App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 160 · 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.🔀 Which badge does this quiz app show?
   let marks = 85;
   if (marks >= 80) {
     show("Gold");
   } else if (marks >= 50) {
     show("Silver");
   } else {
     show("Bronze");
   } (a) Gold (b) Bronze (c) Silver
2. 2.True or false: the sound on/off setting fits saving in the cloud. (a) False (b) True
3. 3.Which of these is a user need? (a) a dark mode switch (b) a reminder alarm (c) “What should I cook?” (d) a share button
4. 4.📱 Which one has a home-screen icon: an app or a website? (a) an app (b) a website
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 40 px tall
   Save button: 60 px tall
   Cancel button: 40 px tall
6. 6.📱 Which one has a web address: an app or a website? (a) an app (b) a website
7. 7.🗒️ What is a must-have feature? (a) a nice extra (b) a colour theme (c) a sound effect (d) one the app cannot skip
8. 8.Which of these requests is fair? (a) timer → your photos (b) quiz app → microphone (c) torch → contacts (d) voice notes → microphone
9. 9.True or false: an app that just says hi solves no real problem. (a) True (b) False
10. 10.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) set a reminder time (b) custom alert sounds (c) see today’s total (d) log a glass of water
11. 11.Which of these is true of a website? (a) updates from the store (b) comes from an app store (c) opens in a web browser (d) has a home-screen icon
12. 12.🔀 What does this battery rule show?
    let battery = 68;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 5; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 3 (b) line 1 (c) line 4 (d) line 2
14. 14.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) pick your bus stop (c) show arrival time (d) change the bus icon
15. 15.♿ Does this help everyone, or make the app harder to use: icons with no labels? (a) helps everyone (b) makes it harder
16. 16.🗒️ In MVP, the M stands for ___. (a) music (b) maximum (c) mobile (d) minimum
17. 17.True or false: a selfie sticker app needs your contacts. (a) False (b) True
18. 18.Which of these fits saving in the cloud? (a) the sound on/off setting (b) your last game level (c) a shared to-do list (d) a draft you are typing
19. 19.💡 Which app idea solves this problem: friends argue over who pays? (a) a homework planner (b) a bill splitter (c) a study-room finder (d) a medicine reminder
20. 20.True or false: an app is installed on a phone. (a) False (b) True
21. 21.🗒️ Why keep version 1 small? (a) to look bigger (b) to learn from users soon (c) to use up storage (d) to confuse users
22. 22.🔐 Which permission does a selfie sticker app really need? (a) location (b) the camera (c) the microphone (d) contacts
23. 23.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 46; // start at 46
    line 2: lives = lives - 5; // take away 5
    line 3: lives = lives + 4; // add 4
    line 4: lives = lives - 3; // add 3
    line 5: show(lives); // show it (a) line 2 (b) line 3 (c) line 4 (d) line 1
24. 24.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
25. 25.🔢 When you make an app, which comes LAST? (a) release it (b) get an idea (c) plan the screens (d) build the app
26. 26.Which of these app ideas solves a real problem? (a) a blank grey screen (b) a page of random dots (c) a library due-date alert (d) an app that just says hi
27. 27.True or false: buttons almost touching is poor button design. (a) False (b) True
28. 28.💾 In most code, the first item of a list is at position ___. (a) 2 (b) 0 (c) 1 (d) 10
29. 29.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(21));
30. 30.🧭 Which part of navigation switches main sections? (a) a menu button (b) a tab bar (c) the back button
31. 31.Which of these requests is fair? (a) timer → your photos (b) torch → contacts (c) calculator → location (d) map app → location
32. 32.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
33. 33.🧩 In an app, what is today’s step count? (a) a button (b) data (c) an input (d) a screen
34. 34.True or false: a wireframe has no real colours. (a) True (b) False
35. 35.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 12 px
    Title: 24 px
    Caption: 18 px
    Body text: 16 px (a) Body text (b) Footer (c) Caption (d) Title
36. 36.🐞 What is a bug? (a) a mistake in the code (b) a fast phone (c) a nice icon (d) a new feature
37. 37.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting birthdays: 23 votes
    wasting pocket money: 22 votes
    no quiet study place: 18 votes (a) forgetting birthdays (b) wasting pocket money (c) no quiet study place
38. 38.Which of these app ideas solves a real problem? (a) a blank grey screen (b) a page of random dots (c) a bill splitter (d) an app that just says hi
39. 39.🧰 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(7) + fee(5));
40. 40.🔍 Which is the odd one out? (a) list what users need (b) add the buttons (c) spot a problem to solve (d) talk to possible users

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students