CDN concept and usage in HLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main purpose of a CDN.

HLD

A CDN primarily helps to [1] content closer to users.

Drag options to blanks, or click blank then click option'

Aencrypt

Bdelete

Ccache

Dcompress

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing caching with deleting content.

Thinking CDN encrypts content by default.

A CDN caches content on servers near users to reduce latency and improve load times.

2fill in blank

medium

Complete the code to show what a CDN reduces in network communication.

HLD

A CDN reduces [1] between the user and the origin server.

Drag options to blanks, or click blank then click option'

Asecurity

Bbandwidth

Cerrors

Dlatency

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing bandwidth with latency.

Thinking CDNs reduce security risks directly.

CDNs reduce latency by serving content from nearby servers instead of the origin server far away.

3fill in blank

hard

Fix the error in the description of CDN edge servers.

HLD

Edge servers in a CDN are located [1] the origin server to serve content faster.

Drag options to blanks, or click blank then click option'

Aclose to

Bfar from

Cinside

Dbehind

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming edge servers are far from users.

Confusing edge servers with origin servers.

Edge servers are placed close to users, far from the origin server, to reduce latency.

4fill in blank

hard

Fill both blanks to complete the CDN request flow.

HLD

User requests content → DNS directs to [1] → [2] serves cached content if available.

Drag options to blanks, or click blank then click option'

Aedge server

Borigin server

CCDN

Dload balancer

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing origin server with edge server in DNS routing.

Thinking load balancer serves cached content directly.

The DNS directs the user to the edge server, which is part of the CDN and serves cached content.

5fill in blank

hard

Fill all three blanks to complete the CDN benefits list.

HLD

CDNs improve [1], reduce [2], and increase [3] for websites.

Drag options to blanks, or click blank then click option'

Aperformance

Blatency

Cavailability

Dcost

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up latency and availability.

Thinking CDNs primarily reduce cost.

CDNs improve performance, reduce latency, and increase availability by distributing content globally.