App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 387 · 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.🧩 Scores, notes and settings that an app keeps are called ___. (a) screens (b) tabs (c) buttons (d) data
2. 2.🖼️ In this wireframe (top to bottom), what is right above the top bar?
   [ big picture ]
   [ list of items ]
   [ top bar ]
   [ search box ]
   [ tab bar ]
   [ Add button ] (a) tab bar (b) search box (c) list of items (d) big picture
3. 3.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
4. 4.🧩 How many buttons does this app screen have?
   [title] Sign Up
   [text box] Subject
   [text box] Name
   [button] Help
   [switch] Show hints
5. 5.True or false: the app starts up is a tap event. (a) True (b) False
6. 6.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   forgetting birthdays: 21 votes
   forgetting homework: 8 votes
   wasting pocket money: 6 votes (a) forgetting birthdays (b) wasting pocket money (c) forgetting homework
7. 7.🔁 What number does this code show?
   let runs = [13, 94, 21, 26];
   let count = 0;
   for (let i = 0; i < runs.length; i++) {
     if (runs[i] >= 40) {
       count = count + 1;
     }
   }
   show(count);
8. 8.🔢 In a photo-post flow, which comes first: “take the photo” or “write a caption”? (a) write a caption (b) take the photo
9. 9.🔁 What number does this code show?
   let steps = [8, 1, 5];
   let total = 0;
   for (let i = 0; i < steps.length; i++) {
     total = total + steps[i];
   }
   show(total);
10. 10.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) easy cases (b) old cases (c) phone cases (d) edge cases
11. 11.True or false: a final design is a quick sketch. (a) True (b) False
12. 12.👥 A school app has 105 students, 270 teachers and 230 parents as users. How many more parents than students are there?
13. 13.🚀 Which version is newer: 3.0.17 or 3.0.5? (a) 3.0.17 (b) 3.0.5
14. 14.🧩 In an app, what is the log-in page? (a) an input (b) a screen (c) a button (d) data
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Save button: 44 px tall
    Help button: 44 px tall
    Next button: 56 px tall
16. 16.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ list of items ]
    [ filter buttons ]
    [ tab bar ]
    [ big picture ]
    [ top bar ]
    [ menu icon ] (a) big picture (b) menu icon (c) filter buttons (d) list of items
17. 17.🔢 In a quiz-app flow, what comes right after “pick an answer”? (a) see the final score (b) read a question (c) see if it is right (d) tap “Start quiz”
18. 18.True or false: your friends list is data. (a) False (b) True
19. 19.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Size → Cart → Shop
    Design B: Home → Shop → Item → Pay → Search
20. 20.♿ Accessibility means an app works for ___. (a) nobody (b) only the coder (c) only experts (d) everyone
21. 21.💡 Does an app idea like an app that just says hi solve a real problem? (a) No (b) Yes
22. 22.🔍 Which is the odd one out? (a) an alarm clock (b) a unit converter (c) a cricket run chase (d) a calculator
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 57; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 1 (b) line 4 (c) line 2 (d) line 3
24. 24.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a lost-and-found board (b) a study-room finder (c) a medicine reminder (d) a bill splitter
25. 25.🧪 How many of these test cases pass?
    🎟️ 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(7) → expected 50
    Test 2: price(13) → expected 100
    Test 3: price(10) → expected 100
26. 26.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) a beep sound (d) typing your age
27. 27.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Help page”
    2. tap Back
    3. open “Video”
    4. tap the Lessons tab
    5. open “Video”
    How many times must you tap Back to reach the main screen of this tab?
28. 28.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “forgetting homework”?
    forgetting birthdays: 25 votes
    no quiet study place: 9 votes
    forgetting homework: 5 votes
29. 29.🔢 When you make an app, which comes FIRST? (a) test the app (b) release it (c) get an idea (d) build the app
30. 30.True or false: a wireframe shows where things go. (a) False (b) True
31. 31.💾 Saving data in the cloud lets you ___. (a) skip the internet (b) shrink the app (c) use it on any device (d) never need a password
32. 32.👆 Code that runs when an event happens is called a ___. (a) handler (b) headline (c) header (d) hashtag
33. 33.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 6 or more right answers.
    function result(right) {
      if (right > 6) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(8) → expected Pass
    Test 3: result(5) → expected Try again (a) Test 1 (b) Test 2 (c) Test 3
34. 34.Which of these happens at the release stage? (a) share the download link (b) let friends try it (c) draw the user flow (d) try every button
35. 35.🧩 In an app, what is the settings page? (a) an input (b) data (c) a screen (d) a button
36. 36.Which of these is a screen? (a) a box to type a name (b) tap to Send (c) the settings page (d) a switch for dark mode
37. 37.🔢 In a quiz-app flow, which comes first: “tap “Start quiz”” or “see the final score”? (a) see the final score (b) tap “Start quiz”
38. 38.🔀 What does this battery rule show?
    let battery = 88;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
39. 39.🔢 In a food-order flow, which comes first: “pick a dish” or “open the menu”? (a) open the menu (b) pick a dish
40. 40.🔀 What does this battery rule show?
    let battery = 97;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery

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