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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 917 · 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.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  2. 2.🚀 Which of these versions is the OLDEST?
    2.22.6, 3.18.2, 3.10.9, 3.13.7     (a) 3.10.9 (b) 3.13.7 (c) 3.18.2 (d) 2.22.6
  3. 3.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ big picture ]
    [ search box ]
    [ top bar ]
    [ Save button ]     (a) big picture (b) top bar (c) Save button
  4. 4.👥 A library app has 100 readers, 280 librarians and 215 volunteers as users. How many users does it have in all?
  5. 5.Which of these is true of a website? (a) has a home-screen icon (b) has a web address (c) comes from an app store (d) is installed on a phone
  6. 6.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    };     (a) Hello, Riya! (b) Hello, nameBox.text! (c) Hello! (d) Riya
  7. 7.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ tab bar ]
    [ search box ]
    [ big picture ]
    [ title text ]
    [ Save button ]     (a) title text (b) Save button (c) big picture (d) tab bar
  8. 8.🎯 Which app would help this user most: a student who keeps forgetting due dates? (a) a water reminder (b) a bus tracker (c) a homework planner (d) a pocket-money tracker
  9. 9.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 36; // start at 33
    line 2: lives = lives - 2; // take away 2
    line 3: lives = lives + 4; // add 4
    line 4: lives = lives + 2; // add 2
    line 5: show(lives); // show it
  10. 10.🧪 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(9) → expected Pass
    Test 3: result(4) → expected Try again
  11. 11.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age <= 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 50
    Test 2: price(17) → expected 100
    Test 3: price(16) → expected 100
  12. 12.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 45; // start at 45
    line 2: lives = lives + 5; // add 5
    line 3: lives = lives - 5; // add 5
    line 4: lives = lives - 2; // take away 2
    line 5: show(lives); // show it
  13. 13.👆 “On tap → do this” links an event to ___. (a) a font (b) a charger (c) a web address (d) an action
  14. 14.🐞 Finding and fixing bugs is called ___. (a) debugging (b) downloading (c) decorating (d) designing
  15. 15.🛠️ At which stage do you write the code? (a) the build stage (b) the plan stage (c) the release stage (d) the test stage
  16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  17. 17.👥 A clinic app has 20 patients, 300 doctors and 215 nurses as users. How many users does it have in all?
  18. 18.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  19. 19.True or false: the search box changes is a timer event. (a) True (b) False
  20. 20.📱 The word “app” is short for ___. (a) application (b) appointment (c) apparatus (d) appetite
  21. 21.True or false: the user types a letter is a text event. (a) False (b) True
  22. 22.Which of these is an input? (a) a result on screen (b) working out a tip (c) sorting the scores (d) tapping a button
  23. 23.💾 What number does this code show?
    let songs = ["Kites", "Sunrise", "Rain", "Ocean"];
    songs.push("Monsoon");
    show(songs.length);
  24. 24.True or false: the screen layout is about UX (the experience). (a) False (b) True
  25. 25.🎯 Which app would help this user most: a teen learning to make snacks? (a) a pocket-money tracker (b) a big-text reader (c) a water reminder (d) a recipe finder
  26. 26.True or false: icons with no meaning is poor button design. (a) True (b) False
  27. 27.🧩 Which of these is a button on this screen?
    [title] Settings
    [button] Cancel
    [button] Done
    [text box] City
    [button] Send     (a) Cancel (b) City
  28. 28.🔢 In a quiz-app flow, what comes right after “read a question”? (a) tap “Start quiz” (b) see if it is right (c) pick an answer (d) see the final score
  29. 29.Which of these is an input? (a) a pop-up message (b) a buzz (vibration) (c) a result on screen (d) taking a photo
  30. 30.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 51; // start at 48
    line 2: stars = stars + 2; // add 2
    line 3: stars = stars - 5; // take away 5
    line 4: stars = stars + 6; // add 6
    line 5: show(stars); // show it
  31. 31.⚙️ What number does this app show?
    let bill = 66; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  32. 32.True or false: a slider for volume is an input. (a) True (b) False
  33. 33.🔀 In this course’s code, which sign tests “is equal to”? (a) !== (b) === (c) => (d) =
  34. 34.🗒️ Why keep version 1 small? (a) to use up storage (b) to look bigger (c) to learn from users soon (d) to confuse users
  35. 35.🔀 Which badge does this quiz app show?
    let marks = 24;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Silver (c) Gold
  36. 36.Which of these is true of a website? (a) needs no installing (b) is installed on a phone (c) has a home-screen icon (d) comes from an app store
  37. 37.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) show a question (b) show the score (c) check the answer (d) confetti effects
  38. 38.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) see tasks by day (b) set a due date (c) share tasks to friends (d) add a homework task
  39. 39.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Zoya", "Meera"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Arjun (b) Hi, Zoya (c) Hi, Meera
  40. 40.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Edit photo”
    2. tap the Me tab
    3. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?

Answer key

  1. good design
  2. 2.22.6
  3. top bar
  4. 595
  5. has a web address
  6. Hello, Riya!
  7. big picture
  8. a homework planner
  9. 40
  10. 3
  11. 3
  12. 43
  13. an action
  14. debugging
  15. the build stage
  16. poor design
  17. 535
  18. 2
  19. False
  20. application
  21. True
  22. tapping a button
  23. 5
  24. False
  25. a recipe finder
  26. True
  27. Cancel
  28. pick an answer
  29. taking a photo
  30. 51
  31. 22
  32. True
  33. ===
  34. to learn from users soon
  35. Bronze
  36. needs no installing
  37. confetti effects
  38. share tasks to friends
  39. Hi, Meera
  40. 1

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