩 How many buttons does this app screen have?
    [title] Sign Up
    [text box] Email
    [button] Back
    [slider] Text size
11. 11.Which of these makes the app harder to use? (a) captions on videos (b) big touch targets (c) icons with no labels (d) text that can grow
12. 12.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Friend list”
    2. open “Map”
    3. tap Back
    4. tap the Chat tab
    How many times must you tap Back to reach the main screen of this tab?
13. 13.📊 Survey: which problem bugs you most? How many more votes did “wasting pocket money” get than “losing water bottles”?
    wasting pocket money: 15 votes
    forgetting homework: 4 votes
    losing water bottles: 9 votes
14. 14.🗂️ What kind of app is a times-table quiz? (a) a game (b) a learning app (c) a health app (d) a tool app
15. 15.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age < 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(17) → expected 100
    Test 2: price(13) → expected 100
    Test 3: price(9) → expected 50
16. 16.True or false: tap to Save is a button. (a) False (b) True
17. 17.💡 Which app idea solves this problem: bottles go missing at school? (a) a study-room finder (b) a homework planner (c) a medicine reminder (d) a lost-and-found board
18. 18.Which of these requests is fair? (a) calculator → location (b) torch → contacts (c) quiz app → microphone (d) calling app → contacts
19. 19.🔢 In a photo-post flow, what comes right after “add a filter”? (a) open the camera screen (b) post the photo (c) write a caption (d) take the photo
20. 20.True or false: a blank grey screen solves a real problem. (a) False (b) True
21. 21.True or false: a recipe finder is the best fit for a cook with no idea for dinner. (a) True (b) False
22. 22.🔀 What does >= mean? (a) not equal (b) greater than or equal (c) smaller or equal (d) less than
23. 23.🔁 What number does this code show?
    let scores = [7, 2, 12];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
24. 24.🗒️ In MVP, the M stands for ___. (a) maximum (b) music (c) mobile (d) minimum
25. 25.Which of these is true of an app? (a) opens from a link (b) is installed on a phone (c) has a web address (d) opens in a web browser
26. 26.💡 Which app idea solves this problem: the library is always full? (a) a lost-and-found board (b) a medicine reminder (c) a study-room finder (d) a bill splitter
27. 27.💾 What number does this code show?
    let friends = ["Arjun", "Kabir", "Riya"];
    friends.push("Aman");
    friends.push("Zoya");
    show(friends.length);
28. 28.True or false: today’s step count is a screen. (a) True (b) False
29. 29.🔀 What does if / else let an app do? (a) draw a screen (b) repeat forever (c) pick one of two actions (d) save a photo
30. 30.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(90, 3));
31. 31.🖼️ How many parts (boxes) does this wireframe have?
    [ Save button ]
    [ Add button ]
    [ tab bar ]
    [ top bar ]
32. 32.True or false: photos on two devices fits saving in the cloud. (a) False (b) True
33. 33.🖼️ In this wireframe (top to bottom), what is right below the list of items?
    [ list of items ]
    [ title text ]
    [ Add button ]
    [ menu icon ] (a) menu icon (b) title text (c) Add button
34. 34.Which of these requests is fair? (a) camera app → camera (b) timer → your photos (c) calculator → location (d) quiz app → microphone
35. 35.👆 The user taps the button 1 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
36. 36.🎯 Why learn about users before you build? (a) to slow it down (b) to make it longer (c) to build what they need (d) to pick a logo
37. 37.True or false: you share the download link at the release stage. (a) False (b) True
38. 38.👆 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) OFF (b) ON
39. 39.🔢 After an app is released, which comes first: “test it again” or “read user reviews”? (a) test it again (b) read user reviews
40. 40.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 41; // start at 39
    line 2: lives = lives + 5; // add 5
    line 3: lives = lives * 2; // double it
    line 4: lives = lives + 3; // add 3
    line 5: show(lives); // show it

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