App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 211 · 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.📊 Survey: which problem bugs you most? How many students voted in all?
   missing the bus: 17 votes
   forgetting homework: 5 votes
   no quiet study place: 18 votes
2. 2.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) show arrival time (b) a dark mode (c) rate the driver (d) change the bus icon
3. 3.🧩 How many buttons does this app screen have?
   [title] Add Homework
   [text box] Phone
   [text box] Email
   [slider] Text size
   [button] Done
4. 4.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🗒️ Version 1 of a pocket-money tracker must be ready in 12 days. How many days are left for extras after the must-haves?
   add money received: 1 days
   add money spent: 4 days
   show the balance: 2 days
6. 6.Which of these is true of an app? (a) opens in a web browser (b) opens from a link (c) updates from the store (d) has a web address
7. 7.🚀 In version 2.5.1, which number is the major version? (a) 1 (b) 251 (c) 5 (d) 2
8. 8.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) processing (c) output
9. 9.💡 Does an app idea like a medicine reminder solve a real problem? (a) Yes (b) No
10. 10.🔀 What does this sign-up rule show?
    let age = 15;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
11. 11.🔢 In a quiz-app flow, what comes right after “pick an answer”? (a) read a question (b) see if it is right (c) tap “Start quiz” (d) see the final score
12. 12.🗒️ A to-do app with no “add a task” feature is ___. (a) a nice extra (b) ready to release (c) well planned (d) missing a must-have
13. 13.🔢 In a quiz-app flow, what comes right after “tap “Start quiz””? (a) see if it is right (b) see the final score (c) read a question (d) pick an answer
14. 14.True or false: a lost-and-found board solves no real problem. (a) False (b) True
15. 15.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) before anything (c) on day one (d) never
16. 16.🧪 What is the ACTUAL result of Test 1?
    🚚 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(950) → expected 0
    Test 2: delivery(750) → expected 40
    Test 3: delivery(1100) → expected 0
17. 17.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output
18. 18.📱 The word “app” is short for ___. (a) application (b) apparatus (c) appetite (d) appointment
19. 19.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 600 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 600) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(700) → expected 0
    Test 2: delivery(450) → expected 40
    Test 3: delivery(750) → expected 0
20. 20.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 44; // start at 44
    line 2: stars = stars + 3; // add 3
    line 3: stars = stars + 6; // add 6
    line 4: stars = stars * 3; // double it
    line 5: show(stars); // show it (a) line 3 (b) line 4 (c) line 2 (d) line 1
21. 21.Which of these is a user need? (a) “What should I cook?” (b) a reminder alarm (c) a search bar (d) a dark mode switch
22. 22.🔢 When you make an app, what comes right after “get an idea”? (a) release it (b) plan the screens (c) build the app (d) test the app
23. 23.Which of these is true of a website? (a) opens in a web browser (b) has a home-screen icon (c) is installed on a phone (d) updates from the store
24. 24.📱 Which one has a web address: an app or a website? (a) an app (b) a website
25. 25.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(5) + points(5));
26. 26.🧰 What does return do in a function? (a) deletes the app (b) closes the screen (c) sends back a value (d) repeats the code
27. 27.🔀 Why plan the user flow before building? (a) to add more taps (b) to hide the buttons (c) so each step is clear (d) to skip testing
28. 28.💾 What does this code show? (Positions start at 0.)
    let friends = ["Riya", "Zoya", "Kabir"];
    show(friends[0]); (a) Riya (b) Zoya (c) Kabir
29. 29.True or false: a homework photo scanner needs your location. (a) True (b) False
30. 30.👥 A clinic app has 270 patients, 245 doctors and 50 nurses as users. How many users does it have in all?
31. 31.🧭 Which part of navigation switches main sections? (a) a menu button (b) the back button (c) a tab bar
32. 32.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(37));
33. 33.🧪 What is the ACTUAL result of Test 1?
    🎟️ 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(12) → expected 50
    Test 2: price(14) → expected 100
    Test 3: price(17) → expected 100
34. 34.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(3) + points(1));
35. 35.🧰 How do you run (call) a function called greet? (a) greet[] (b) #greet (c) run greet (d) greet()
36. 36.💾 Where should the app save a draft you are typing: on the phone or in the cloud? (a) on the phone (b) in the cloud
37. 37.🚀 Which version is newer: 2.5.3 or 2.11.1? (a) 2.5.3 (b) 2.11.1
38. 38.🔀 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) Bronze (b) Silver (c) Gold
39. 39.💡 Which app idea solves this problem: students cannot find a quiet room? (a) a medicine reminder (b) a bill splitter (c) a study-room finder (d) a lost-and-found board
40. 40.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Results → Address → Pay → Menu → Pens → Offers
    Design B: Home → Cart → Offers → Pens → Menu (a) Design B (b) Design A

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