App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 671 · 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.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let lives = 47; // start at 47
   line 2: lives = lives - 3; // take away 3
   line 3: lives = lives + 5; // take away 5
   line 4: show(lives); // show it (a) line 3 (b) line 2 (c) line 1
2. 2.👥 A clinic app has 170 patients, 120 doctors and 50 nurses as users. How many users does it have in all?
3. 3.📅 An app team plans for 2 days, builds for 10 days, tests for 3 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
4. 4.🧭 Why should every screen show where you are? (a) to look busy (b) to hide the menu (c) so users do not get lost (d) to use more battery
5. 5.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a wireframe (b) a final design
6. 6.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
7. 7.🧭 About how many tabs suit a tab bar best? (a) 10 to 12 (b) 3 to 5 (c) 1 (d) 20
8. 8.🗒️ Version 1 of a quiz app must be ready in 13 days. How many days are left for extras after the must-haves?
   show a question: 2 days
   check the answer: 3 days
   show the score: 5 days
9. 9.💡 Does an app idea like a medicine reminder solve a real problem? (a) Yes (b) No
10. 10.🗒️ What is a must-have feature? (a) a sound effect (b) one the app cannot skip (c) a colour theme (d) a nice extra
11. 11.♿ A screen has 8 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
12. 12.🧩 What do we call one full page of an app? (a) a screen (b) a variable (c) a cable (d) a battery
13. 13.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Results → Shop
    Design B: Home → Pens → Shop → Offers
14. 14.🔢 In a quiz-app flow, which comes LAST? (a) tap “Start quiz” (b) pick an answer (c) read a question (d) see the final score
15. 15.👥 A cricket club app has 175 players, 260 coaches and 200 fans as users. Which user group is the biggest? (a) coaches (b) fans (c) players
16. 16.🗒️ Version 1 of a bus tracker must be ready in 13 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 1 days
    pick your bus stop: 5 days
17. 17.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 600 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 600) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(850) → expected 0
    Test 2: delivery(550) → expected 40
    Test 3: delivery(600) → expected 0 (a) Test 1 (b) Test 2 (c) Test 3
18. 18.True or false: a website opens from a link. (a) False (b) True
19. 19.True or false: a library due-date alert solves a real problem. (a) True (b) False
20. 20.🔐 A torch app asks for your contacts. What should you do? (a) share them all (b) allow it (c) post them online (d) deny it
21. 21.True or false: a step counter is a learning app. (a) False (b) True
22. 22.True or false: a finger hits Like is a tap event. (a) False (b) True
23. 23.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Meera", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Meera (b) Hi, Arjun (c) Hi, Riya
24. 24.🎨 UI stands for user ___. (a) interface (b) idea (c) internet (d) input
25. 25.🐞 After fixing a bug you should ___. (a) never test (b) delete the test (c) test it again (d) release at once
26. 26.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) export to a file (b) pie-chart colours (c) savings stickers (d) add money received
27. 27.True or false: space between buttons is poor button design. (a) False (b) True
28. 28.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. tap Back
    3. open “Friend list”
    How many times must you tap Back to reach the main screen of this tab?
29. 29.🧰 What does return do in a function? (a) repeats the code (b) deletes the app (c) closes the screen (d) sends back a value
30. 30.Which of these requests is fair? (a) quiz app → microphone (b) calculator → location (c) torch → contacts (d) calling app → contacts
31. 31.🔀 What number does this shop app show?
    let total = 420;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
32. 32.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Title: 27 px
    Footer: 16 px
    Caption: 25 px
    Body text: 10 px (a) Caption (b) Title (c) Footer (d) Body text
33. 33.💾 In most code, the first item of a list is at position ___. (a) 10 (b) 1 (c) 0 (d) 2
34. 34.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 39; // start at 39
    line 2: score = score * 2; // double it
    line 3: score = score - 5; // take away 2
    line 4: score = score * 2; // double it
    line 5: show(score); // show it
35. 35.🔢 In a sign-up flow, what comes right after “open the app”? (a) make a password (b) tap “Sign up” (c) enter the code sent (d) type name and email
36. 36.🔔 What is a message an app shows on your lock screen called? (a) a variable (b) a wireframe (c) a web address (d) a notification
37. 37.📱 Which one opens in a web browser: an app or a website? (a) an app (b) a website
38. 38.Which of these is about UX (the experience)? (a) the screen layout (b) the icon shapes (c) how users feel after (d) the button colours
39. 39.🔀 What is a user flow? (a) a type of font (b) a colour theme (c) a charging cable (d) the path through screens
40. 40.🔢 After an app is released, which comes FIRST? (a) fix and improve (b) test it again (c) read user reviews (d) release an update

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