App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 794 · 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.🗒️ Version 1 of a quiz app must be ready in 11 days. How many days are left for extras after the must-haves?
   show a question: 3 days
   check the answer: 3 days
   show the score: 4 days
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
3. 3.🔢 In a photo-post flow, which comes FIRST? (a) take the photo (b) open the camera screen (c) add a filter (d) write a caption
4. 4.🧩 Which of these is a button on this screen?
   [title] Settings
   [button] Start
   [text box] Age
   [text box] Name
   [text box] Phone
   [button] Back
   [slider] Text size (a) Age (b) Start (c) Phone (d) Name
5. 5.True or false: a date picker is a button. (a) True (b) False
6. 6.👆 The user taps the button 6 times. What number does the label show now?
   let lives = 1;
   button.onTap = function () {
     lives = lives + 2;
     label.text = lives;
   };
7. 7.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) water animations (b) custom alert sounds (c) share your streak (d) set a reminder time
8. 8.📅 An app team plans for 2 days, builds for 5 days, tests for 1 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
9. 9.True or false: a party-invite app for friends needs the camera. (a) True (b) False
10. 10.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Order Snacks
    [text box] Notes
    [button] Cancel
    [text box] Due date
    [button] Done
11. 11.🚀 Which version is newer: 2.9.1 or 2.11.0? (a) 2.11.0 (b) 2.9.1
12. 12.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 31; // start at 31
    line 2: coins = coins + 2; // take away 2
    line 3: coins = coins - 4; // take away 4
    line 4: coins = coins * 2; // double it
    line 5: show(coins); // show it
13. 13.🗂️ What kind of app is a times-table quiz? (a) a health app (b) a game (c) a learning app (d) a tool app
14. 14.♿ Accessibility means an app works for ___. (a) only the coder (b) only experts (c) nobody (d) everyone
15. 15.👆 An event in an app is ___. (a) an app store (b) a kind of list (c) a colour theme (d) something that happens
16. 16.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Item → Pay → Size
    Design B: Home → Cart → Pens
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 32 px tall
    Save button: 40 px tall
18. 18.🧭 Which part of navigation switches main sections? (a) the back button (b) a tab bar (c) a menu button
19. 19.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) checking a password (d) a result on screen
20. 20.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) never (c) before anything (d) on day one
21. 21.🔐 Which permission does a weather-near-me app really need? (a) the microphone (b) the camera (c) contacts (d) location
22. 22.🔢 In a photo-post flow, which comes first: “take the photo” or “write a caption”? (a) take the photo (b) write a caption
23. 23.♿ A screen has 10 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
24. 24.Which of these is about UX (the experience)? (a) the font size (b) the screen layout (c) how fast a task is done (d) the button colours
25. 25.True or false: a final design has the real colours. (a) False (b) True
26. 26.🔢 When you make an app, which comes first: “test the app” or “get an idea”? (a) test the app (b) get an idea
27. 27.Which of these happens at the release stage? (a) write the code (b) sketch the screens (c) put it on an app store (d) let friends try it
28. 28.🔁 What number does this code show?
    let steps = [15, 12, 3, 2];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
29. 29.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Pay → Search → Pens → Menu → Cart
    Design B: Home → Menu → Size → Address
30. 30.🧪 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(14) → expected 100
    Test 2: price(11) → expected 50
    Test 3: price(20) → expected 100
31. 31.🧪 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(5) → expected Try again
    Test 2: result(7) → expected Pass
    Test 3: result(8) → expected Pass
32. 32.Which of these makes the app harder to use? (a) labels on every icon (b) text that can grow (c) strong colour contrast (d) tiny tap areas
33. 33.Which of these is true of a website? (a) has a home-screen icon (b) opens in a web browser (c) comes from an app store (d) updates from the store
34. 34.True or false: a website has a web address. (a) False (b) True
35. 35.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Edit photo”
    2. open “Badges”
    3. open “Match report”
    4. tap the Search tab
    How many times must you tap Back to reach the main screen of this tab?
36. 36.💾 Which can hold many values in order? (a) a single number (b) a switch (c) a button (d) a list
37. 37.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 38; // start at 36
    line 2: points = points - 2; // take away 2
    line 3: points = points - 5; // take away 5
    line 4: show(points); // show it (a) line 2 (b) line 1 (c) line 3
38. 38.Which of these is true of an app? (a) updates from the store (b) has a web address (c) needs no installing (d) opens in a web browser
39. 39.True or false: your friends list is an input. (a) False (b) True
40. 40.Which of these is processing? (a) speaking a command (b) adding up a bill (c) a buzz (vibration) (d) a result on screen

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