App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 56 · 40 questions

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.

1. 1.🧩 In an app, what is tap to go Next? (a) a screen (b) an input (c) a button (d) data
2. 2.💾 pop() takes off the last item. What does this code show?
   let friends = ["Riya", "Zoya", "Arjun"];
   friends.pop();
   show(friends[friends.length - 1]); (a) Riya (b) Arjun (c) Zoya
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) yellow on white (d) black on yellow
4. 4.🧪 How many of these test cases pass?
   🎟️ 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(12) → expected 100
   Test 2: price(6) → expected 50
   Test 3: price(11) → expected 100
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 40 px tall
   Save button: 64 px tall
   Send button: 68 px tall (a) Back (b) Send (c) Save
6. 6.💡 Which app idea solves this problem: bottles go missing at school? (a) a lost-and-found board (b) a bill splitter (c) a medicine reminder (d) a study-room finder
7. 7.Which of these app ideas solves no real problem? (a) a lost-and-found board (b) a medicine reminder (c) a bill splitter (d) a page of random dots
8. 8.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) speaking a command (d) a buzz (vibration)
9. 9.🧰 In function tip(bill), what is bill? (a) an event (b) a parameter (c) a loop (d) a screen
10. 10.💡 Which app idea solves this problem: a patient misses doses? (a) a medicine reminder (b) a bill splitter (c) a study-room finder (d) a homework planner
11. 11.🔢 In a food-order flow, which comes first: “open the menu” or “check the cart”? (a) check the cart (b) open the menu
12. 12.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
13. 13.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on dark green (d) dark blue on white
14. 14.👥 A cricket club app has 195 players, 225 coaches and 125 fans as users. Which user group is the biggest? (a) players (b) coaches (c) fans
15. 15.♿ Accessibility means an app works for ___. (a) only experts (b) only the coder (c) everyone (d) nobody
16. 16.Which of these is processing? (a) speaking a command (b) adding up a bill (c) a beep sound (d) taking a photo
17. 17.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(5) → expected Pass
    Test 2: result(6) → expected Pass
    Test 3: result(4) → expected Try again (a) Test 2 (b) Test 3 (c) Test 1
18. 18.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
19. 19.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 42; // start at 42
    line 2: coins = coins + 2; // double it
    line 3: coins = coins - 4; // take away 4
    line 4: coins = coins + 3; // add 3
    line 5: show(coins); // show it
20. 20.🔍 Which is the odd one out? (a) a puzzle with levels (b) a cricket run chase (c) a word battle (d) a times-table quiz
21. 21.🔍 Which is the odd one out? (a) a word battle (b) a water reminder (c) a sleep tracker (d) a step counter
22. 22.Which of these is an output? (a) tapping a button (b) a beep sound (c) speaking a command (d) working out a tip
23. 23.👥 A cricket club app has 290 players, 130 coaches and 110 fans as users. How many more players than fans are there?
24. 24.🧩 Which of these is a button on this screen?
    [title] Edit Profile
    [slider] Volume
    [switch] Show hints
    [button] Cancel
    [text box] Phone
    [text box] Email
    [text box] Notes (a) Phone (b) Notes (c) Email (d) Cancel
25. 25.♿ What does a screen reader do? (a) plays music (b) makes text tiny (c) reads the screen aloud (d) takes photos
26. 26.🔁 What number does this code show?
    let runs = [1, 10, 13, 6, 10];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
27. 27.📱 Which one opens from a link: an app or a website? (a) an app (b) a website
28. 28.🔁 Why use a loop to show 100 messages? (a) it is slower (b) it hides them (c) less code to write (d) it uses more lines
29. 29.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. tap the Lessons tab
    3. open “Friend list”
    4. tap Back
    5. open “Score card”
    Which screen are you on now? (a) Lessons (b) Quiz (c) Friend list (d) Score card
30. 30.✏️ What is a wireframe? (a) a simple screen sketch (b) the finished app (c) a type of password (d) a charging cable
31. 31.🚀 Your app is at version 2.10.3. The next release is a big redesign that changes how the app works. What is its version number? (a) 3.0.0 (b) 2.10.4 (c) 2.11.3 (d) 2.11.0
32. 32.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 35; // start at 35
    line 2: stars = stars * 2; // double it
    line 3: stars = stars + 5; // add 2
    line 4: stars = stars * 2; // double it
    line 5: show(stars); // show it (a) line 2 (b) line 4 (c) line 3 (d) line 1
33. 33.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(26));
34. 34.True or false: a finger hits Like is a load event. (a) True (b) False
35. 35.🔐 Is this permission request fair or too much: calculator → location? (a) too much (b) fair
36. 36.🚀 A privacy policy tells users ___. (a) what data is collected (b) the screen size (c) the app’s price (d) the app’s colours
37. 37.Which of these is true of a website? (a) updates from the store (b) has a home-screen icon (c) is installed on a phone (d) opens in a web browser
38. 38.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 33; // start at 33
    line 2: lives = lives + 4; // add 4
    line 3: lives = lives - 5; // take away 3
    line 4: show(lives); // show it
39. 39.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let stars = 31; // start at 31
    line 2: stars = stars + 2; // double it
    line 3: stars = stars - 5; // take away 5
    line 4: stars = stars - 1; // take away 1
    line 5: show(stars); // show it
40. 40.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(5));

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