App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 264 · 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.🖼️ How many parts (boxes) does this wireframe have?
   [ list of items ]
   [ filter buttons ]
   [ Save button ]
   [ tab bar ]
2. 2.🎯 Which app would help this user most: a student who often misses the school bus? (a) a bus tracker (b) a homework planner (c) a pocket-money tracker (d) a water reminder
3. 3.Which of these fits saving on the phone? (a) chat messages to friends (b) photos on two devices (c) a draft you are typing (d) a shared to-do list
4. 4.Which of these is about UX (the experience)? (a) the icon shapes (b) the screen layout (c) the button colours (d) how easy sign-up is
5. 5.👆 The user taps the button 6 times. What number does the label show now?
   let points = 5;
   button.onTap = function () {
     points = points + 3;
     label.text = points;
   };
6. 6.🔀 What does this battery rule show?
   let battery = 18;
   if (battery < 20) {
     show("Low battery");
   } else {
     show("Battery OK");
   } (a) Battery OK (b) Low battery
7. 7.🧪 How many of these test cases pass?
   📝 Rule: a quiz is passed with 8 or more right answers.
   function result(right) {
     if (right >= 8) {
       return "Pass";
     }
     return "Try again";
   }
   Test 1: result(10) → expected Pass
   Test 2: result(6) → expected Try again
   Test 3: result(9) → expected Pass
8. 8.💾 pop() takes off the last item. What does this code show?
   let notes = ["Maths", "Hindi", "Art", "Science", "Music"];
   notes.pop();
   show(notes[notes.length - 1]); (a) Art (b) Maths (c) Hindi (d) Science
9. 9.True or false: chat messages to friends fits saving on the phone. (a) True (b) False
10. 10.🗂️ What kind of app is an alarm clock? (a) a learning app (b) a health app (c) a game (d) a tool app
11. 11.🔢 When you make an app, which comes first: “plan the screens” or “test the app”? (a) plan the screens (b) test the app
12. 12.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(4) + points(5));
13. 13.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a final design (b) a wireframe
14. 14.📅 An app team plans for 4 days, builds for 11 days, tests for 2 days and releases on 1 more day. How many more days does building take than testing?
15. 15.🔍 Which is the odd one out? (a) write the store text (b) put it on an app store (c) share the download link (d) write down the bugs
16. 16.🎯 A short made-up profile of a typical user is called a ___. (a) protocol (b) pixel (c) password (d) persona
17. 17.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 30; // start at 30
    line 2: stars = stars * 3; // double it
    line 3: stars = stars - 1; // take away 1
    line 4: stars = stars - 1; // take away 1
    line 5: show(stars); // show it (a) line 4 (b) line 1 (c) line 3 (d) line 2
18. 18.True or false: a website comes from an app store. (a) False (b) True
19. 19.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Kabir")); (a) Kabir (b) greet (c) Hello, Kabir! (d) Hello, name!
20. 20.True or false: a big-text reader is the best fit for a pupil juggling five projects. (a) True (b) False
21. 21.True or false: a torch is a game. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a result on screen (b) typing your age (c) tapping a button (d) taking a photo
23. 23.Which of these is true of a tab bar? (a) goes to the last screen (b) hides extra links (c) undoes one move (d) shows 3 to 5 icons
24. 24.Which of these fits saving in the cloud? (a) chat messages to friends (b) a draft you are typing (c) notes to read offline (d) the sound on/off setting
25. 25.🔢 In a food-order flow, what comes right after “pick a dish”? (a) open the menu (b) track the order (c) add it to the cart (d) check the cart
26. 26.🗒️ The first small, working version of an app is often called an ___. (a) MVP (b) FAQ (c) URL (d) CPU
27. 27.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ filter buttons ]
    [ list of items ]
    [ tab bar ]
    [ top bar ] (a) filter buttons (b) top bar (c) tab bar (d) list of items
28. 28.Which of these is an input? (a) adding up a bill (b) working out a tip (c) typing your age (d) a result on screen
29. 29.👆 The user taps the button 5 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 2) {
        likes = likes + 1;
      }
      label.text = likes;
    };
30. 30.Which of these is a user need? (a) a search bar (b) “What should I cook?” (c) a dark mode switch (d) a share button
31. 31.🗒️ In MVP, the M stands for ___. (a) music (b) minimum (c) maximum (d) mobile
32. 32.🧩 Which input is best for choosing a volume level? (a) a switch (b) a title (c) a text box (d) a slider
33. 33.🐞 A comment in code (after //) is for ___. (a) the phone screen (b) people reading the code (c) the battery (d) the app store
34. 34.True or false: a free study-room finder solves no real problem. (a) False (b) True
35. 35.🎯 Who are the users of an app? (a) only the testers (b) the app icons (c) the people who use it (d) only the coders
36. 36.True or false: your high score is data. (a) True (b) False
37. 37.Which of these app ideas solves a real problem? (a) a page of random dots (b) a lost-and-found board (c) a button with no action (d) an app that just says hi
38. 38.💾 What number does this code show?
    let friends = ["Zoya", "Meera"];
    friends.push("Arjun");
    show(friends.length);
39. 39.🧭 About how many tabs suit a tab bar best? (a) 1 (b) 3 to 5 (c) 10 to 12 (d) 20
40. 40.🧩 What does a button do when you tap it? (a) changes the phone (b) saves the battery (c) starts an action (d) shows the time

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