App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 557 · 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.Which of these is an output? (a) a pop-up message (b) sorting the scores (c) checking a password (d) adding up a bill
2. 2.🔍 Which is the odd one out? (a) share the download link (b) put it on an app store (c) write the store text (d) let friends try it
3. 3.🧪 What is the ACTUAL result of Test 1?
   🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
   function price(age) {
     if (age <= 12) {
       return 50;
     }
     return 100;
   }
   Test 1: price(16) → expected 100
   Test 2: price(11) → expected 50
   Test 3: price(14) → expected 100
4. 4.🧩 In an app, what is a box to type a name? (a) data (b) a button (c) an input (d) a screen
5. 5.👥 A library app has 60 readers, 70 librarians and 265 volunteers as users. Which user group is the biggest? (a) volunteers (b) librarians (c) readers
6. 6.⚙️ What number does this app show?
   let bill = 180; // typed by the user
   let friends = 4; // typed by the user
   let share = bill / friends;
   show(share);
7. 7.✏️ A box with a cross in a wireframe usually means ___. (a) a picture goes here (b) a closed app (c) delete this (d) an error
8. 8.🧰 What is a function? (a) a list of colours (b) a screen size (c) a named block of code (d) a type of phone
9. 9.🧪 How many of these test cases pass?
   🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
   function delivery(total) {
     if (total >= 800) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(1050) → expected 0
   Test 2: delivery(800) → expected 0
   Test 3: delivery(700) → expected 40
10. 10.True or false: a final design is a quick sketch. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) adding up a bill (b) tapping a button (c) working out a tip (d) checking a password
12. 12.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) see tasks by day (b) pick a theme colour (c) earn stickers (d) share tasks to friends
13. 13.👆 The user taps the button 2 times. What number does the label show now?
    let score = 8;
    button.onTap = function () {
      score = score + 4;
      label.text = score;
    };
14. 14.🔢 In a food-order flow, which comes first: “pick a dish” or “open the menu”? (a) pick a dish (b) open the menu
15. 15.🚀 Your app is at version 3.2.2. The next release is a big redesign that changes how the app works. What is its version number? (a) 3.2.3 (b) 3.3.0 (c) 3.3.2 (d) 4.0.0
16. 16.Which of these is true of a final design? (a) uses plain grey boxes (b) has no real colours (c) has the real colours (d) shows where things go
17. 17.True or false: the home page of an app is a screen. (a) False (b) True
18. 18.👆 What kind of event is this: the user taps Play? (a) a text event (b) a tap event (c) a timer event (d) a load event
19. 19.💾 What does this code show? (Positions start at 0.)
    let friends = ["Kabir", "Arjun", "Meera", "Riya"];
    show(friends[0]); (a) Kabir (b) Arjun (c) Riya (d) Meera
20. 20.🧪 What is the ACTUAL result of Test 3?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(750) → expected 0
    Test 2: delivery(900) → expected 0
    Test 3: delivery(500) → expected 40
21. 21.🔢 After an app is released, what comes right after “list what to fix”? (a) release an update (b) read user reviews (c) fix and improve (d) test it again
22. 22.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 43; // start at 42
    line 2: score = score * 2; // double it
    line 3: score = score - 2; // take away 2
    line 4: show(score); // show it
23. 23.📅 An app team plans for 5 days, builds for 6 days, tests for 2 days and releases on 1 more day. How many more days does building take than testing?
24. 24.🧪 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(7) → expected Pass
    Test 2: result(2) → expected Try again
    Test 3: result(9) → expected Pass
25. 25.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money received (b) add money spent (c) show the balance (d) pie-chart colours
26. 26.♿ A screen has 7 icon buttons. Only 3 of them have a text label for screen readers. How many still need a label?
27. 27.🧪 A test case is an input together with its ___. (a) font size (b) expected result (c) app icon (d) screen colour
28. 28.🧩 Which of these is a button on this screen?
    [title] Settings
    [button] Help
    [button] Save
    [text box] Phone
    [button] Cancel (a) Save (b) Phone
29. 29.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) in the cloud (b) on the phone
30. 30.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age < 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 50
    Test 2: price(13) → expected 100
    Test 3: price(18) → expected 100
31. 31.👥 A school app has 80 students, 285 teachers and 160 parents as users. How many users does it have in all?
32. 32.Which of these is about UI (the look)? (a) how users feel after (b) the font size (c) whether users get lost (d) how many taps it takes
33. 33.Which of these is about UI (the look)? (a) whether users get lost (b) how users feel after (c) the screen layout (d) how fast a task is done
34. 34.🎯 Why learn about users before you build? (a) to make it longer (b) to slow it down (c) to pick a logo (d) to build what they need
35. 35.✏️ What is the easiest way to draw a first wireframe? (a) a phone case (b) pencil and paper (c) a 3D printer (d) a microphone
36. 36.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 20;
    }
    show(fee(5) + fee(12));
37. 37.🧩 Which of these is a button on this screen?
    [title] New Note
    [button] Send
    [slider] Volume
    [switch] Remind me
    [text box] Due date
    [button] Cancel
    [button] Save (a) Due date (b) Remind me (c) Cancel (d) Volume
38. 38.🔁 What number does this code show?
    let steps = [11, 20, 14, 2, 10];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
39. 39.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 600 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 600) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(850) → expected 0
    Test 2: delivery(700) → expected 0
    Test 3: delivery(550) → expected 40
40. 40.🔁 Why use a loop to show 100 messages? (a) it hides them (b) less code to write (c) it uses more lines (d) it is slower

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