App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 29 · 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 true of an app? (a) opens in a web browser (b) is installed on a phone (c) needs no installing (d) has a web address
2. 2.Which of these is data? (a) tap to Send (b) your high score (c) the game-over page (d) a switch for dark mode
3. 3.True or false: the game-over page is data. (a) True (b) False
4. 4.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(20, 3));
5. 5.Which of these is a user need? (a) “I keep missing the bus” (b) a dark mode switch (c) a search bar (d) a reminder alarm
6. 6.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Edit photo”
   2. open “Video”
   3. tap Back
   How many times must you tap Back to reach the main screen of this tab?
7. 7.💾 What number does this code show?
   let stars = 4;
   stars = stars - 1;
   stars = stars + 1;
   show(stars);
8. 8.🔀 With if / else if / else, how many parts run? (a) all of them (b) none (c) two (d) only one
9. 9.⚙️ What number does this app show?
   let bill = 64; // typed by the user
   let friends = 4; // typed by the user
   let share = bill / friends;
   show(share);
10. 10.Which of these is true of a website? (a) has a web address (b) updates from the store (c) has a home-screen icon (d) comes from an app store
11. 11.Which of these requests is fair? (a) calculator → location (b) camera app → camera (c) quiz app → microphone (d) torch → contacts
12. 12.🔐 Which permission does a guitar tuner really need? (a) the camera (b) the microphone (c) contacts (d) location
13. 13.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(15));
14. 14.💾 Where should the app save chat messages to friends: on the phone or in the cloud? (a) in the cloud (b) on the phone
15. 15.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(500) → expected 0
    Test 2: delivery(300) → expected 40
    Test 3: delivery(600) → expected 0 (a) Test 3 (b) Test 2 (c) Test 1
16. 16.🎨 UX stands for user ___. (a) experience (b) express (c) example (d) extra
17. 17.True or false: a 5-minute alarm ends is a timer event. (a) True (b) False
18. 18.Which of these is true of a menu button? (a) sits at the bottom (b) hides extra links (c) goes to the last screen (d) undoes one move
19. 19.🖼️ In this wireframe (top to bottom), what is right above the menu icon?
    [ search box ]
    [ tab bar ]
    [ menu icon ]
    [ Save button ]
    [ top bar ]
    [ list of items ] (a) list of items (b) tab bar (c) search box (d) top bar
20. 20.🔢 After an app is released, which comes LAST? (a) release an update (b) test it again (c) read user reviews (d) list what to fix
21. 21.🔐 Is this permission request fair or too much: timer → your photos? (a) too much (b) fair
22. 22.Which of these is true of a wireframe? (a) has the real colours (b) has no real colours (c) shows the real fonts (d) looks like the real app
23. 23.Which of these is a feature? (a) “I keep missing the bus” (b) “I forget my homework” (c) a reminder alarm (d) “Small text is hard”
24. 24.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) pick a theme colour (b) share tasks to friends (c) add a homework task (d) earn stickers
25. 25.🧪 What is the ACTUAL result of Test 2?
    🎟️ 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(13) → expected 100
    Test 2: price(12) → expected 100
    Test 3: price(9) → expected 50
26. 26.🧰 What does this code show?
    function greet(name) {
      return "Hi, " + name + "!";
    }
    show(greet("Kabir")); (a) greet (b) Hi, Kabir! (c) Kabir (d) Hi, name!
27. 27.🔁 In for (let i = 0; i < 3; i++), which values does i take? (a) 1, 2, 3 (b) 0, 1, 2, 3 (c) 3 (d) 0, 1, 2
28. 28.🔢 In a food-order flow, which comes first: “pick a dish” or “open the menu”? (a) open the menu (b) pick a dish
29. 29.Which of these is data? (a) your friends list (b) the home page of an app (c) the log-in page (d) the settings page
30. 30.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
31. 31.🧰 What is a function? (a) a list of colours (b) a screen size (c) a named block of code (d) a type of phone
32. 32.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 39; // start at 37
    line 2: coins = coins - 3; // take away 3
    line 3: coins = coins - 3; // take away 3
    line 4: coins = coins + 3; // add 3
    line 5: show(coins); // show it
33. 33.🖼️ In this wireframe (top to bottom), what is right above the search box?
    [ filter buttons ]
    [ Add button ]
    [ search box ]
    [ top bar ]
    [ big picture ] (a) Add button (b) top bar (c) filter buttons (d) big picture
34. 34.🎯 Which app would help this user most: a gamer who forgets to drink? (a) a water reminder (b) a homework planner (c) a big-text reader (d) a pocket-money tracker
35. 35.True or false: you write down the bugs at the test stage. (a) False (b) True
36. 36.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Size → Cart → Shop → Item → Confirm
    Design B: Home → Search → Menu (a) Design A (b) Design B
37. 37.🧪 What is the ACTUAL result of Test 3?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(350) → expected 40
    Test 2: delivery(950) → expected 0
    Test 3: delivery(800) → expected 0
38. 38.True or false: the sound on/off setting fits saving on the phone. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a word battle (b) a racing challenge (c) a puzzle with levels (d) a sleep tracker
40. 40.🧩 In an app, what is tap to Send? (a) a screen (b) data (c) a button (d) an input

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