App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 885 · 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 a photo-post flow, which comes FIRST? (a) write a caption (b) take the photo (c) add a filter (d) open the camera screen
2. 2.Which of these happens at the release stage? (a) pick the features (b) connect the data (c) sketch the screens (d) write the store text
3. 3.💡 Which app idea solves this problem: the library is always full? (a) a medicine reminder (b) a homework planner (c) a lost-and-found board (d) a study-room finder
4. 4.🔢 When you make an app, which comes first: “release it” or “plan the screens”? (a) plan the screens (b) release it
5. 5.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let lives = 30; // start at 30
   line 2: lives = lives + 4; // add 4
   line 3: lives = lives - 3; // add 3
   line 4: show(lives); // show it
6. 6.Which of these is data? (a) a slider for volume (b) the home page of an app (c) the log-in page (d) your saved notes
7. 7.Which of these is true of a wireframe? (a) has the real colours (b) uses plain grey boxes (c) shows the real fonts (d) looks like the real app
8. 8.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let points = 48; // start at 48
   line 2: points = points - 4; // take away 1
   line 3: points = points + 5; // add 5
   line 4: show(points); // show it (a) line 2 (b) line 1 (c) line 3
9. 9.Which of these fits saving in the cloud? (a) the sound on/off setting (b) a draft you are typing (c) your last game level (d) chat messages to friends
10. 10.🔀 What does this sign-up rule show?
    let age = 15;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
11. 11.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “forgetting homework”?
    losing water bottles: 14 votes
    no quiet study place: 8 votes
    forgetting homework: 5 votes
12. 12.♿ What does a screen reader do? (a) takes photos (b) plays music (c) reads the screen aloud (d) makes text tiny
13. 13.🔍 Which is the odd one out? (a) write the store text (b) put it on an app store (c) share the download link (d) talk to possible users
14. 14.💡 Which is a problem statement? (a) “Use blue buttons” (b) “Make it fast” (c) “Add a logo” (d) “Kids forget homework”
15. 15.🔀 What does this PIN rule show?
    let pin = "520";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) Use 4 digits (b) PIN saved
16. 16.Which of these is about UI (the look)? (a) how fast a task is done (b) the font size (c) how many taps it takes (d) how users feel after
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Done button: 52 px tall
    Cancel button: 52 px tall (a) Back (b) Cancel (c) Done
18. 18.Which of these is a screen? (a) your saved notes (b) tap to go Next (c) a switch for dark mode (d) the settings page
19. 19.Which of these makes the app harder to use? (a) fast-flashing lights (b) big touch targets (c) text that can grow (d) labels on every icon
20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 290; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 4 (b) line 2 (c) line 1 (d) line 3
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 25; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 3 (b) line 2 (c) line 1 (d) line 4
22. 22.🔀 What is a user flow? (a) a type of font (b) a colour theme (c) a charging cable (d) the path through screens
23. 23.💾 What number does this code show?
    let notes = ["Sports", "Art"];
    notes.push("Hindi");
    notes.push("Maths");
    show(notes.length);
24. 24.🌗 Is yellow on white 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) a random page (b) the same screen (c) a clear next step (d) a dead end
26. 26.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Kabir", "Arjun", "Zoya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Kabir (b) Hi, Zoya (c) Hi, Arjun (d) Hi, Aman
27. 27.🔀 With if / else if / else, how many parts run? (a) all of them (b) two (c) only one (d) none
28. 28.Which of these is about UX (the experience)? (a) the button colours (b) how fast a task is done (c) the theme colours (d) the icon shapes
29. 29.🔀 Why plan the user flow before building? (a) to skip testing (b) so each step is clear (c) to hide the buttons (d) to add more taps
30. 30.💾 What number does this code show?
    let friends = ["Meera", "Zoya"];
    friends.push("Aman");
    friends.push("Arjun");
    show(friends.length);
31. 31.✏️ What is the easiest way to draw a first wireframe? (a) pencil and paper (b) a phone case (c) a microphone (d) a 3D printer
32. 32.🧩 Scores, notes and settings that an app keeps are called ___. (a) data (b) buttons (c) tabs (d) screens
33. 33.🖼️ In this wireframe (top to bottom), what is right below the list of items?
    [ menu icon ]
    [ tab bar ]
    [ list of items ]
    [ title text ] (a) tab bar (b) menu icon (c) title text
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
35. 35.🧩 Which input is best for typing your name? (a) a text box (b) a slider (c) a switch (d) a picture
36. 36.True or false: “text that can grow” makes the app harder to use. (a) True (b) False
37. 37.🖼️ How many parts (boxes) does this wireframe have?
    [ filter buttons ]
    [ tab bar ]
    [ search box ]
    [ top bar ]
38. 38.🧰 Why write a function? (a) to reuse code (b) to hide errors (c) to slow the app (d) to make code longer
39. 39.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) on the phone (b) in the cloud
40. 40.🖼️ How many parts (boxes) does this wireframe have?
    [ list of items ]
    [ search box ]
    [ Save button ]
    [ tab bar ]
    [ top bar ]
    [ Add button ]

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