App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 416 · 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.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) share your streak (b) water animations (c) custom alert sounds (d) set a reminder time
2. 2.🧩 How many buttons does this app screen have?
   [title] New Note
   [text box] Name
   [button] Help
   [switch] Show hints
   [button] Send
   [text box] Notes
   [slider] Text size
   [button] Next
3. 3.🧰 In function tip(bill), what is bill? (a) a screen (b) a parameter (c) an event (d) a loop
4. 4.✏️ Why draw a wireframe before coding? (a) it saves data (b) changes are quick (c) it adds colours (d) it runs the app
5. 5.🧰 What number does this code show?
   function points(stars) {
     return stars * 10 + 5;
   }
   show(points(3) + points(1));
6. 6.Which of these app ideas solves a real problem? (a) an app that just says hi (b) a page of random dots (c) a library due-date alert (d) a blank grey screen
7. 7.True or false: a speak-to-type notes app needs the microphone. (a) True (b) False
8. 8.🧩 Which of these is a button on this screen?
   [title] Add Homework
   [button] Start
   [text box] Notes (a) Start (b) Notes
9. 9.🔢 In a photo-post flow, what comes right after “open the camera screen”? (a) write a caption (b) take the photo (c) post the photo (d) add a filter
10. 10.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) working out a tip (d) adding up a bill
11. 11.Which of these is data? (a) the settings page (b) tap to Start (c) the game-over page (d) your saved notes
12. 12.🔀 Which badge does this quiz app show?
    let marks = 32;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Gold (b) Silver (c) Bronze
13. 13.💾 What number does this code show?
    let notes = ["Music", "Maths"];
    notes.push("Science");
    show(notes.length);
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 4 (b) line 1 (c) line 2 (d) line 3
15. 15.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) dark blue on white (d) black on pale grey
16. 16.Which of these fits saving in the cloud? (a) your last game level (b) the sound on/off setting (c) photos on two devices (d) a draft you are typing
17. 17.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) show arrival time (b) pick your bus stop (c) see where the bus is (d) change the bus icon
18. 18.🔍 Which is the odd one out? (a) fast-flashing lights (b) icons with no labels (c) captions on videos (d) colour as the only clue
19. 19.🧩 In an app, what is tap to Send? (a) a button (b) data (c) an input (d) a screen
20. 20.💾 Which works with no internet at all? (a) data saved on the phone (b) a shared chat (c) a cloud backup (d) a cloud leaderboard
21. 21.True or false: a website has a home-screen icon. (a) False (b) True
22. 22.True or false: a bus tracker is the best fit for a parent waiting at the bus stop. (a) True (b) False
23. 23.💾 What number does this code show?
    let notes = ["Sports", "Science"];
    notes.push("Hindi");
    show(notes.length);
24. 24.🔁 What number does this code show?
    let steps = [16, 41, 81, 39, 25];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
25. 25.🗒️ Version 1 of a water reminder must be ready in 9 days. How many days are left for extras after the must-haves?
    set a reminder time: 1 days
    log a glass of water: 3 days
    see today’s total: 5 days
26. 26.🔢 When you make an app, which comes first: “get an idea” or “test the app”? (a) test the app (b) get an idea
27. 27.Which of these is about UI (the look)? (a) whether users get lost (b) how many taps it takes (c) how easy sign-up is (d) the icon shapes
28. 28.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. open “Badges”
    3. open “Video”
    Which screen are you on now? (a) Score card (b) Home (c) Badges (d) Video
29. 29.Which of these is an input? (a) a result on screen (b) tapping a button (c) adding up a bill (d) working out a tip
30. 30.⚙️ What number does this app show?
    let price = 300; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
31. 31.Which of these happens at the test stage? (a) sketch the screens (b) spot a problem to solve (c) try every button (d) write the code
32. 32.💾 What number does this code show?
    let songs = ["Stars", "Ocean"];
    songs.push("Kites");
    songs.push("Monsoon");
    show(songs.length);
33. 33.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on pale grey (d) yellow on white
34. 34.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] New Note
    [text box] Notes
    [button] Send
    [slider] Volume
35. 35.🧰 How do you run (call) a function called greet? (a) greet[] (b) run greet (c) #greet (d) greet()
36. 36.Which of these is true of the back button? (a) shows 3 to 5 icons (b) sits at the bottom (c) goes to the last screen (d) switches main sections
37. 37.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 33; // start at 32
    line 2: coins = coins * 2; // double it
    line 3: coins = coins * 2; // double it
    line 4: show(coins); // show it
38. 38.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 33; // start at 33
    line 2: score = score - 4; // add 4
    line 3: score = score + 3; // add 3
    line 4: score = score * 2; // double it
    line 5: show(score); // show it (a) line 2 (b) line 3 (c) line 1 (d) line 4
39. 39.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) rate the driver (b) show arrival time (c) pick your bus stop (d) see where the bus is
40. 40.📱 Which one comes from an app store: an app or a website? (a) an app (b) a website

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