Web Storage u0026 Saving Game Progress Quiz Quiz

Deepen your understanding of web storage methods and best practices for saving game progress with this focused quiz. Explore scenarios and techniques involving local storage, session storage, and effective strategies for persistent data handling in browser-based games.

1. Choosing the Right Storage for Persistent Game Saves

   A browser-based game wants to keep players' progress saved even after the browser is closed and reopened. Which web storage method is most appropriate for this purpose?

   1. localStorage
   2. webCookies
   3. temporaryCache
   4. sessionStorage

   Explanation: localStorage keeps data stored even if the browser is closed and later reopened, making it ideal for saving persistent game progress. sessionStorage only retains data for the current session, so anything saved is lost once the tab is closed. temporaryCache is not a recognized web storage API, and webCookies can be used for persistence but are limited in size and sent with every HTTP request, making them less suitable for saving large or complex game progress.

2. Security Considerations for Client-Side Game Data

   When storing high-scores or achievements in localStorage, which risk should a developer be aware of?

   1. Data is compressed automatically
   2. Data can be easily modified by the user
   3. Data is deleted after a day
   4. Data is encrypted by default

   Explanation: localStorage data can be accessed and changed by users through browser tools, so it should not be trusted for critical values like scores without server-side validation. localStorage does not compress or encrypt data by default, which means sensitive information is not protected. The data is not deleted after a day; it remains until explicitly removed. This makes localStorage convenient but not secure for important game data.

3. Size Limitations When Saving Progress

   If a web game stores multiple levels of user progress in localStorage, which limitation must the developer keep in mind?

   1. localStorage requires an internet connection
   2. localStorage data is shared between all browsers
   3. localStorage has a storage size limit measured in megabytes
   4. localStorage can store unlimited data

   Explanation: localStorage typically has a limit of 5-10 megabytes per origin, so developers need to be aware not to exceed this when saving progress. It does not require an internet connection because it operates in the browser. Data is not shared between different browsers or devices, but only for the same origin. It cannot store unlimited data, which makes option D incorrect.

4. Serialization Before Storing Complex Data

   When saving a player's inventory (an array of objects) in localStorage, what step should be taken before storing the data?

   1. Compress the data using GZIP
   2. Encrypt the data automatically
   3. Save the array directly without conversion
   4. Convert the array to a JSON string

   Explanation: localStorage can only store strings, so developers must convert complex objects like arrays to a JSON string before storing them. The web storage API does not automatically compress or encrypt stored data, so options B and C are incorrect. Saving arrays or objects directly will not work as intended, so option D is incorrect as well.

5. Session-Based Game Features

   For a puzzle game that only needs to keep track of the current level while the tab remains open, which storage method is most efficient?

   1. sessionStorage
   2. localStorage
   3. localStore
   4. memoryCard

   Explanation: sessionStorage is designed to store data for the duration of a page session, meaning it is ideal for information needed only while a tab is open, like the current level. localStore is not a real web storage API, and memoryCard is unrelated to browser storage. localStorage persists beyond the session, which can be unnecessary or insecure for such temporary data.