E-Commerce Development E-Commerce Development Performance Optimization 2

Question 1

What is the benefit of using server-side rendering (SSR) or static site generation (SSG) for e-commerce product pages?

Accepted Answer

It delivers fully rendered HTML to the browser, improving initial load speed and SEO crawlability

Answer

SSR/SSG delivers pre-rendered HTML so the browser can display content immediately and search engine crawlers can index it without executing JavaScript, boosting both performance and SEO.

Question 2

Which HTTP caching header instructs the browser to store a response for a specific duration before revalidating?

Accepted Answer

Cache-Control: max-age

Answer

The `Cache-Control: max-age=<seconds>` header tells browsers and CDNs how long to cache a response before requesting a fresh copy, reducing server load for static assets.

Question 3

What technique reduces the number of HTTP requests by combining multiple CSS or JavaScript files into a single file?

Accepted Answer

Bundling (concatenation)

Answer

Bundling combines multiple CSS or JS files into a single file, reducing the number of HTTP requests the browser must make, which is especially important for HTTP/1.1 connections.

Question 4

What is 'database connection pooling' and why is it important for high-traffic e-commerce sites?

Accepted Answer

Reusing a pre-established set of database connections instead of creating a new one per request

Answer

Connection pooling maintains a pool of reusable database connections, eliminating the overhead of opening/closing a new connection for every incoming HTTP request during peak traffic.

Question 5

Which caching layer stores frequently accessed query results in memory to reduce repeated database calls on an e-commerce platform?

Accepted Answer

Redis or Memcached

Answer

In-memory caches like Redis or Memcached store query results (e.g., product listings, category menus) in RAM so repeat requests are served in microseconds without hitting the database.

E-Commerce Development Practice Test

E-Commerce Development Practice Test

E-Commerce Development E-Commerce Development Performance Optimization 2