App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 277 · 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.👆 The user taps the button 6 times. What number does the label show now?
   let likes = 0;
   button.onTap = function () {
     if (likes < 3) {
       likes = likes + 1;
     }
     label.text = likes;
   };
2. 2.True or false: a pop-up message is an output. (a) True (b) False
3. 3.Which of these makes the app harder to use? (a) fast-flashing lights (b) strong colour contrast (c) labels on every icon (d) captions on videos
4. 4.Which of these fits saving on the phone? (a) photos on two devices (b) the sound on/off setting (c) a class leaderboard (d) a shared to-do list
5. 5.🛠️ At which stage do you write the code? (a) the release stage (b) the idea stage (c) the plan stage (d) the build stage
6. 6.🔢 In a photo-post flow, which comes first: “open the camera screen” or “post the photo”? (a) post the photo (b) open the camera screen
7. 7.🧭 Which part of navigation opens a list of pages? (a) a tab bar (b) the back button (c) a menu button
8. 8.🔍 Which is the odd one out? (a) how users feel after (b) how easy sign-up is (c) the screen layout (d) whether users get lost
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 12; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
10. 10.🔍 Which is the odd one out? (a) tiny tap areas (b) strong colour contrast (c) big touch targets (d) text that can grow
11. 11.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(3) → expected Try again
    Test 2: result(5) → expected Pass
    Test 3: result(6) → expected Pass
12. 12.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 43; // start at 43
    line 2: score = score * 2; // double it
    line 3: score = score * 3; // double it
    line 4: show(score); // show it (a) line 1 (b) line 2 (c) line 3
13. 13.🔍 Which is the odd one out? (a) an alarm clock (b) a torch (c) a unit converter (d) a sleep tracker
14. 14.🎯 Is this a user need or a feature: “I keep missing the bus”? (a) a user need (b) a feature
15. 15.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) yellow on white (d) dark blue on black
16. 16.True or false: a pocket-money tracker is the best fit for a child saving up for a cycle. (a) False (b) True
17. 17.True or false: an app comes from an app store. (a) False (b) True
18. 18.🧰 In function tip(bill), what is bill? (a) a loop (b) a screen (c) an event (d) a parameter
19. 19.Which of these happens at the idea stage? (a) try every button (b) spot a problem to solve (c) write the code (d) draw the user flow
20. 20.True or false: checking a password is an input. (a) False (b) True
21. 21.Which of these fits saving in the cloud? (a) the sound on/off setting (b) a draft you are typing (c) a class leaderboard (d) your last game level
22. 22.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 50;
    }
    show(fee(7) + fee(10));
23. 23.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) helps everyone (b) makes it harder
24. 24.🔍 Which is the odd one out? (a) sketch the screens (b) spot a problem to solve (c) list what users need (d) talk to possible users
25. 25.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ filter buttons ]
    [ menu icon ]
    [ tab bar ]
    [ top bar ]
    [ list of items ] (a) top bar (b) tab bar (c) list of items (d) filter buttons
26. 26.True or false: tap to Save is a button. (a) True (b) False
27. 27.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(38));
28. 28.🎯 What is a user need? (a) a colour theme (b) a problem a user has (c) a type of button (d) a phone setting
29. 29.📊 Survey: which problem bugs you most? How many students voted in all?
    no quiet study place: 12 votes
    forgetting homework: 18 votes
    missing the bus: 17 votes
30. 30.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. open “Edit photo”
    3. tap Back
    4. open “Match report”
    5. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
31. 31.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) export to a file (b) savings stickers (c) pie-chart colours (d) add money received
32. 32.✏️ Do wireframes usually show the final colours? (a) No (b) Yes
33. 33.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Help page”
    2. open “Match report”
    3. open “Edit photo”
    4. open “Match report”
    5. tap Back
    Which screen are you on now? (a) Match report (b) Help page (c) Home (d) Edit photo
34. 34.🧩 In an app, what is a date picker? (a) an input (b) a screen (c) data (d) a button
35. 35.🚀 Your app is at version 2.10.9. The next release fixes a small bug. What is its version number? (a) 2.10.10 (b) 3.0.0 (c) 2.11.0 (d) 2.11.9
36. 36.💾 Where should the app save the sound on/off setting: on the phone or in the cloud? (a) on the phone (b) in the cloud
37. 37.🗒️ Version 1 of a water reminder must be ready in 12 days. How many days are left for extras after the must-haves?
    set a reminder time: 1 days
    log a glass of water: 3 days
    see today’s total: 5 days
38. 38.True or false: a medicine reminder solves no real problem. (a) False (b) True
39. 39.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Search → Item → Cart → Size → Menu
    Design B: Home → Pens → Shop → Menu → Offers (a) Design B (b) Design A
40. 40.🚀 Which version is newer: 3.2.4 or 3.2.19? (a) 3.2.19 (b) 3.2.4

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