App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 364 · 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 kind of app is a flashcard trainer? (a) a game (b) a tool app (c) a learning app (d) a health app
2. 2.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 590; // typed by the user
   line 2: let off = 30; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 2 (b) line 4 (c) line 3 (d) line 1
3. 3.🛠️ At which stage do you write the store text? (a) the test stage (b) the build stage (c) the idea stage (d) the release stage
4. 4.True or false: your friends list is a screen. (a) False (b) True
5. 5.🚀 Your app is at version 1.5.7. The next release adds a new feature. What is its version number? (a) 2.0.0 (b) 1.6.7 (c) 1.6.0 (d) 1.5.8
6. 6.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) background music (b) an avatar shop (c) confetti effects (d) check the answer
7. 7.🎯 What is the best first step to learn what users need? (a) guess on your own (b) pick the colours (c) write the code (d) ask and watch users
8. 8.💡 An app that tries to do everything at once is usually ___. (a) very small (b) easy to build (c) finished fast (d) hard to use
9. 9.🔀 What does this sign-up rule show?
   let age = 12;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Welcome! (b) Ask a parent
10. 10.🔀 A screen with no way forward or back is called a ___. (a) dead end (b) shortcut (c) home screen (d) tab bar
11. 11.👥 A cricket club app has 65 players, 205 coaches and 20 fans as users. Which user group is the biggest? (a) fans (b) players (c) coaches
12. 12.🔢 When you make an app, which comes first: “plan the screens” or “get an idea”? (a) plan the screens (b) get an idea
13. 13.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting homework: 11 votes
    losing water bottles: 20 votes
    no quiet study place: 3 votes (a) no quiet study place (b) losing water bottles (c) forgetting homework
14. 14.📱 Which one has a home-screen icon: an app or a website? (a) a website (b) an app
15. 15.👆 What kind of event is this: the screen first opens? (a) a text event (b) a timer event (c) a load event (d) a tap event
16. 16.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) phone cases (b) old cases (c) edge cases (d) easy cases
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
18. 18.🔐 Which permission does a birthday list of friends really need? (a) location (b) the camera (c) the microphone (d) contacts
19. 19.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Arjun")); (a) Welcome, Arjun! (b) Arjun (c) greet (d) Welcome, name!
20. 20.🧩 In an app, what is tap to Save? (a) an input (b) a button (c) data (d) a screen
21. 21.True or false: a unit converter is a tool app. (a) True (b) False
22. 22.Which of these is a feature? (a) a share button (b) “I forget my homework” (c) “What should I cook?” (d) “I keep missing the bus”
23. 23.🚀 Your app is at version 3.10.8. The next release fixes a small bug. What is its version number? (a) 4.0.0 (b) 3.11.8 (c) 3.10.9 (d) 3.11.0
24. 24.📴 Which of these can often still work with no internet? (a) an installed app (b) a video call (c) a new website (d) an online search
25. 25.Which of these is an input? (a) a result on screen (b) taking a photo (c) sorting the scores (d) a pop-up message
26. 26.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 44; // start at 44
    line 2: score = score + 5; // add 4
    line 3: score = score - 1; // take away 1
    line 4: show(score); // show it
27. 27.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
28. 28.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Match report”
    2. tap the Quiz tab
    3. open “Match report”
    4. tap the Lessons tab
    How many times must you tap Back to reach the main screen of this tab?
29. 29.🔁 What number does this code show?
    let scores = [7, 4, 9];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);
30. 30.🔀 What does if / else let an app do? (a) pick one of two actions (b) save a photo (c) repeat forever (d) draw a screen
31. 31.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a homework planner (b) a bill splitter (c) a medicine reminder (d) a study-room finder
32. 32.🔀 What does this PIN rule show?
    let pin = "6515";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) PIN saved (b) Use 4 digits
33. 33.👥 A clinic app has 45 patients, 120 doctors and 100 nurses as users. Which user group is the biggest? (a) patients (b) doctors (c) nurses
34. 34.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [button] Done
    [switch] Remind me
    [button] Back
    [button] Save
    [text box] Name
    [slider] Brightness (a) Brightness (b) Remind me (c) Save (d) Name
35. 35.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Friend list”
    2. open “Badges”
    3. tap Back
    How many times must you tap Back to reach the main screen of this tab?
36. 36.🔀 What does this battery rule show?
    let battery = 90;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
37. 37.🖼️ How many parts (boxes) does this wireframe have?
    [ top bar ]
    [ Save button ]
    [ Add button ]
    [ menu icon ]
38. 38.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 34; // start at 34
    line 2: coins = coins + 3; // add 3
    line 3: coins = coins * 3; // double it
    line 4: show(coins); // show it
39. 39.🔀 What does this battery rule show?
    let battery = 47;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
40. 40.💾 What number does this code show?
    let notes = ["Music", "Maths", "Hindi"];
    notes.push("Art");
    show(notes.length);

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