App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 894 · 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 good flow, each screen should lead to ___. (a) a clear next step (b) a dead end (c) a random page (d) the same screen
2. 2.🧰 What number does this code show?
   function points(stars) {
     return stars * 10 + 5;
   }
   show(points(5) + points(3));
3. 3.💾 What number does this code show?
   let notes = ["Art", "Music"];
   notes.push("Hindi");
   notes.push("Maths");
   show(notes.length);
4. 4.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
   1. open “Help page”
   2. open “Edit photo”
   3. open “Map”
   How many times must you tap Back to reach the main screen of this tab?
5. 5.🧩 Which of these is a button on this screen?
   [title] Order Snacks
   [slider] Text size
   [switch] Dark mode
   [text box] City
   [button] Save (a) Dark mode (b) Text size (c) City (d) Save
6. 6.🎨 Is this about UI or UX: whether users get lost? (a) UX (b) UI
7. 7.🧩 How many buttons does this app screen have?
   [title] Sign Up
   [button] Cancel
   [button] Done
   [text box] City
   [button] Next
   [text box] Due date
8. 8.🗂️ What kind of app is a puzzle with levels? (a) a game (b) a health app (c) a learning app (d) a tool app
9. 9.True or false: buttons almost touching is poor button design. (a) False (b) True
10. 10.🧪 What is the actual result of a test? (a) what we hope for (b) the app’s name (c) the test’s number (d) what the app really does
11. 11.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Help page”
    2. tap Back
    3. tap the Lessons tab
    How many times must you tap Back to reach the main screen of this tab?
12. 12.💡 Which app idea solves this problem: a patient misses doses? (a) a lost-and-found board (b) a study-room finder (c) a homework planner (d) a medicine reminder
13. 13.🖼️ In this wireframe (top to bottom), what is right below the tab bar?
    [ tab bar ]
    [ Add button ]
    [ title text ]
    [ filter buttons ] (a) title text (b) Add button (c) filter buttons
14. 14.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) set a reminder time (b) see today’s total (c) water animations (d) log a glass of water
15. 15.🔢 In a quiz-app flow, what comes right after “see if it is right”? (a) read a question (b) tap “Start quiz” (c) see the final score (d) pick an answer
16. 16.True or false: a big, easy tap area is good button design. (a) True (b) False
17. 17.♿ A screen has 5 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
18. 18.🎨 Fewer taps to finish a task usually means ___. (a) better UX (b) a bigger app (c) more colours (d) worse UX
19. 19.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    losing water bottles: 3 votes
    wasting pocket money: 17 votes
    forgetting birthdays: 9 votes (a) losing water bottles (b) wasting pocket money (c) forgetting birthdays
20. 20.🔍 Which is the odd one out? (a) try every button (b) spot a problem to solve (c) write down the bugs (d) let friends try it
21. 21.🎯 An app for “everyone” with no clear user usually ___. (a) is easy to build (b) helps nobody well (c) wins every prize (d) needs no testing
22. 22.🔍 Which is the odd one out? (a) typing your age (b) adding up a bill (c) taking a photo (d) tapping a button
23. 23.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ list of items ]
    [ top bar ]
    [ Add button ]
    [ filter buttons ]
    [ Save button ]
    [ title text ] (a) top bar (b) filter buttons (c) title text (d) list of items
24. 24.🔀 What does if / else let an app do? (a) repeat forever (b) draw a screen (c) pick one of two actions (d) save a photo
25. 25.True or false: you draw the user flow at the plan stage. (a) True (b) False
26. 26.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(50, 6));
27. 27.Which of these is true of a tab bar? (a) undoes one move (b) shows 3 to 5 icons (c) goes to the last screen (d) opens a list of pages
28. 28.Which of these is true of a menu button? (a) undoes one move (b) sits at the bottom (c) switches main sections (d) hides extra links
29. 29.True or false: a bill splitter solves a real problem. (a) True (b) False
30. 30.Which of these is true of an app? (a) opens in a web browser (b) needs no installing (c) opens from a link (d) is installed on a phone
31. 31.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Meera")); (a) Meera (b) Hello, Meera! (c) Hello, name! (d) greet
32. 32.👆 What kind of event is this: the app starts up? (a) a timer event (b) a tap event (c) a text event (d) a load event
33. 33.🔁 list.length tells you ___. (a) the biggest item (b) how many items it has (c) the last item (d) the first item
34. 34.👥 A cricket club app has 25 players, 40 coaches and 95 fans as users. Which user group is the biggest? (a) coaches (b) players (c) fans
35. 35.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age <= 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(12) → expected 100
    Test 2: price(10) → expected 100
    Test 3: price(5) → expected 50
36. 36.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 45; // start at 43
    line 2: lives = lives + 2; // add 2
    line 3: lives = lives - 1; // take away 1
    line 4: show(lives); // show it (a) line 3 (b) line 2 (c) line 1
37. 37.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
    function price(age) {
      if (age <= 10) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(10) → expected 100 (a) Test 1 (b) Test 3 (c) Test 2
38. 38.🧩 In an app, what is the game-over page? (a) data (b) a screen (c) an input (d) a button
39. 39.🔁 What does a loop do? (a) repeats code (b) saves photos (c) deletes code (d) draws icons
40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read

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