App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 780 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 72 px tall
   Next button: 28 px tall
   Save button: 72 px tall (a) Next (b) Start (c) Save
2. 2.🔀 Which badge does this quiz app show?
   let marks = 70;
   if (marks >= 80) {
     show("Gold");
   } else if (marks >= 50) {
     show("Silver");
   } else {
     show("Bronze");
   } (a) Gold (b) Silver (c) Bronze
3. 3.👥 A school app has 115 students, 275 teachers and 225 parents as users. How many users does it have in all?
4. 4.🧪 One test case fails. Which one?
   🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
   function price(age) {
     if (age <= 10) {
       return 50;
     }
     return 100;
   }
   Test 1: price(10) → expected 100
   Test 2: price(8) → expected 50
   Test 3: price(12) → expected 100 (a) Test 1 (b) Test 3 (c) Test 2
5. 5.🧪 What is the actual result of a test? (a) what the app really does (b) what we hope for (c) the test’s number (d) the app’s name
6. 6.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
   [title] Sign Up
   [button] Send
   [button] Start
   [text box] Subject
   [text box] Email
7. 7.🎨 UX stands for user ___. (a) express (b) extra (c) example (d) experience
8. 8.💾 Where should the app save the sound on/off setting: on the phone or in the cloud? (a) on the phone (b) in the cloud
9. 9.🔀 What does >= mean? (a) not equal (b) greater than or equal (c) smaller or equal (d) less than
10. 10.True or false: a calculator is a tool app. (a) False (b) True
11. 11.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(650) → expected 40
    Test 2: delivery(700) → expected 0
    Test 3: delivery(750) → expected 0
12. 12.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) log a glass of water (b) see today’s total (c) set a reminder time (d) water animations
13. 13.🎯 Which app would help this user most: a reader who finds small print hard? (a) a big-text reader (b) a water reminder (c) a bus tracker (d) a pocket-money tracker
14. 14.🚀 Your app is at version 3.1.6. The next release fixes a small bug. What is its version number? (a) 3.1.7 (b) 3.2.6 (c) 3.2.0 (d) 4.0.0
15. 15.Which of these is a button? (a) the log-in page (b) your saved notes (c) the settings page (d) tap to go Next
16. 16.🔐 Which permission does a selfie sticker app really need? (a) the camera (b) contacts (c) location (d) the microphone
17. 17.🔢 In a photo-post flow, which comes LAST? (a) post the photo (b) take the photo (c) open the camera screen (d) add a filter
18. 18.Which of these is a user need? (a) a reminder alarm (b) “What should I cook?” (c) a search bar (d) a share button
19. 19.🧰 Why write a function? (a) to slow the app (b) to make code longer (c) to reuse code (d) to hide errors
20. 20.🔀 What does this sign-up rule show?
    let age = 12;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
21. 21.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(4) + points(4));
22. 22.♿ A screen has 12 icon buttons. Only 8 of them have a text label for screen readers. How many still need a label?
23. 23.🎯 An app for “everyone” with no clear user usually ___. (a) wins every prize (b) needs no testing (c) helps nobody well (d) is easy to build
24. 24.💾 What is a variable? (a) a phone setting (b) a picture (c) a type of screen (d) a named box for a value
25. 25.🎨 Is this about UI or UX: how many taps it takes? (a) UX (b) UI
26. 26.🔍 Which is the odd one out? (a) fast-flashing lights (b) big touch targets (c) labels on every icon (d) captions on videos
27. 27.👥 A library app has 55 readers, 145 librarians and 270 volunteers as users. How many users does it have in all?
28. 28.Which of these is about UI (the look)? (a) how users feel after (b) the theme colours (c) how easy sign-up is (d) whether users get lost
29. 29.🎯 Which app would help this user most: a parent waiting at the bus stop? (a) a homework planner (b) a water reminder (c) a bus tracker (d) a big-text reader
30. 30.True or false: a flashcard trainer is a learning app. (a) False (b) True
31. 31.True or false: the user presses Save is a tap event. (a) False (b) True
32. 32.🧩 Which part lets the user give the app information? (a) an icon (b) a logo (c) a title (d) an input
33. 33.🗂️ What kind of app is a racing challenge? (a) a health app (b) a game (c) a tool app (d) a learning app
34. 34.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
35. 35.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(1150) → expected 0
    Test 2: delivery(1000) → expected 0
    Test 3: delivery(550) → expected 40
36. 36.Which of these app ideas solves a real problem? (a) a medicine reminder (b) a blank grey screen (c) an app that just says hi (d) a page of random dots
37. 37.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(11));
38. 38.🛠️ At which stage do you spot a problem to solve? (a) the test stage (b) the plan stage (c) the idea stage (d) the build stage
39. 39.True or false: a voice recorder needs the microphone. (a) True (b) False
40. 40.🗒️ In MVP, the M stands for ___. (a) minimum (b) maximum (c) music (d) mobile

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