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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 859 · 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.🧪 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(10) → expected 50
    Test 2: price(13) → expected 100
    Test 3: price(14) → expected 100
  2. 2.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Cart → Pens → Confirm → Offers → Item
    Design B: Home → Shop → Confirm → Offers
  3. 3.🧪 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(8) → expected Pass
    Test 2: result(10) → expected Pass
    Test 3: result(4) → expected Try again
  4. 4.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) see today’s total (b) water animations (c) custom alert sounds (d) share your streak
  5. 5.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 7 or more right answers.
    function result(right) {
      if (right > 7) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(7) → expected Pass
    Test 2: result(9) → expected Pass
    Test 3: result(6) → expected Try again     (a) Test 3 (b) Test 2 (c) Test 1
  6. 6.🎯 Which app would help this user most: a teen whose money runs out by Friday? (a) a recipe finder (b) a pocket-money tracker (c) a water reminder (d) a bus tracker
  7. 7.📅 An app team plans for 2 days, builds for 7 days, tests for 3 days and releases on 1 more day. How many days does the whole project take?
  8. 8.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Kabir", "Zoya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Riya (b) Hi, Kabir (c) Hi, Zoya
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  10. 10.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Friend list”
    2. tap the Search tab
    3. open “Video”
    4. tap the Search tab
    5. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?
  11. 11.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 8 votes
    forgetting birthdays: 21 votes
    forgetting homework: 25 votes
  12. 12.Which of these is a user need? (a) a share button (b) a search bar (c) “I keep missing the bus” (d) a reminder alarm
  13. 13.📊 Survey: which problem bugs you most? How many students voted in all?
    forgetting homework: 21 votes
    forgetting birthdays: 22 votes
    losing water bottles: 6 votes
  14. 14.🧩 How many buttons does this app screen have?
    [title] Sign Up
    [text box] Due date
    [button] Next
    [button] Back
    [text box] Email
  15. 15.True or false: a bill splitter solves no real problem. (a) True (b) False
  16. 16.🧩 Which part lets the user give the app information? (a) an input (b) a title (c) a logo (d) an icon
  17. 17.🔐 Which permission does a selfie sticker app really need? (a) contacts (b) the microphone (c) location (d) the camera
  18. 18.💾 Data saved only on the phone is lost when ___. (a) you send a message (b) the screen turns off (c) the phone is lost (d) the app is closed
  19. 19.🔢 In a food-order flow, which comes first: “add it to the cart” or “track the order”? (a) track the order (b) add it to the cart
  20. 20.💾 Where should the app save chat messages to friends: on the phone or in the cloud? (a) in the cloud (b) on the phone
  21. 21.⚙️ What number does this app show?
    let bill = 196; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
  22. 22.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) in the cloud (b) on the phone
  23. 23.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) a beep sound (d) speaking a command
  24. 24.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(3));
  25. 25.🧰 What is a function? (a) a named block of code (b) a type of phone (c) a screen size (d) a list of colours
  26. 26.Which of these is data? (a) the log-in page (b) a date picker (c) the settings page (d) your high score
  27. 27.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “forgetting homework”?
    forgetting homework: 6 votes
    no quiet study place: 24 votes
    missing the bus: 25 votes
  28. 28.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
  29. 29.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 33; // start at 33
    line 2: lives = lives - 2; // add 2
    line 3: lives = lives - 1; // take away 1
    line 4: lives = lives * 2; // double it
    line 5: show(lives); // show it     (a) line 4 (b) line 1 (c) line 2 (d) line 3
  30. 30.📊 Survey: which problem bugs you most? How many students voted in all?
    forgetting homework: 8 votes
    missing the bus: 9 votes
    wasting pocket money: 25 votes
  31. 31.💡 Which app idea solves this problem: a team shares one snack bill? (a) a study-room finder (b) a lost-and-found board (c) a homework planner (d) a bill splitter
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Save button: 52 px tall
    Done button: 56 px tall
    Cancel button: 48 px tall
  33. 33.🔢 In a photo-post flow, what comes right after “take the photo”? (a) write a caption (b) post the photo (c) add a filter (d) open the camera screen
  34. 34.🔢 In a food-order flow, what comes right after “add it to the cart”? (a) pay for the order (b) pick a dish (c) check the cart (d) track the order
  35. 35.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ list of items ]
    [ search box ]
    [ top bar ]
    [ tab bar ]     (a) tab bar (b) search box (c) top bar (d) list of items
  36. 36.⚙️ What number does this app show?
    let price = 280; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
  37. 37.🗂️ What kind of app is a racing challenge? (a) a tool app (b) a health app (c) a game (d) a learning app
  38. 38.⚙️ What number does this app show?
    let km = 13; // typed by the user
    let metres = km * 1000;
    show(metres);
  39. 39.🔢 In a photo-post flow, which comes LAST? (a) write a caption (b) open the camera screen (c) take the photo (d) post the photo
  40. 40.🚀 Which of these versions is the NEWEST?
    4.13.3, 3.29.8, 4.10.0, 4.6.0     (a) 4.6.0 (b) 4.10.0 (c) 3.29.8 (d) 4.13.3

Answer key

  1. 3
  2. 3
  3. 3
  4. see today’s total
  5. Test 1
  6. a pocket-money tracker
  7. 13
  8. Hi, Zoya
  9. 12
  10. 1
  11. 54
  12. “I keep missing the bus”
  13. 49
  14. 2
  15. False
  16. an input
  17. the camera
  18. the phone is lost
  19. add it to the cart
  20. in the cloud
  21. 49
  22. on the phone
  23. a beep sound
  24. 50
  25. a named block of code
  26. your high score
  27. 18
  28. input
  29. line 2
  30. 42
  31. a bill splitter
  32. 4
  33. add a filter
  34. check the cart
  35. tab bar
  36. 270
  37. a game
  38. 13000
  39. post the photo
  40. 4.13.3

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