App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 543 · 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.True or false: an app updates from the store. (a) True (b) False
2. 2.🔢 In a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) enter the code sent (c) make a password (d) open the app
3. 3.🧰 What does this code show?
   function greet(name) {
     return "Hi, " + name + "!";
   }
   show(greet("Riya")); (a) Riya (b) Hi, Riya! (c) Hi, name! (d) greet
4. 4.👆 The user taps the button 4 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) ON (b) OFF
5. 5.True or false: taking a photo is an input. (a) True (b) False
6. 6.🔢 After an app is released, what comes right after “list what to fix”? (a) read user reviews (b) test it again (c) fix and improve (d) release an update
7. 7.🗒️ Version 1 of a quiz app must be ready in 8 days. How many days are left for extras after the must-haves?
   show a question: 4 days
   check the answer: 2 days
   show the score: 2 days
8. 8.🧰 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(4) + fee(7));
9. 9.🗒️ The first small, working version of an app is often called an ___. (a) FAQ (b) URL (c) MVP (d) CPU
10. 10.Which of these happens at the plan stage? (a) spot a problem to solve (b) list what users need (c) sketch the screens (d) talk to possible users
11. 11.👥 A library app has 90 readers, 120 librarians and 110 volunteers as users. How many more librarians than volunteers are there?
12. 12.🧪 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(18) → expected 100
    Test 2: price(10) → expected 50
    Test 3: price(17) → expected 100
13. 13.🗒️ In MVP, the M stands for ___. (a) music (b) maximum (c) mobile (d) minimum
14. 14.True or false: a finger hits Like is a tap event. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Save button: 32 px tall
    Back button: 48 px tall (a) Back (b) Save (c) Next
16. 16.🛠️ At which stage do you put it on an app store? (a) the plan stage (b) the release stage (c) the idea stage (d) the build stage
17. 17.🔢 In a sign-up flow, what comes right after “open the app”? (a) type name and email (b) enter the code sent (c) see the home screen (d) tap “Sign up”
18. 18.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(500) → expected 0
    Test 2: delivery(400) → expected 40
    Test 3: delivery(550) → expected 0
19. 19.True or false: “labels on every icon” helps everyone use the app. (a) True (b) False
20. 20.👥 A library app has 300 readers, 195 librarians and 270 volunteers as users. How many users does it have in all?
21. 21.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Zoya", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Arjun (b) Hi, Aman (c) Hi, Zoya
22. 22.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Edit photo”
    2. open “Friend list”
    3. open “Match report”
    How many times must you tap Back to reach the main screen of this tab?
23. 23.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age <= 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(9) → expected 100
24. 24.🔢 In a sign-up flow, what comes right after “tap “Sign up””? (a) see the home screen (b) type name and email (c) open the app (d) enter the code sent
25. 25.✏️ Why draw a wireframe before coding? (a) it adds colours (b) it runs the app (c) changes are quick (d) it saves data
26. 26.🔢 In a sign-up flow, which comes first: “type name and email” or “make a password”? (a) make a password (b) type name and email
27. 27.💾 What does this code show? (Positions start at 0.)
    let friends = ["Meera", "Riya", "Arjun", "Aman"];
    show(friends[0]); (a) Arjun (b) Meera (c) Riya (d) Aman
28. 28.🔀 When does the else part run? (a) when the test is true (b) never (c) when the test is false (d) always
29. 29.🖼️ How many parts (boxes) does this wireframe have?
    [ list of items ]
    [ search box ]
    [ Add button ]
    [ menu icon ]
    [ big picture ]
    [ title text ]
30. 30.Which of these app ideas solves a real problem? (a) an app that just says hi (b) a free study-room finder (c) a button with no action (d) a page of random dots
31. 31.🔍 Which is the odd one out? (a) strong colour contrast (b) captions on videos (c) tiny tap areas (d) big touch targets
32. 32.🔢 In a food-order flow, which comes FIRST? (a) check the cart (b) open the menu (c) track the order (d) pick a dish
33. 33.🔁 What does a loop do? (a) draws icons (b) deletes code (c) saves photos (d) repeats code
34. 34.🖼️ In this wireframe (top to bottom), what is right above the Add button?
    [ top bar ]
    [ search box ]
    [ Add button ]
    [ list of items ] (a) list of items (b) top bar (c) search box
35. 35.🔐 Which permission does a voice recorder really need? (a) contacts (b) the camera (c) the microphone (d) location
36. 36.🧩 In an app, what is a box to type a name? (a) a screen (b) data (c) an input (d) a button
37. 37.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(35));
38. 38.📱 Which one comes from an app store: an app or a website? (a) a website (b) an app
39. 39.💾 What number does this code show?
    let songs = ["Stars", "Sunrise", "Monsoon"];
    songs.push("Rain");
    show(songs.length);
40. 40.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a wireframe (b) a final design

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