App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 471 · 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 MVP, the M stands for ___. (a) music (b) minimum (c) mobile (d) maximum
2. 2.💾 Data saved only on the phone is lost when ___. (a) you send a message (b) the screen turns off (c) the phone is lost (d) the app is closed
3. 3.Which of these is true of a wireframe? (a) shows the real fonts (b) uses plain grey boxes (c) looks like the real app (d) has the real colours
4. 4.🔁 What is the LAST line this code shows?
   let names = ["Arjun", "Kabir", "Riya", "Meera"];
   for (let i = 0; i < names.length; i++) {
     show("Hi, " + names[i]);
   } (a) Hi, Arjun (b) Hi, Riya (c) Hi, Kabir (d) Hi, Meera
5. 5.True or false: you try every button at the idea stage. (a) True (b) False
6. 6.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Score card”
   2. tap Back
   3. open “Video”
   4. open “Score card”
   How many times must you tap Back to reach the main screen of this tab?
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Back button: 60 px tall
   Cancel button: 48 px tall
   Start button: 28 px tall (a) Back (b) Start (c) Next (d) Cancel
8. 8.True or false: the sound on/off setting fits saving on the phone. (a) True (b) False
9. 9.📊 Survey: which problem bugs you most? How many students voted in all?
   losing water bottles: 12 votes
   forgetting birthdays: 22 votes
   no quiet study place: 3 votes
10. 10.Which of these fits saving in the cloud? (a) the sound on/off setting (b) notes to read offline (c) your last game level (d) photos on two devices
11. 11.True or false: a bus tracker is the best fit for a pupil juggling five projects. (a) True (b) False
12. 12.📊 Survey: which problem bugs you most? How many more votes did “losing water bottles” get than “no quiet study place”?
    no quiet study place: 6 votes
    losing water bottles: 25 votes
    forgetting homework: 17 votes
13. 13.🧰 Why write a function? (a) to reuse code (b) to hide errors (c) to make code longer (d) to slow the app
14. 14.💾 pop() takes off the last item. What does this code show?
    let notes = ["Hindi", "Art", "Maths", "Science"];
    notes.pop();
    show(notes[notes.length - 1]); (a) Art (b) Science (c) Hindi (d) Maths
15. 15.🛠️ At which stage do you talk to possible users? (a) the build stage (b) the release stage (c) the test stage (d) the idea stage
16. 16.Which of these is true of a final design? (a) is a quick sketch (b) has no real colours (c) shows where things go (d) has the real colours
17. 17.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(39));
18. 18.🗒️ Version 1 of a bus tracker must be ready in 10 days. How many days are left for extras after the must-haves?
    see where the bus is: 4 days
    show arrival time: 3 days
    pick your bus stop: 3 days
19. 19.True or false: an app opens from a link. (a) False (b) True
20. 20.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 9 votes
    forgetting birthdays: 16 votes
    wasting pocket money: 21 votes
21. 21.🔢 In a photo-post flow, which comes first: “open the camera screen” or “take the photo”? (a) take the photo (b) open the camera screen
22. 22.👆 Code that runs when an event happens is called a ___. (a) headline (b) header (c) handler (d) hashtag
23. 23.🔀 What is a user flow? (a) a colour theme (b) a type of font (c) a charging cable (d) the path through screens
24. 24.🔢 In a sign-up flow, which comes LAST? (a) type name and email (b) see the home screen (c) make a password (d) open the app
25. 25.🧪 What is the ACTUAL result of Test 1?
    🎟️ 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(11) → expected 50
    Test 3: price(16) → expected 100
26. 26.Which of these is about UI (the look)? (a) how users feel after (b) the font size (c) how fast a task is done (d) whether users get lost
27. 27.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Offers → Shop → Search → Item → Cart → Confirm
    Design B: Home → Item → Confirm → Cart
28. 28.Which of these is data? (a) a date picker (b) tap to Start (c) your saved notes (d) the log-in page
29. 29.🧩 In an app, what is the game-over page? (a) an input (b) a button (c) a screen (d) data
30. 30.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Item → Cart
    Design B: Home → Confirm → Cart → Shop → Item → Pens → Offers
31. 31.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 800) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(800) → expected 0
    Test 2: delivery(700) → expected 40
    Test 3: delivery(950) → expected 0
32. 32.🔍 Which is the odd one out? (a) strong colour contrast (b) captions on videos (c) icons with no labels (d) labels on every icon
33. 33.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) background music (b) an avatar shop (c) check the answer (d) confetti effects
34. 34.🎯 A short made-up profile of a typical user is called a ___. (a) protocol (b) persona (c) password (d) pixel
35. 35.🎯 What is a user need? (a) a type of button (b) a phone setting (c) a problem a user has (d) a colour theme
36. 36.🔀 What number does this shop app show?
    let total = 310;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
37. 37.👥 A library app has 90 readers, 25 librarians and 45 volunteers as users. Which user group is the biggest? (a) readers (b) librarians (c) volunteers
38. 38.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) a dark mode (b) change the bus icon (c) pick your bus stop (d) rate the driver
39. 39.🔁 What number does this code show?
    let runs = [19, 10, 6, 4];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
40. 40.🛠️ At which stage do you pick the features? (a) the idea stage (b) the plan stage (c) the test stage (d) the build stage

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