DDI Questions

Question 1

What is terraform?

Answer 1

Infrastructure as Code (IaC) tools allow you to manage infrastructure with configuration files rather than through a graphical user interface.

Question 1

What are some advantages of Terraform?

Answer 1

1. Manage infrastructure on multiple cloud platforms
2. The human-readable configuration language helps you write infrastructure code quickly
3. Terraform’s state allows you to track resource changes throughout your deployments
4. You can commit your configurations to version control to safely collaborate on infrastructure

Question 2

Difference between CI and CD?

Answer 2

CI = build/test
CD = release/deploy

Question 3

What is a DNS server?

Answer 3

DNS server maps human readable URLs to the IP address of the server that hosts the site.

A recursive resolver will use the root server, a TLD name server and a authoritative server to get the IP address if it’s not already in the cache of your browser.

Question 4

What is the A record?

Answer 4

Address record maps the domain or sub domain to the IP address of its host. e.g google.com to IPv4 address 72.334.322.222.

Question 5

What is the difference between IPv4 and IPv6?

Answer 5

Longer, quicker and more secure

Question 6

What is the CNAME record?

Answer 6

A Canonical name record forwards a domain to another domain instead of an IP address.

Question 7

What is the NS record?

Answer 7

Name server record is a URL that the internet can ping to find our IP address. Almost always 2 of them for better reliability.

Question 8

What is load balancing?

Answer 8

Process of distributing network traffic across multiple servers to:
- increase application responsiveness
- reduce latency
- reduce strain on any one server
- makes servers more efficient

Question 9

What is latency?

Answer 9

Latency is the time it takes for data to pass from one point on a network to another.

High latency = bad