App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 11 · 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 number does this code show?
   let scores = [12, 1, 9, 20];
   let total = 0;
   for (let i = 0; i < scores.length; i++) {
     total = total + scores[i];
   }
   show(total);
2. 2.🔢 In a food-order flow, which comes first: “check the cart” or “add it to the cart”? (a) check the cart (b) add it to the cart
3. 3.Which of these happens at the plan stage? (a) write the store text (b) pick the features (c) connect the data (d) try every button
4. 4.Which of these requests is fair? (a) camera app → camera (b) quiz app → microphone (c) timer → your photos (d) calculator → location
5. 5.🎯 Which app would help this user most: a runner who forgets to sip water? (a) a homework planner (b) a bus tracker (c) a pocket-money tracker (d) a water reminder
6. 6.🐞 What is a bug? (a) a new feature (b) a mistake in the code (c) a fast phone (d) a nice icon
7. 7.True or false: a final design has the real colours. (a) True (b) False
8. 8.👥 A clinic app has 290 patients, 85 doctors and 80 nurses as users. How many users does it have in all?
9. 9.💡 Does an app idea like an app that just says hi solve a real problem? (a) No (b) Yes
10. 10.💡 Which app idea solves this problem: the library is always full? (a) a homework planner (b) a study-room finder (c) a lost-and-found board (d) a medicine reminder
11. 11.👥 A library app has 165 readers, 255 librarians and 200 volunteers as users. How many more volunteers than readers are there?
12. 12.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(4));
13. 13.♿ Why add captions to videos? (a) so anyone can follow (b) to hide the sound (c) to add colour (d) to slow them down
14. 14.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 51; // start at 49
    line 2: stars = stars - 5; // take away 5
    line 3: stars = stars + 4; // add 4
    line 4: stars = stars * 2; // double it
    line 5: show(stars); // show it
15. 15.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age < 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(15) → expected 100
16. 16.True or false: a beep sound is an input. (a) False (b) True
17. 17.Which of these app ideas solves a real problem? (a) a button with no action (b) a blank grey screen (c) a bill splitter (d) a page of random dots
18. 18.🔢 In a sign-up flow, which comes first: “tap “Sign up”” or “enter the code sent”? (a) tap “Sign up” (b) enter the code sent
19. 19.Which of these is a user need? (a) a dark mode switch (b) a search bar (c) a reminder alarm (d) “I forget my homework”
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
21. 21.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Arjun", "Meera"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Arjun (b) Hi, Meera (c) Hi, Riya
22. 22.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(60, 2));
23. 23.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age <= 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(15) → expected 100
    Test 3: price(5) → expected 50
24. 24.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🐞 Finding and fixing bugs is called ___. (a) debugging (b) decorating (c) designing (d) downloading
26. 26.💡 After a survey, which need should version 1 solve? (a) a random need (b) the newest trend (c) the most common need (d) the rarest need
27. 27.True or false: an app has a web address. (a) True (b) False
28. 28.🚀 Your app is at version 3.2.7. The next release adds a new feature. What is its version number? (a) 3.3.0 (b) 4.0.0 (c) 3.2.8 (d) 3.3.7
29. 29.True or false: a wireframe is a quick sketch. (a) True (b) False
30. 30.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Search → Results
    Design B: Home → Cart → Pay → Confirm → Pens → Item → Address (a) Design B (b) Design A
31. 31.🛠️ At which stage do you share the download link? (a) the test stage (b) the build stage (c) the release stage (d) the plan stage
32. 32.🧰 What does return do in a function? (a) closes the screen (b) deletes the app (c) sends back a value (d) repeats the code
33. 33.📲 What happens when you tap an app’s icon? (a) the app opens (b) the app is deleted (c) the sound turns off (d) the phone charges
34. 34.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) an avatar shop (b) show the score (c) confetti effects (d) background music
35. 35.🧪 A test case is an input together with its ___. (a) app icon (b) screen colour (c) expected result (d) font size
36. 36.True or false: a blank grey screen solves a real problem. (a) False (b) True
37. 37.Which of these is a user need? (a) “Small text is hard” (b) a search bar (c) a reminder alarm (d) a dark mode switch
38. 38.🧩 Which input is best for turning something ON or OFF? (a) a title (b) a slider (c) a switch (d) a text box
39. 39.🧪 A test fails when ___. (a) the app is new (b) actual is not expected (c) the font is big (d) both are the same
40. 40.🧭 What does the back button usually do? (a) goes to the last screen (b) deletes the page (c) closes all apps (d) opens settings

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