App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 201 · 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.🧰 What number does this code show?
   function double(n) {
     return n * 2;
   }
   show(double(20));
2. 2.🧪 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(7) → expected Pass
   Test 2: result(3) → expected Try again
   Test 3: result(5) → expected Pass (a) Test 2 (b) Test 1 (c) Test 3
3. 3.🧪 One test case fails. Which one?
   🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
   function price(age) {
     if (age <= 12) {
       return 50;
     }
     return 100;
   }
   Test 1: price(12) → expected 100
   Test 2: price(17) → expected 100
   Test 3: price(9) → expected 50 (a) Test 2 (b) Test 1 (c) Test 3
4. 4.🚀 Which version is newer: 3.1.8 or 3.1.18? (a) 3.1.8 (b) 3.1.18
5. 5.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   forgetting homework: 20 votes
   no quiet study place: 22 votes
   missing the bus: 15 votes (a) missing the bus (b) no quiet study place (c) forgetting homework
6. 6.Which of these requests asks for too much? (a) camera app → camera (b) quiz app → microphone (c) map app → location (d) calling app → contacts
7. 7.🔀 What does this battery rule show?
   let battery = 10;
   if (battery < 20) {
     show("Low battery");
   } else {
     show("Battery OK");
   } (a) Low battery (b) Battery OK
8. 8.🧭 Which part of navigation opens a list of pages? (a) the back button (b) a menu button (c) a tab bar
9. 9.👥 A cricket club app has 135 players, 235 coaches and 120 fans as users. Which user group is the biggest? (a) coaches (b) fans (c) players
10. 10.🧩 Which input is best for typing your name? (a) a text box (b) a switch (c) a picture (d) a slider
11. 11.👆 What kind of event is this: the user presses Save? (a) a load event (b) a timer event (c) a text event (d) a tap event
12. 12.♿ A screen has 11 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?
13. 13.♿ A screen has 12 icon buttons. Only 11 of them have a text label for screen readers. How many still need a label?
14. 14.🧪 What is the ACTUAL result of Test 2?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age <= 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(16) → expected 100
    Test 2: price(11) → expected 50
    Test 3: price(18) → expected 100
15. 15.🔁 In for (let i = 0; i < 3; i++), which values does i take? (a) 3 (b) 1, 2, 3 (c) 0, 1, 2, 3 (d) 0, 1, 2
16. 16.🎨 UI stands for user ___. (a) input (b) idea (c) internet (d) interface
17. 17.Which of these helps everyone use the app? (a) colour as the only clue (b) sudden loud sounds (c) tiny tap areas (d) text that can grow
18. 18.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 20;
    }
    show(fee(1) + fee(2));
19. 19.Which of these is data? (a) tap to Save (b) the home page of an app (c) your high score (d) the game-over page
20. 20.🔢 In a food-order flow, which comes first: “open the menu” or “track the order”? (a) open the menu (b) track the order
21. 21.🔁 What number does this code show?
    let scores = [13, 11, 2, 17, 10];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
22. 22.True or false: a big, easy tap area is good button design. (a) True (b) False
23. 23.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Profile tab
    2. open “Match report”
    3. tap the Profile tab
    How many times must you tap Back to reach the main screen of this tab?
24. 24.Which of these fits saving on the phone? (a) chat messages to friends (b) your last game level (c) a class leaderboard (d) photos on two devices
25. 25.True or false: an app opens in a web browser. (a) True (b) False
26. 26.🔢 In a quiz-app flow, which comes first: “tap “Start quiz”” or “see if it is right”? (a) tap “Start quiz” (b) see if it is right
27. 27.🔍 Which is the odd one out? (a) checking a password (b) sorting the scores (c) adding up a bill (d) a beep sound
28. 28.🔢 After an app is released, which comes FIRST? (a) read user reviews (b) list what to fix (c) release an update (d) test it again
29. 29.🧪 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(9) → expected Pass
    Test 2: result(4) → expected Try again
    Test 3: result(7) → expected Pass (a) Test 2 (b) Test 1 (c) Test 3
30. 30.🖼️ How many parts (boxes) does this wireframe have?
    [ title text ]
    [ top bar ]
    [ Save button ]
    [ search box ]
    [ filter buttons ]
31. 31.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) log a glass of water (b) set a reminder time (c) see today’s total (d) water animations
32. 32.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 37; // start at 37
    line 2: score = score * 3; // double it
    line 3: score = score * 2; // double it
    line 4: show(score); // show it
33. 33.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age < 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(17) → expected 100
    Test 2: price(11) → expected 50
    Test 3: price(16) → expected 100
34. 34.🧰 In function tip(bill), what is bill? (a) an event (b) a parameter (c) a screen (d) a loop
35. 35.🗒️ Version 1 of a bus tracker must be ready in 13 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 3 days
    pick your bus stop: 3 days
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 40 px tall
    Next button: 36 px tall
37. 37.🔢 In a photo-post flow, what comes right after “add a filter”? (a) open the camera screen (b) take the photo (c) post the photo (d) write a caption
38. 38.🔍 Which is the odd one out? (a) connect the data (b) sketch the screens (c) draw the user flow (d) pick the features
39. 39.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
    function price(age) {
      if (age <= 10) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(10) → expected 100
40. 40.🔍 Which is the odd one out? (a) speaking a command (b) tapping a button (c) adding up a bill (d) taking a photo

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