← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 990 · 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.True or false: the button colours is about UI (the look). (a) True (b) False
  2. 2.True or false: a homework photo scanner needs your contacts. (a) False (b) True
  3. 3.🔢 After an app is released, which comes first: “release an update” or “list what to fix”? (a) list what to fix (b) release an update
  4. 4.🔀 What does this battery rule show?
    let battery = 94;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Battery OK (b) Low battery
  5. 5.Which of these is a user need? (a) a search bar (b) “What should I cook?” (c) a dark mode switch (d) a reminder alarm
  6. 6.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 30; // start at 30
    line 2: points = points + 6; // add 6
    line 3: points = points - 2; // take away 1
    line 4: show(points); // show it
  7. 7.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) show the score (b) check the answer (c) show a question (d) confetti effects
  8. 8.🧪 What is the ACTUAL result of Test 2?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(400) → expected 40
    Test 2: delivery(750) → expected 0
    Test 3: delivery(500) → expected 0
  9. 9.🧪 What is the ACTUAL result of Test 2?
    🎟️ 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(19) → expected 100
    Test 3: price(9) → expected 50
  10. 10.True or false: a cricket run chase is a health app. (a) False (b) True
  11. 11.🐞 What is a bug? (a) a fast phone (b) a new feature (c) a nice icon (d) a mistake in the code
  12. 12.🔍 Which is the odd one out? (a) strong colour contrast (b) big touch targets (c) text that can grow (d) icons with no labels
  13. 13.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 16 px
    Caption: 11 px
    Footer: 21 px
    Menu: 10 px
  14. 14.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Kabir"));     (a) Kabir (b) Welcome, name! (c) Welcome, Kabir! (d) greet
  15. 15.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) old cases (b) edge cases (c) easy cases (d) phone cases
  16. 16.📊 Survey: which problem bugs you most? How many more votes did “wasting pocket money” get than “losing water bottles”?
    forgetting birthdays: 24 votes
    losing water bottles: 12 votes
    wasting pocket money: 14 votes
  17. 17.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age <= 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(8) → expected 100
    Test 3: price(6) → expected 50     (a) Test 3 (b) Test 2 (c) Test 1
  18. 18.True or false: a walking map needs your location. (a) False (b) True
  19. 19.🔁 What does a loop do? (a) draws icons (b) repeats code (c) deletes code (d) saves photos
  20. 20.👥 A school app has 245 students, 105 teachers and 160 parents as users. How many more students than parents are there?
  21. 21.True or false: a homework photo scanner needs the camera. (a) False (b) True
  22. 22.💾 pop() takes off the last item. What does this code show?
    let notes = ["Science", "Art", "Maths"];
    notes.pop();
    show(notes[notes.length - 1]);     (a) Art (b) Science (c) Maths
  23. 23.🔀 What does >= mean? (a) less than (b) not equal (c) smaller or equal (d) greater than or equal
  24. 24.🔀 In a good flow, each screen should lead to ___. (a) a clear next step (b) the same screen (c) a dead end (d) a random page
  25. 25.🖼️ In this wireframe (top to bottom), what is right above the tab bar?
    [ title text ]
    [ top bar ]
    [ tab bar ]
    [ menu icon ]
    [ search box ]     (a) title text (b) menu icon (c) search box (d) top bar
  26. 26.🔐 Which permission does a homework photo scanner really need? (a) the camera (b) the microphone (c) contacts (d) location
  27. 27.🔀 Which badge does this quiz app show?
    let marks = 43;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Silver (c) Bronze
  28. 28.Which of these is processing? (a) taking a photo (b) tapping a button (c) adding up a bill (d) a result on screen
  29. 29.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) on the phone (b) in the cloud
  30. 30.🔀 What does this sign-up rule show?
    let age = 11;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  31. 31.🔍 Which is the odd one out? (a) an alarm clock (b) a calculator (c) a unit converter (d) a flashcard trainer
  32. 32.🎨 Is this about UI or UX: the font size? (a) UX (b) UI
  33. 33.True or false: you write the store text at the release stage. (a) False (b) True
  34. 34.Which of these happens at the idea stage? (a) pick the features (b) draw the user flow (c) write the store text (d) list what users need
  35. 35.👆 Code that runs when an event happens is called a ___. (a) hashtag (b) headline (c) handler (d) header
  36. 36.Which of these happens at the idea stage? (a) connect the data (b) write down the bugs (c) spot a problem to solve (d) share the download link
  37. 37.🎯 Is this a user need or a feature: “Small text is hard”? (a) a user need (b) a feature
  38. 38.🔁 What number does this code show?
    let marks = [4, 1, 12, 9];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  39. 39.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Body text: 19 px
    Title: 17 px
    Label: 9 px
    Hint: 19 px
    Footer: 28 px     (a) Title (b) Label (c) Hint (d) Body text
  40. 40.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Hint: 11 px
    Footer: 16 px
    Menu: 17 px
    Title: 19 px
    Body text: 20 px     (a) Hint (b) Footer (c) Menu (d) Title

Answer key

  1. True
  2. False
  3. list what to fix
  4. Battery OK
  5. “What should I cook?”
  6. 34
  7. confetti effects
  8. 0
  9. 100
  10. False
  11. a mistake in the code
  12. icons with no labels
  13. 2
  14. Welcome, Kabir!
  15. edge cases
  16. 2
  17. Test 2
  18. True
  19. repeats code
  20. 85
  21. True
  22. Art
  23. greater than or equal
  24. a clear next step
  25. top bar
  26. the camera
  27. Bronze
  28. adding up a bill
  29. in the cloud
  30. Ask a parent
  31. a flashcard trainer
  32. UI
  33. True
  34. list what users need
  35. handler
  36. spot a problem to solve
  37. a user need
  38. 26
  39. Label
  40. Hint

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