← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 88 · 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.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) easy cases (b) edge cases (c) old cases (d) phone cases
  2. 2.True or false: the home page of an app is a screen. (a) True (b) False
  3. 3.True or false: a draft you are typing fits saving in the cloud. (a) True (b) False
  4. 4.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 43; // start at 43
    line 2: lives = lives * 2; // double it
    line 3: lives = lives - 5; // add 5
    line 4: show(lives); // show it     (a) line 1 (b) line 3 (c) line 2
  5. 5.🧪 What is the ACTUAL result of Test 2?
    🎟️ 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(11) → expected 100
    Test 2: price(13) → expected 100
    Test 3: price(6) → expected 50
  6. 6.👥 A library app has 25 readers, 170 librarians and 70 volunteers as users. How many more librarians than readers are there?
  7. 7.📅 An app team plans for 5 days, builds for 6 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
  8. 8.🧩 Which of these is a button on this screen?
    [title] Settings
    [text box] Notes
    [text box] Age
    [switch] Show hints
    [slider] Volume
    [button] Help
    [button] Start     (a) Age (b) Notes (c) Show hints (d) Help
  9. 9.Which of these is an input? (a) a box to type a name (b) your friends list (c) tap to Save (d) the game-over page
  10. 10.🔢 In a sign-up flow, which comes first: “type name and email” or “tap “Sign up””? (a) tap “Sign up” (b) type name and email
  11. 11.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 46; // start at 45
    line 2: lives = lives + 4; // add 4
    line 3: lives = lives + 2; // add 2
    line 4: show(lives); // show it     (a) line 1 (b) line 3 (c) line 2
  12. 12.👆 What kind of event is this: the app starts up? (a) a tap event (b) a text event (c) a timer event (d) a load event
  13. 13.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) rate the driver (b) change the bus icon (c) pick your bus stop (d) a dark mode
  14. 14.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a medicine reminder (b) a lost-and-found board (c) a homework planner (d) a bill splitter
  15. 15.♿ Does this help everyone, or make the app harder to use: icons with no labels? (a) helps everyone (b) makes it harder
  16. 16.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Settings tab
    2. open “Badges”
    3. tap Back
    Which screen are you on now?     (a) Settings (b) Chat (c) Badges (d) Feed
  17. 17.🔁 What number does this code show?
    let steps = [1, 10, 7];
    let best = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] > best) {
        best = steps[i];
      }
    }
    show(best);
  18. 18.🚀 Your app is at version 1.1.6. The next release fixes a small bug. What is its version number? (a) 1.2.0 (b) 2.0.0 (c) 1.2.6 (d) 1.1.7
  19. 19.💡 An app that tries to do everything at once is usually ___. (a) finished fast (b) easy to build (c) very small (d) hard to use
  20. 20.Which of these happens at the plan stage? (a) let friends try it (b) write the store text (c) talk to possible users (d) sketch the screens
  21. 21.🗒️ In MVP, the M stands for ___. (a) minimum (b) music (c) mobile (d) maximum
  22. 22.🔀 What does this battery rule show?
    let battery = 77;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  23. 23.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(5) → expected Pass
    Test 2: result(2) → expected Try again
    Test 3: result(7) → expected Pass
  24. 24.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Offers → Address
    Design B: Home → Shop → Size → Pay → Confirm → Pens
  25. 25.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a final design (b) a wireframe
  26. 26.🔢 After an app is released, what comes right after “read user reviews”? (a) test it again (b) release an update (c) fix and improve (d) list what to fix
  27. 27.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Video”
    2. open “Edit photo”
    3. tap Back
    4. open “Help page”
    5. tap Back
    How many times must you tap Back to reach the main screen of this tab?
  28. 28.👆 The user taps the button 1 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
  29. 29.👆 The user taps the button 3 times. What number does the label show now?
    let points = 6;
    button.onTap = function () {
      points = points + 2;
      label.text = points;
    };
  30. 30.🚀 Which version is newer: 1.17.0 or 1.5.2? (a) 1.5.2 (b) 1.17.0
  31. 31.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) see tasks by day (b) pick a theme colour (c) share tasks to friends (d) earn stickers
  32. 32.👥 A school app has 290 students, 35 teachers and 50 parents as users. Which user group is the biggest? (a) teachers (b) students (c) parents
  33. 33.🔁 What number does this code show?
    let scores = [8, 17, 18];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
  34. 34.🔢 In a photo-post flow, which comes FIRST? (a) take the photo (b) post the photo (c) add a filter (d) open the camera screen
  35. 35.Which of these is true of an app? (a) has a web address (b) opens in a web browser (c) updates from the store (d) opens from a link
  36. 36.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 50; // start at 50
    line 2: points = points + 3; // add 2
    line 3: points = points + 5; // add 5
    line 4: show(points); // show it
  37. 37.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
  38. 38.🎯 Which app would help this user most: a parent waiting at the bus stop? (a) a water reminder (b) a big-text reader (c) a bus tracker (d) a homework planner
  39. 39.True or false: taking a photo is processing. (a) True (b) False
  40. 40.🖼️ How many parts (boxes) does this wireframe have?
    [ Save button ]
    [ search box ]
    [ tab bar ]
    [ list of items ]

Answer key

  1. edge cases
  2. True
  3. False
  4. line 3
  5. 100
  6. 145
  7. 5
  8. Help
  9. a box to type a name
  10. tap “Sign up”
  11. line 1
  12. a load event
  13. pick your bus stop
  14. a medicine reminder
  15. makes it harder
  16. Settings
  17. 10
  18. 1.1.7
  19. hard to use
  20. sketch the screens
  21. minimum
  22. Battery OK
  23. 2
  24. 2
  25. a final design
  26. list what to fix
  27. 1
  28. ON
  29. 12
  30. 1.17.0
  31. see tasks by day
  32. students
  33. 18
  34. open the camera screen
  35. updates from the store
  36. 58
  37. input
  38. a bus tracker
  39. False
  40. 4

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