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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 204 · 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: a racing challenge is a game. (a) True (b) False
  2. 2.🔀 Which badge does this quiz app show?
    let marks = 34;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze
  3. 3.Which of these is an output? (a) speaking a command (b) sorting the scores (c) working out a tip (d) a pop-up message
  4. 4.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) makes it harder (b) helps everyone
  5. 5.🧪 One test case fails. Which one?
    🎟️ 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(11) → expected 100
    Test 2: price(15) → expected 100
    Test 3: price(9) → expected 50     (a) Test 2 (b) Test 1 (c) Test 3
  6. 6.🔍 Which is the odd one out? (a) a spelling coach (b) a water reminder (c) a step counter (d) a sleep tracker
  7. 7.True or false: an app that just says hi solves a real problem. (a) True (b) False
  8. 8.True or false: “tiny tap areas” helps everyone use the app. (a) True (b) False
  9. 9.🔢 When you make an app, which comes first: “test the app” or “build the app”? (a) build the app (b) test the app
  10. 10.🔢 In a sign-up flow, what comes right after “type name and email”? (a) enter the code sent (b) see the home screen (c) make a password (d) open the app
  11. 11.True or false: a wireframe has no real colours. (a) False (b) True
  12. 12.Which of these is true of a website? (a) has a home-screen icon (b) is installed on a phone (c) updates from the store (d) opens in a web browser
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 40 px tall
    Help button: 32 px tall
  14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  15. 15.📱 Which one updates from the store: an app or a website? (a) an app (b) a website
  16. 16.💾 What number does this code show?
    let songs = ["Rain", "Stars"];
    songs.push("Ocean");
    show(songs.length);
  17. 17.🗒️ Version 1 of a homework planner must be ready in 15 days. How many days are left for extras after the must-haves?
    add a homework task: 3 days
    set a due date: 4 days
    see tasks by day: 2 days
  18. 18.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(9));
  19. 19.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Profile tab
    2. open “Match report”
    3. open “Badges”
    4. tap Back
    How many times must you tap Back to reach the main screen of this tab?
  20. 20.🔢 In a sign-up flow, which comes LAST? (a) enter the code sent (b) see the home screen (c) tap “Sign up” (d) type name and email
  21. 21.📅 An app team plans for 2 days, builds for 9 days, tests for 1 days and releases on 1 more day. How many days does the whole project take?
  22. 22.🧰 In function tip(bill), what is bill? (a) an event (b) a screen (c) a loop (d) a parameter
  23. 23.🔀 What does this battery rule show?
    let battery = 30;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  24. 24.🔀 What does if / else let an app do? (a) draw a screen (b) repeat forever (c) pick one of two actions (d) save a photo
  25. 25.True or false: a website is installed on a phone. (a) True (b) False
  26. 26.🚀 Which version is newer: 1.3.3 or 1.13.3? (a) 1.13.3 (b) 1.3.3
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Help button: 64 px tall
    Send button: 36 px tall
    Save button: 36 px tall
  28. 28.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Meera", "Aman", "Zoya", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Riya (b) Hi, Meera (c) Hi, Arjun (d) Hi, Aman
  29. 29.True or false: notes to read offline fits saving on the phone. (a) True (b) False
  30. 30.🚀 A privacy policy tells users ___. (a) the app’s price (b) what data is collected (c) the app’s colours (d) the screen size
  31. 31.True or false: the screen first opens is a timer event. (a) False (b) True
  32. 32.Which of these app ideas solves no real problem? (a) a bill splitter (b) a free study-room finder (c) a lost-and-found board (d) a button with no action
  33. 33.🔢 In a food-order flow, which comes first: “track the order” or “pay for the order”? (a) track the order (b) pay for the order
  34. 34.🔁 What number does this code show?
    let steps = [48, 35, 36, 52, 45];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
  35. 35.👥 A library app has 230 readers, 115 librarians and 155 volunteers as users. How many users does it have in all?
  36. 36.🚀 Which of these versions is the NEWEST?
    1.5.4, 1.16.1, 1.13.5, 0.30.8     (a) 1.5.4 (b) 0.30.8 (c) 1.13.5 (d) 1.16.1
  37. 37.🗒️ Version 1 of a quiz app must be ready in 13 days. How many days are left for extras after the must-haves?
    show a question: 4 days
    check the answer: 4 days
    show the score: 4 days
  38. 38.🔀 What does this battery rule show?
    let battery = 72;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  39. 39.💾 What number does this code show?
    let points = 9;
    points = points - 6;
    points = points + 4;
    show(points);
  40. 40.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);

Answer key

  1. True
  2. Bronze
  3. a pop-up message
  4. helps everyone
  5. Test 1
  6. a spelling coach
  7. False
  8. False
  9. build the app
  10. make a password
  11. True
  12. opens in a web browser
  13. 1
  14. line 2
  15. an app
  16. 3
  17. 6
  18. 27
  19. 1
  20. see the home screen
  21. 13
  22. a parameter
  23. Battery OK
  24. pick one of two actions
  25. False
  26. 1.13.3
  27. 1
  28. Hi, Arjun
  29. True
  30. what data is collected
  31. False
  32. a button with no action
  33. pay for the order
  34. 1
  35. 500
  36. 1.16.1
  37. 1
  38. Battery OK
  39. 7
  40. 60

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