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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 405 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 49; // start at 48
    line 2: lives = lives + 6; // add 6
    line 3: lives = lives * 2; // double it
    line 4: show(lives); // show it     (a) line 3 (b) line 1 (c) line 2
  2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.💾 What number does this code show?
    let coins = 7;
    coins = coins - 2;
    coins = coins + 5;
    show(coins);
  4. 4.True or false: a wireframe looks like the real app. (a) True (b) False
  5. 5.💾 What number does this code show?
    let coins = 4;
    coins = coins - 3;
    coins = coins + 4;
    show(coins);
  6. 6.🔀 What does if / else let an app do? (a) save a photo (b) pick one of two actions (c) repeat forever (d) draw a screen
  7. 7.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [button] Help
    [button] Next
    [switch] Dark mode
    [button] Save
    [text box] Age
    [text box] Subject
    [text box] Due date
  8. 8.🗂️ What kind of app is a word battle? (a) a learning app (b) a game (c) a tool app (d) a health app
  9. 9.📊 Survey: which problem bugs you most? How many students voted in all?
    forgetting birthdays: 8 votes
    no quiet study place: 5 votes
    forgetting homework: 18 votes
  10. 10.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 43; // start at 43
    line 2: coins = coins * 2; // double it
    line 3: coins = coins + 4; // add 3
    line 4: show(coins); // show it
  11. 11.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  12. 12.Which of these happens at the idea stage? (a) list what users need (b) add the buttons (c) write down the bugs (d) pick the features
  13. 13.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 50;
    }
    show(fee(11) + fee(2));
  14. 14.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(30, 4));
  15. 15.🔀 What does this sign-up rule show?
    let age = 9;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  16. 16.Which of these is a screen? (a) tap to go Next (b) the log-in page (c) tap to Send (d) tap to Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  18. 18.🔁 What number does this code show?
    let marks = [17, 13, 9, 3, 8];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  19. 19.🧭 Tapping a tab usually takes you to ___. (a) the phone settings (b) that tab’s main screen (c) a random page (d) the last app used
  20. 20.🎯 Which app would help this user most: a parent waiting at the bus stop? (a) a bus tracker (b) a big-text reader (c) a pocket-money tracker (d) a water reminder
  21. 21.🧩 In an app, what is today’s step count? (a) a button (b) data (c) an input (d) a screen
  22. 22.📱 Which one opens from a link: an app or a website? (a) an app (b) a website
  23. 23.✏️ What is a wireframe? (a) a type of password (b) a simple screen sketch (c) a charging cable (d) the finished app
  24. 24.Which of these is an input? (a) tap to Save (b) tap to Send (c) a date picker (d) today’s step count
  25. 25.🔍 Which is the odd one out? (a) how users feel after (b) whether users get lost (c) the icon shapes (d) how fast a task is done
  26. 26.👥 A cricket club app has 255 players, 100 coaches and 55 fans as users. Which user group is the biggest? (a) players (b) fans (c) coaches
  27. 27.📅 An app team plans for 4 days, builds for 10 days, tests for 2 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
  28. 28.🔀 What number does this shop app show?
    let total = 230;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  29. 29.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 36; // start at 36
    line 2: coins = coins - 3; // add 3
    line 3: coins = coins * 2; // double it
    line 4: coins = coins * 2; // double it
    line 5: show(coins); // show it
  30. 30.Which of these is true of a menu button? (a) undoes one move (b) opens a list of pages (c) goes to the last screen (d) switches main sections
  31. 31.🔢 In a photo-post flow, which comes LAST? (a) write a caption (b) add a filter (c) post the photo (d) open the camera screen
  32. 32.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 39; // start at 36
    line 2: stars = stars - 3; // take away 3
    line 3: stars = stars + 5; // add 5
    line 4: show(stars); // show it
  33. 33.💡 How can you check that people really have the problem? (a) copy another app (b) ask possible users (c) just guess (d) pick a colour
  34. 34.Which of these is true of a wireframe? (a) is a quick sketch (b) looks like the real app (c) shows the real fonts (d) has the real colours
  35. 35.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 30;
    }
    show(fee(6) + fee(9));
  36. 36.🚀 Your app is at version 2.2.1. The next release adds a new feature. What is its version number? (a) 3.0.0 (b) 2.3.0 (c) 2.3.1 (d) 2.2.2
  37. 37.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [button] Save
    [button] Done
    [switch] Show hints
    [text box] Subject
    [text box] Due date
  38. 38.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ top bar ]
    [ search box ]
    [ menu icon ]
    [ tab bar ]
    [ big picture ]     (a) top bar (b) tab bar (c) big picture (d) menu icon
  39. 39.🔀 Which badge does this quiz app show?
    let marks = 33;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Gold (c) Silver
  40. 40.🧪 What is the actual result of a test? (a) the test’s number (b) what the app really does (c) the app’s name (d) what we hope for

Answer key

  1. line 1
  2. easy to read
  3. 10
  4. False
  5. 5
  6. pick one of two actions
  7. 3
  8. a game
  9. 31
  10. 89
  11. 2
  12. list what users need
  13. 50
  14. 120
  15. Ask a parent
  16. the log-in page
  17. 16
  18. 50
  19. that tab’s main screen
  20. a bus tracker
  21. data
  22. a website
  23. a simple screen sketch
  24. a date picker
  25. the icon shapes
  26. players
  27. 14
  28. 230
  29. 132
  30. opens a list of pages
  31. post the photo
  32. 38
  33. ask possible users
  34. is a quick sketch
  35. 60
  36. 2.3.0
  37. 2
  38. menu icon
  39. Bronze
  40. what the app really does

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