App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 334 · 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 does this code show?
   function greet(name) {
     return "Hi, " + name + "!";
   }
   show(greet("Riya")); (a) Riya (b) Hi, Riya! (c) greet (d) Hi, name!
2. 2.💾 What number does this code show?
   let score = 3;
   score = score - 2;
   score = score + 2;
   show(score);
3. 3.Which of these is true of an app? (a) needs no installing (b) opens from a link (c) opens in a web browser (d) updates from the store
4. 4.🧰 What does this code show?
   function greet(name) {
     return "Well done, " + name + "!";
   }
   show(greet("Meera")); (a) Well done, Meera! (b) greet (c) Well done, name! (d) Meera
5. 5.🔀 What does this sign-up rule show?
   let age = 9;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Welcome! (b) Ask a parent
6. 6.🔀 What number does this shop app show?
   let total = 510;
   if (total > 500) {
     total = total - 50;
   }
   show(total);
7. 7.Which of these is true of a final design? (a) shows where things go (b) is a quick sketch (c) has no real colours (d) shows the real fonts
8. 8.🔐 Which permission does a voice recorder really need? (a) contacts (b) the camera (c) the microphone (d) location
9. 9.🎯 Why learn about users before you build? (a) to make it longer (b) to pick a logo (c) to slow it down (d) to build what they need
10. 10.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Shop → Offers → Confirm
    Design B: Home → Cart → Pens (a) Design A (b) Design B
11. 11.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Video”
    2. open “Match report”
    3. open “Help page”
    How many times must you tap Back to reach the main screen of this tab?
12. 12.🎨 A beautiful app that confuses everyone has ___. (a) good UX but poor UI (b) good UI but poor UX (c) no UI at all (d) perfect UX
13. 13.🧪 What is the ACTUAL result of Test 2?
    🚚 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(850) → expected 0
    Test 3: delivery(650) → expected 40
14. 14.🔍 Which is the odd one out? (a) the screen layout (b) the button colours (c) the theme colours (d) how users feel after
15. 15.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Arjun", "Aman"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Riya (b) Hi, Arjun (c) Hi, Aman
16. 16.🔀 What does if / else let an app do? (a) repeat forever (b) save a photo (c) pick one of two actions (d) draw a screen
17. 17.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Add Homework
    [button] Send
    [text box] Age
    [slider] Volume
    [text box] Name
18. 18.💾 Which can hold many values in order? (a) a list (b) a switch (c) a single number (d) a button
19. 19.Which of these is a feature? (a) “What should I cook?” (b) “I keep missing the bus” (c) “I forget my homework” (d) a dark mode switch
20. 20.🧰 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(10) + fee(6));
21. 21.👆 Code that runs when an event happens is called a ___. (a) hashtag (b) handler (c) headline (d) header
22. 22.🧪 What is the actual result of a test? (a) the app’s name (b) what we hope for (c) what the app really does (d) the test’s number
23. 23.📅 An app team plans for 4 days, builds for 4 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
24. 24.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔀 In a good flow, each screen should lead to ___. (a) the same screen (b) a clear next step (c) a random page (d) a dead end
26. 26.🐞 What is a good first step when an app gives a wrong result? (a) delete the app (b) add more colours (c) find where it goes wrong (d) buy a new phone
27. 27.🧰 What does return do in a function? (a) repeats the code (b) deletes the app (c) closes the screen (d) sends back a value
28. 28.Which of these happens at the test stage? (a) pick the features (b) add the buttons (c) write down the bugs (d) sketch the screens
29. 29.🧪 Who else should try an app before release? (a) real users (b) the app icon (c) only the coder (d) nobody
30. 30.👆 The user taps the button 2 times. What number does the label show now?
    let lives = 7;
    button.onTap = function () {
      lives = lives + 3;
      label.text = lives;
    };
31. 31.🔀 What does this PIN rule show?
    let pin = "4458";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) Use 4 digits (b) PIN saved
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Start button: 52 px tall
    Cancel button: 36 px tall
    Save button: 64 px tall (a) Start (b) Save (c) Done (d) Cancel
33. 33.🧩 Scores, notes and settings that an app keeps are called ___. (a) data (b) tabs (c) buttons (d) screens
34. 34.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Address → Pens
    Design B: Home → Pens → Address → Cart → Shop (a) Design B (b) Design A
35. 35.🧩 How many buttons does this app screen have?
    [title] Sign Up
    [text box] City
    [text box] Due date
    [button] Next
    [text box] Email
    [button] Send
    [button] Start
36. 36.🔢 After an app is released, which comes LAST? (a) read user reviews (b) list what to fix (c) release an update (d) test it again
37. 37.🎯 Who are the users of an app? (a) only the testers (b) the app icons (c) only the coders (d) the people who use it
38. 38.👥 A clinic app has 195 patients, 110 doctors and 165 nurses as users. Which user group is the biggest? (a) patients (b) nurses (c) doctors
39. 39.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(24));
40. 40.🗒️ In MVP, the M stands for ___. (a) maximum (b) music (c) mobile (d) minimum

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