App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 379 · 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.🗒️ In MVP, the M stands for ___. (a) music (b) mobile (c) minimum (d) maximum
2. 2.🔁 What is the LAST line this code shows?
   let names = ["Riya", "Arjun", "Kabir"];
   for (let i = 0; i < names.length; i++) {
     show("Hi, " + names[i]);
   } (a) Hi, Riya (b) Hi, Arjun (c) Hi, Kabir
3. 3.🛠️ At which stage do you write the code? (a) the release stage (b) the idea stage (c) the build stage (d) the plan stage
4. 4.🧩 In an app, what is a date picker? (a) a button (b) an input (c) a screen (d) data
5. 5.🔢 After an app is released, what comes right after “fix and improve”? (a) read user reviews (b) list what to fix (c) test it again (d) release an update
6. 6.🧰 What number does this code show?
   function triple(n) {
     return n * 3;
   }
   show(triple(33));
7. 7.Which of these is a user need? (a) a reminder alarm (b) “I keep missing the bus” (c) a share button (d) a search bar
8. 8.🎯 Is this a user need or a feature: “I keep missing the bus”? (a) a feature (b) a user need
9. 9.🧰 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(1));
10. 10.✏️ What is a wireframe? (a) a type of password (b) the finished app (c) a simple screen sketch (d) a charging cable
11. 11.🔍 Which is the odd one out? (a) captions on videos (b) sudden loud sounds (c) text that can grow (d) labels on every icon
12. 12.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Edit photo”
    2. open “Edit photo”
    3. open “Score card”
    Which screen are you on now? (a) Score card (b) Search (c) Home (d) Edit photo
13. 13.🌐 Which program do you need to open a website? (a) a calculator (b) a web browser (c) a camera app (d) an app store
14. 14.Which of these is true of a wireframe? (a) is a quick sketch (b) has the real colours (c) uses the final pictures (d) shows the real fonts
15. 15.🧪 What is the ACTUAL result of Test 3?
    🎟️ 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(11) → expected 50
    Test 2: price(14) → expected 100
    Test 3: price(15) → expected 100
16. 16.Which of these is true of the back button? (a) opens a list of pages (b) shows 3 to 5 icons (c) switches main sections (d) undoes one move
17. 17.🧪 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(16) → expected 100
    Test 3: price(10) → expected 50
18. 18.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. open “Score card”
    3. tap the Quiz tab
    Which screen are you on now? (a) Me (b) Lessons (c) Quiz (d) Score card
19. 19.Which of these is true of an app? (a) updates from the store (b) opens in a web browser (c) needs no installing (d) has a web address
20. 20.👆 What kind of event is this: the app starts up? (a) a tap event (b) a timer event (c) a load event (d) a text event
21. 21.👆 A tap handler runs how many times if the user taps 4 times? (a) 0 (b) 4 (c) 1 (d) 8
22. 22.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 6 or more right answers.
    function result(right) {
      if (right >= 6) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(7) → expected Pass
    Test 2: result(10) → expected Pass
    Test 3: result(4) → expected Try again
23. 23.🔍 Which is the odd one out? (a) a torch (b) a puzzle with levels (c) a unit converter (d) a calculator
24. 24.True or false: “captions on videos” makes the app harder to use. (a) True (b) False
25. 25.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) savings stickers (b) add money spent (c) export to a file (d) pie-chart colours
26. 26.🗒️ Why keep version 1 small? (a) to learn from users soon (b) to look bigger (c) to confuse users (d) to use up storage
27. 27.🧰 What does return do in a function? (a) deletes the app (b) sends back a value (c) repeats the code (d) closes the screen
28. 28.Which of these is a user need? (a) a dark mode switch (b) a reminder alarm (c) “I forget my homework” (d) a search bar
29. 29.True or false: a 5-minute alarm ends is a load event. (a) True (b) False
30. 30.🎨 Is this about UI or UX: how easy sign-up is? (a) UI (b) UX
31. 31.Which of these is an output? (a) speaking a command (b) a beep sound (c) sorting the scores (d) working out a tip
32. 32.♿ A screen has 7 icon buttons. Only 6 of them have a text label for screen readers. How many still need a label?
33. 33.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
34. 34.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 400) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(400) → expected 0
    Test 2: delivery(550) → expected 0
    Test 3: delivery(250) → expected 40 (a) Test 1 (b) Test 3 (c) Test 2
35. 35.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
36. 36.💾 Where should the app save chat messages to friends: on the phone or in the cloud? (a) in the cloud (b) on the phone
37. 37.🔀 What does this battery rule show?
    let battery = 12;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery
38. 38.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 40;
    }
    show(fee(1) + fee(8));
39. 39.🔀 What does >= mean? (a) less than (b) smaller or equal (c) not equal (d) greater than or equal
40. 40.True or false: a draft you are typing fits saving in the cloud. (a) True (b) False

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