← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 867 · 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.🎯 Which app would help this user most: a parent waiting at the bus stop? (a) a bus tracker (b) a water reminder (c) a big-text reader (d) a recipe finder
  2. 2.🧩 In an app, what is a date picker? (a) an input (b) a screen (c) a button (d) data
  3. 3.Which of these is a screen? (a) the log-in page (b) tap to go Next (c) a switch for dark mode (d) a slider for volume
  4. 4.True or false: a medicine reminder solves no real problem. (a) True (b) False
  5. 5.True or false: you talk to possible users at the release stage. (a) True (b) False
  6. 6.🧩 Scores, notes and settings that an app keeps are called ___. (a) tabs (b) data (c) screens (d) buttons
  7. 7.🧪 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(13) → expected 100
    Test 2: price(18) → expected 100
    Test 3: price(10) → expected 50     (a) Test 2 (b) Test 1 (c) Test 3
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  9. 9.🧪 How many of these test cases pass?
    📝 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(9) → expected Pass
    Test 2: result(6) → expected Try again
    Test 3: result(8) → expected Pass
  10. 10.🎯 Who are the users of an app? (a) only the coders (b) only the testers (c) the app icons (d) the people who use it
  11. 11.True or false: the button colours is about UI (the look). (a) False (b) True
  12. 12.🔢 In a sign-up flow, what comes right after “make a password”? (a) type name and email (b) see the home screen (c) open the app (d) enter the code sent
  13. 13.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age <= 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(9) → expected 100
    Test 3: price(6) → expected 50
  14. 14.👆 The user taps the button 4 times. What number does the label show now?
    let coins = 2;
    button.onTap = function () {
      coins = coins + 2;
      label.text = coins;
    };
  15. 15.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) pick your bus stop (c) a dark mode (d) show arrival time
  16. 16.True or false: a wireframe has the real colours. (a) True (b) False
  17. 17.Which of these is true of a tab bar? (a) opens a list of pages (b) goes to the last screen (c) undoes one move (d) switches main sections
  18. 18.Which of these requests asks for too much? (a) camera app → camera (b) calling app → contacts (c) timer → your photos (d) map app → location
  19. 19.🔀 What does this sign-up rule show?
    let age = 15;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  20. 20.🔢 After an app is released, what comes right after “list what to fix”? (a) release an update (b) fix and improve (c) test it again (d) read user reviews
  21. 21.🧰 How do you run (call) a function called greet? (a) greet[] (b) run greet (c) greet() (d) #greet
  22. 22.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(5));
  23. 23.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Search tab
    2. open “Edit photo”
    3. open “Badges”
    4. tap the Profile tab
    Which screen are you on now?     (a) Badges (b) Profile (c) Home (d) Edit photo
  24. 24.👥 A cricket club app has 85 players, 235 coaches and 185 fans as users. How many users does it have in all?
  25. 25.🔢 After an app is released, what comes right after “test it again”? (a) read user reviews (b) fix and improve (c) list what to fix (d) release an update
  26. 26.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Search → Cart → Shop → Address → Results
    Design B: Home → Shop → Item → Menu
  27. 27.🗒️ The first small, working version of an app is often called an ___. (a) MVP (b) FAQ (c) URL (d) CPU
  28. 28.🧭 Tapping a tab usually takes you to ___. (a) the phone settings (b) a random page (c) the last app used (d) that tab’s main screen
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  30. 30.✏️ Why draw a wireframe before coding? (a) it adds colours (b) changes are quick (c) it saves data (d) it runs the app
  31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔁 What number does this code show?
    let runs = [30, 17, 19, 77];
    let count = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] >= 40) {
        count = count + 1;
      }
    }
    show(count);
  33. 33.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Badges”
    2. tap the Search tab
    3. tap the Search tab
    4. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?
  34. 34.🧪 Who else should try an app before release? (a) the app icon (b) only the coder (c) nobody (d) real users
  35. 35.Which of these is an input? (a) working out a tip (b) sorting the scores (c) adding up a bill (d) speaking a command
  36. 36.📱 Where do people usually download phone apps from? (a) an app store (b) a charger (c) a printer (d) a web server
  37. 37.🔀 What number does this shop app show?
    let total = 850;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  38. 38.🔢 In a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) enter the code sent (c) see the home screen (d) open the app
  39. 39.🔁 What number does this code show?
    let marks = [20, 15, 7, 18];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design

Answer key

  1. a bus tracker
  2. an input
  3. the log-in page
  4. False
  5. False
  6. data
  7. Test 1
  8. 24
  9. 3
  10. the people who use it
  11. True
  12. enter the code sent
  13. 2
  14. 10
  15. a dark mode
  16. False
  17. switches main sections
  18. timer → your photos
  19. Welcome!
  20. fix and improve
  21. greet()
  22. 15
  23. Profile
  24. 505
  25. release an update
  26. 3
  27. MVP
  28. that tab’s main screen
  29. 24
  30. changes are quick
  31. easy to read
  32. 1
  33. 1
  34. real users
  35. speaking a command
  36. an app store
  37. 800
  38. open the app
  39. 60
  40. good design

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