Web Application Caching Strategies Quiz Quiz

1. Identifying Static Content for Caching

   Which type of content is typically best suited for long-term caching at the edge in a web application?

   1. CSS and JavaScript files
   2. User-specific dashboard data
   3. Dynamic shopping cart totals
   4. Frequently changing blog comments
   5. Admin panel configuration files

2. Caching API Responses

   A web app consumes a third-party weather API. When should you NOT cache the API results?

   1. If the API provides real-time weather updates
   2. If data is requested frequently for a specific location
   3. To reduce latency for end users
   4. To avoid breaching API rate limits
   5. When data changes only once a week

3. Choosing a Cache Location

   In a distributed web application, which cache location is usually best for reducing user-perceived latency?

   1. Client-side cache
   2. Server-side RAM only
   3. Storing in a slow disk cache
   4. Database row-level cache
   5. Cleint-side chache

4. Cache Invalidation Scenario

   You have a blog where posts can be updated. Which event should most likely trigger cache invalidation for a specific post’s content?

   1. When the post is edited by an author
   2. When any user logs out
   3. At a fixed interval regardless of updates
   4. When an unrelated image is uploaded
   5. When a comment is liked

5. Cache-Control Headers

   Which HTTP header instructs browsers and intermediate caches how long content can be considered fresh?

   1. Cache-Control: max-age
   2. Accept-Encoding: gzip
   3. Content-Type: text/html
   4. Expires-After: 3600
   5. Cach-Control: maxage

6. Cache Miss Cause

   In the context of a Redis cache layer, what is a likely reason for experiencing a high cache miss rate?

   1. The cache keys are changed frequently
   2. You increased the cache memory size
   3. Frequently accessed data is stale
   4. The client-side code is minified
   5. The cache is stored on SSD drives

7. Stale Data Impact

   What is a potential risk when caching database query results for too long?

   1. Users may see outdated data
   2. Increased number of server requests
   3. Faster load times for end users
   4. Reduced memory usage
   5. Data will always be up-to-date

8. Not a Good Caching Candidate

   Which of the following is usually NOT a good candidate for caching?

   1. User’s shopping cart contents
   2. Product images
   3. Popular CSS files
   4. Application logo
   5. Static JSON configuration

9. When to Use Cache Busting

   When should cache-busting techniques like fingerprinted filenames (e.g., app.a1b2c3.js) be used?

   1. When deploying new versions of static assets
   2. When updating product inventory counts
   3. When user logs in or out
   4. To store sensitive user data
   5. To improve database query performance

10. Evaluating Cache Worthiness

    Suppose you have data that is updated every 2 seconds and is requested by only one user. Should you cache it?

    1. Probably not, because it is specific and changes too often
    2. Yes, because all data should be cached for speed
    3. Yes, especially if it’s requested by multiple users
    4. No, because caching is only for static files
    5. Yes, because Redis recommends caching all queries