App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 116 · 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.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Score card”
   2. open “Score card”
   3. tap the Profile tab
   4. open “Match report”
   How many times must you tap Back to reach the main screen of this tab?
2. 2.💾 pop() takes off the last item. What does this code show?
   let friends = ["Kabir", "Zoya", "Meera"];
   friends.pop();
   show(friends[friends.length - 1]); (a) Meera (b) Kabir (c) Zoya
3. 3.🧭 Where is a tab bar usually placed in a phone app? (a) in the middle (b) inside a button (c) at the bottom (d) nowhere
4. 4.🐞 What is a bug? (a) a fast phone (b) a mistake in the code (c) a new feature (d) a nice icon
5. 5.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Match report”
   2. open “Score card”
   3. tap the Home tab
   How many times must you tap Back to reach the main screen of this tab?
6. 6.🔢 When you make an app, what comes right after “test the app”? (a) release it (b) get an idea (c) build the app (d) plan the screens
7. 7.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “wasting pocket money”?
   forgetting homework: 25 votes
   no quiet study place: 14 votes
   wasting pocket money: 19 votes
8. 8.👆 The user taps the button 5 times. What number does the label show now?
   let likes = 0;
   button.onTap = function () {
     if (likes < 4) {
       likes = likes + 1;
     }
     label.text = likes;
   };
9. 9.💡 A good app idea starts with ___. (a) many colours (b) a problem to solve (c) a cool logo (d) a long name
10. 10.🔁 What number does this code show?
    let steps = [91, 95, 74, 52, 53];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
11. 11.🔀 What is a user flow? (a) a charging cable (b) a colour theme (c) a type of font (d) the path through screens
12. 12.Which of these fits saving on the phone? (a) photos on two devices (b) a shared to-do list (c) notes to read offline (d) a class leaderboard
13. 13.💾 What number does this code show?
    let notes = ["Science", "Art"];
    notes.push("Maths");
    notes.push("Music");
    show(notes.length);
14. 14.True or false: the settings page is a screen. (a) True (b) False
15. 15.🎯 An app for “everyone” with no clear user usually ___. (a) is easy to build (b) wins every prize (c) needs no testing (d) helps nobody well
16. 16.🧪 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(18) → expected 100
    Test 2: price(11) → expected 50
    Test 3: price(13) → expected 100 (a) Test 1 (b) Test 2 (c) Test 3
17. 17.🔍 Which is the odd one out? (a) list what users need (b) talk to possible users (c) write the store text (d) spot a problem to solve
18. 18.📱 Which one comes from an app store: an app or a website? (a) an app (b) a website
19. 19.🔢 In a quiz-app flow, which comes first: “see if it is right” or “tap “Start quiz””? (a) see if it is right (b) tap “Start quiz”
20. 20.True or false: a big-text reader is the best fit for a reader who finds small print hard. (a) True (b) False
21. 21.🔢 After an app is released, what comes right after “read user reviews”? (a) list what to fix (b) test it again (c) release an update (d) fix and improve
22. 22.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
23. 23.True or false: speaking a command is an input. (a) False (b) True
24. 24.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Address → Pay
    Design B: Home → Pens → Cart → Item → Address → Shop → Menu
25. 25.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
26. 26.🔐 Which permission does a homework photo scanner really need? (a) the camera (b) contacts (c) the microphone (d) location
27. 27.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “no quiet study place”?
    forgetting homework: 19 votes
    no quiet study place: 11 votes
    losing water bottles: 17 votes
28. 28.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a wireframe (b) a final design
29. 29.🗂️ What kind of app is a cricket run chase? (a) a tool app (b) a health app (c) a game (d) a learning app
30. 30.🧰 In function tip(bill), what is bill? (a) an event (b) a loop (c) a parameter (d) a screen
31. 31.🔢 In a photo-post flow, which comes LAST? (a) add a filter (b) write a caption (c) take the photo (d) post the photo
32. 32.💾 Which works with no internet at all? (a) a cloud backup (b) a cloud leaderboard (c) a shared chat (d) data saved on the phone
33. 33.🚀 Your app is at version 4.0.5. The next release fixes a small bug. What is its version number? (a) 5.0.0 (b) 4.1.0 (c) 4.1.5 (d) 4.0.6
34. 34.📊 Survey: which problem bugs you most? How many more votes did “missing the bus” get than “wasting pocket money”?
    missing the bus: 24 votes
    forgetting homework: 13 votes
    wasting pocket money: 7 votes
35. 35.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Search tab
    2. tap the Home tab
    3. open “Video”
    Which screen are you on now? (a) Home (b) Video (c) Search (d) Profile
36. 36.🔁 What does a loop do? (a) repeats code (b) deletes code (c) draws icons (d) saves photos
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
38. 38.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a bill splitter (b) a medicine reminder (c) a study-room finder (d) a lost-and-found board
39. 39.🧰 How do you run (call) a function called greet? (a) #greet (b) run greet (c) greet[] (d) greet()
40. 40.🔔 What is a message an app shows on your lock screen called? (a) a wireframe (b) a notification (c) a variable (d) a web address

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