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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 660 · 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.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Badges”
    2. tap the Profile tab
    3. open “Video”
    Which screen are you on now?     (a) Video (b) Badges (c) Search (d) Home
  2. 2.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) processing (c) input
  3. 3.True or false: a step counter is a health app. (a) False (b) True
  4. 4.🔍 Which is the odd one out? (a) sudden loud sounds (b) colour as the only clue (c) icons with no labels (d) strong colour contrast
  5. 5.Which of these is true of an app? (a) has a web address (b) has a home-screen icon (c) opens from a link (d) opens in a web browser
  6. 6.🛠️ At which stage do you share the download link? (a) the idea stage (b) the test stage (c) the plan stage (d) the release stage
  7. 7.💾 What does this code show? (Positions start at 0.)
    let friends = ["Riya", "Arjun", "Kabir"];
    show(friends[2]);     (a) Kabir (b) Arjun (c) Riya
  8. 8.👆 The user taps the button 8 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 2) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  9. 9.🔁 What number does this code show?
    let marks = [19, 16, 2];
    let best = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] > best) {
        best = marks[i];
      }
    }
    show(best);
  10. 10.🗒️ Version 1 of a homework planner must be ready in 8 days. How many days are left for extras after the must-haves?
    add a homework task: 3 days
    set a due date: 1 days
    see tasks by day: 4 days
  11. 11.🔀 When does the else part run? (a) when the test is false (b) when the test is true (c) never (d) always
  12. 12.🔀 A screen with no way forward or back is called a ___. (a) tab bar (b) home screen (c) shortcut (d) dead end
  13. 13.🔁 What is the LAST line this code shows?
    let names = ["Zoya", "Riya", "Meera", "Aman", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Zoya (b) Hi, Riya (c) Hi, Kabir (d) Hi, Meera
  14. 14.🔢 In a photo-post flow, what comes right after “take the photo”? (a) post the photo (b) add a filter (c) write a caption (d) open the camera screen
  15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  16. 16.True or false: a medicine reminder solves no real problem. (a) True (b) False
  17. 17.👥 A cricket club app has 30 players, 65 coaches and 275 fans as users. How many users does it have in all?
  18. 18.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Settings
    [text box] Age
    [button] Next
    [text box] Subject
    [button] Start
  19. 19.🧩 Which part lets the user give the app information? (a) an icon (b) a title (c) an input (d) a logo
  20. 20.💾 Where should the app save chat messages to friends: on the phone or in the cloud? (a) on the phone (b) in the cloud
  21. 21.🔐 Is this permission request fair or too much: torch → contacts? (a) fair (b) too much
  22. 22.True or false: your saved notes is an input. (a) False (b) True
  23. 23.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Pens → Item → Menu
    Design B: Home → Offers → Pens → Pay → Menu → Search → Shop
  24. 24.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 600 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 600) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(650) → expected 0
    Test 2: delivery(600) → expected 0
    Test 3: delivery(400) → expected 40
  25. 25.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age <= 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(19) → expected 100
    Test 2: price(9) → expected 50
    Test 3: price(13) → expected 100     (a) Test 3 (b) Test 2 (c) Test 1
  26. 26.🖼️ In this wireframe (top to bottom), what is right above the big picture?
    [ top bar ]
    [ big picture ]
    [ list of items ]
    [ search box ]
    [ Save button ]
    [ menu icon ]     (a) Save button (b) menu icon (c) search box (d) top bar
  27. 27.🔀 What does this battery rule show?
    let battery = 62;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Battery OK (b) Low battery
  28. 28.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Me tab
    2. open “Friend list”
    3. open “Help page”
    Which screen are you on now?     (a) Lessons (b) Friend list (c) Help page (d) Quiz
  29. 29.📊 Survey: which problem bugs you most? How many students voted in all?
    forgetting birthdays: 7 votes
    no quiet study place: 23 votes
    wasting pocket money: 16 votes
  30. 30.Which of these is a button? (a) the home page of an app (b) the game-over page (c) the settings page (d) tap to Send
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  32. 32.👥 A clinic app has 190 patients, 25 doctors and 45 nurses as users. Which user group is the biggest? (a) nurses (b) patients (c) doctors
  33. 33.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ menu icon ]
    [ title text ]
    [ filter buttons ]
    [ top bar ]
    [ Save button ]     (a) filter buttons (b) title text (c) top bar (d) Save button
  34. 34.Which of these is a screen? (a) tap to Save (b) tap to Start (c) the log-in page (d) a box to type a name
  35. 35.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 35; // start at 34
    line 2: lives = lives + 5; // add 5
    line 3: lives = lives * 2; // double it
    line 4: lives = lives + 6; // add 6
    line 5: show(lives); // show it     (a) line 4 (b) line 3 (c) line 1 (d) line 2
  36. 36.💾 Where should the app save your last game level: on the phone or in the cloud? (a) on the phone (b) in the cloud
  37. 37.🧪 A test case is an input together with its ___. (a) app icon (b) font size (c) screen colour (d) expected result
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 234; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 3 (b) line 1 (c) line 4 (d) line 2
  39. 39.🧭 Which part of navigation undoes one move? (a) a menu button (b) the back button (c) a tab bar
  40. 40.🔢 When you make an app, which comes first: “release it” or “test the app”? (a) test the app (b) release it

Answer key

  1. Video
  2. input
  3. True
  4. strong colour contrast
  5. has a home-screen icon
  6. the release stage
  7. Kabir
  8. 2
  9. 19
  10. 0
  11. when the test is false
  12. dead end
  13. Hi, Kabir
  14. add a filter
  15. good design
  16. False
  17. 370
  18. 2
  19. an input
  20. in the cloud
  21. too much
  22. False
  23. 3
  24. 0
  25. Test 3
  26. top bar
  27. Battery OK
  28. Help page
  29. 46
  30. tap to Send
  31. 12
  32. patients
  33. Save button
  34. the log-in page
  35. line 1
  36. on the phone
  37. expected result
  38. line 3
  39. the back button
  40. test the app

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