App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 502 · 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.📅 An app team plans for 4 days, builds for 11 days, tests for 2 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
2. 2.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) on day one (c) never (d) before anything
3. 3.🗒️ 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) change the bus icon (d) see where the bus is
4. 4.🔐 Is this permission request fair or too much: torch → contacts? (a) fair (b) too much
5. 5.♿ A screen has 5 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
6. 6.🔀 Which badge does this quiz app show?
   let marks = 48;
   if (marks >= 80) {
     show("Gold");
   } else if (marks >= 50) {
     show("Silver");
   } else {
     show("Bronze");
   } (a) Silver (b) Bronze (c) Gold
7. 7.🔀 What is a user flow? (a) the path through screens (b) a colour theme (c) a charging cable (d) a type of font
8. 8.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
   Menu: 23 px
   Body text: 24 px
   Footer: 20 px
9. 9.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let points = 39; // start at 38
   line 2: points = points * 2; // double it
   line 3: points = points - 4; // take away 4
   line 4: show(points); // show it
10. 10.💡 How can you check that people really have the problem? (a) ask possible users (b) just guess (c) pick a colour (d) copy another app
11. 11.Which of these is true of a tab bar? (a) undoes one move (b) hides extra links (c) opens a list of pages (d) sits at the bottom
12. 12.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
13. 13.🚀 Which version is newer: 3.4.2 or 3.4.12? (a) 3.4.2 (b) 3.4.12
14. 14.🔀 What does this sign-up rule show?
    let age = 14;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
15. 15.True or false: notes to read offline fits saving in the cloud. (a) False (b) True
16. 16.True or false: the search box changes is a tap event. (a) False (b) True
17. 17.🧰 What does return do in a function? (a) deletes the app (b) closes the screen (c) sends back a value (d) repeats the code
18. 18.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 50; // start at 47
    line 2: stars = stars + 6; // add 6
    line 3: stars = stars * 2; // double it
    line 4: show(stars); // show it
19. 19.🔢 When you make an app, what comes right after “get an idea”? (a) plan the screens (b) test the app (c) release it (d) build the app
20. 20.Which of these is true of a website? (a) comes from an app store (b) updates from the store (c) opens in a web browser (d) is installed on a phone
21. 21.🎯 Which app would help this user most: a gamer who forgets to drink? (a) a bus tracker (b) a water reminder (c) a recipe finder (d) a homework planner
22. 22.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 30; // start at 30
    line 2: score = score + 3; // add 3
    line 3: score = score + 3; // add 2
    line 4: show(score); // show it
23. 23.Which colour pair is hard to read? (a) white on black (b) red on green (c) dark blue on white (d) black on yellow
24. 24.🧰 What is a function? (a) a named block of code (b) a list of colours (c) a screen size (d) a type of phone
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
26. 26.True or false: a torch is a health app. (a) True (b) False
27. 27.💾 Where should the app save a shared to-do list: on the phone or in the cloud? (a) in the cloud (b) on the phone
28. 28.🔢 In a quiz-app flow, which comes FIRST? (a) read a question (b) see if it is right (c) see the final score (d) tap “Start quiz”
29. 29.👥 A school app has 280 students, 155 teachers and 25 parents as users. Which user group is the biggest? (a) parents (b) students (c) teachers
30. 30.🧩 Which of these is a button on this screen?
    [title] New Note
    [button] Back
    [button] Done
    [text box] Due date
    [button] Send
    [text box] Name
    [text box] Notes (a) Back (b) Due date (c) Name (d) Notes
31. 31.True or false: grey text on grey is poor button design. (a) True (b) False
32. 32.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 40;
    }
    show(fee(6) + fee(12));
33. 33.🔢 When you make an app, which comes first: “test the app” or “build the app”? (a) test the app (b) build the app
34. 34.Which of these app ideas solves a real problem? (a) a blank grey screen (b) an app that just says hi (c) a free study-room finder (d) a page of random dots
35. 35.🖼️ In this wireframe (top to bottom), what is right above the search box?
    [ list of items ]
    [ search box ]
    [ Add button ]
    [ top bar ] (a) list of items (b) top bar (c) Add button
36. 36.True or false: a water reminder is the best fit for a gamer who forgets to drink. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) the icon shapes (b) the font size (c) the button colours (d) how users feel after
38. 38.True or false: a flashcard trainer is a health app. (a) True (b) False
39. 39.Which of these is true of a wireframe? (a) shows the real fonts (b) looks like the real app (c) shows where things go (d) has the real colours
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?

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