App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 895 · 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.🎨 Fewer taps to finish a task usually means ___. (a) a bigger app (b) more colours (c) worse UX (d) better UX
2. 2.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money spent (b) pie-chart colours (c) show the balance (d) add money received
3. 3.🔁 What number does this code show?
   let marks = [18, 8, 5, 2];
   let best = 0;
   for (let i = 0; i < marks.length; i++) {
     if (marks[i] > best) {
       best = marks[i];
     }
   }
   show(best);
4. 4.🗒️ Version 1 of a quiz app must be ready in 13 days. How many days are left for extras after the must-haves?
   show a question: 2 days
   check the answer: 2 days
   show the score: 3 days
5. 5.True or false: one second passes is a timer event. (a) False (b) True
6. 6.Which of these happens at the build stage? (a) write the store text (b) write the code (c) draw the user flow (d) share the download link
7. 7.🧰 A museum app works out the entry fee. What number does this code show?
   function fee(age) {
     if (age < 5) {
       return 0;
     }
     return 30;
   }
   show(fee(5) + fee(7));
8. 8.👥 A cricket club app has 55 players, 40 coaches and 105 fans as users. How many more fans than coaches are there?
9. 9.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
10. 10.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
11. 11.Which of these helps everyone use the app? (a) tiny tap areas (b) icons with no labels (c) text that can grow (d) sudden loud sounds
12. 12.🧪 What is the actual result of a test? (a) the app’s name (b) what the app really does (c) what we hope for (d) the test’s number
13. 13.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 46; // start at 46
    line 2: lives = lives * 2; // double it
    line 3: lives = lives + 2; // double it
    line 4: lives = lives - 1; // take away 1
    line 5: show(lives); // show it
14. 14.🔀 Which badge does this quiz app show?
    let marks = 43;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Silver (b) Bronze (c) Gold
15. 15.🧩 In an app, what is the log-in page? (a) data (b) an input (c) a screen (d) a button
16. 16.💾 What number does this code show?
    let score = 8;
    score = score - 3;
    score = score + 1;
    show(score);
17. 17.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Hint: 26 px
    Footer: 21 px
    Menu: 25 px
    Body text: 26 px
    Title: 12 px (a) Title (b) Menu (c) Hint (d) Footer
18. 18.🛠️ At which stage do you connect the data? (a) the release stage (b) the idea stage (c) the build stage (d) the test stage
19. 19.⚙️ What number does this app show?
    let bill = 144; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
20. 20.🖼️ How many parts (boxes) does this wireframe have?
    [ Add button ]
    [ Save button ]
    [ big picture ]
    [ tab bar ]
21. 21.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 20;
    }
    show(fee(2) + fee(10));
22. 22.🔢 In a photo-post flow, which comes first: “post the photo” or “open the camera screen”? (a) post the photo (b) open the camera screen
23. 23.👥 A cricket club app has 220 players, 30 coaches and 145 fans as users. How many more players than coaches are there?
24. 24.True or false: an alarm clock is a tool app. (a) True (b) False
25. 25.🧪 How many of these test cases pass?
    🚚 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(650) → expected 40
    Test 2: delivery(1200) → expected 0
    Test 3: delivery(1100) → expected 0
26. 26.🧭 Which part of navigation goes to the last screen? (a) the back button (b) a menu button (c) a tab bar
27. 27.True or false: a homework photo scanner needs the camera. (a) True (b) False
28. 28.🧩 Which part lets the user give the app information? (a) an icon (b) a logo (c) a title (d) an input
29. 29.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age <= 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(18) → expected 100
    Test 2: price(11) → expected 50
    Test 3: price(19) → expected 100
30. 30.🧰 What does this code show?
    function greet(name) {
      return "Hi, " + name + "!";
    }
    show(greet("Riya")); (a) Hi, name! (b) Riya (c) greet (d) Hi, Riya!
31. 31.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) dead end (c) tab bar (d) home screen
32. 32.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Score card”
    2. tap the Me tab
    3. open “Match report”
    4. tap Back
    5. tap the Lessons tab
    Which screen are you on now? (a) Match report (b) Score card (c) Quiz (d) Lessons
33. 33.👥 A library app has 140 readers, 190 librarians and 235 volunteers as users. How many users does it have in all?
34. 34.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 40; // start at 40
    line 2: score = score + 2; // double it
    line 3: score = score + 4; // add 4
    line 4: score = score * 2; // double it
    line 5: show(score); // show it
35. 35.🔁 What number does this code show?
    let marks = [3, 13, 12, 8];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
36. 36.Which of these is about UX (the experience)? (a) the font size (b) how many taps it takes (c) the screen layout (d) the theme colours
37. 37.🗒️ What is a must-have feature? (a) a colour theme (b) a nice extra (c) one the app cannot skip (d) a sound effect
38. 38.👥 A clinic app has 165 patients, 125 doctors and 115 nurses as users. How many users does it have in all?
39. 39.Which of these is data? (a) tap to go Next (b) a date picker (c) your friends list (d) tap to Send
40. 40.📴 Which of these can often still work with no internet? (a) a new website (b) an online search (c) a video call (d) an installed app

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