Cloud Infrastructure Flashcards

Which cloud storage class is MOST cost-effective for data that is accessed less than once per year?

Answer: Archive/Glacier storage

Archive storage (e.g., AWS Glacier) offers the lowest cost for data that is rarely accessed, at the expense of higher retrieval latency.

In cloud networking, what does a VPC (Virtual Private Cloud) primarily provide?

Answer: An isolated virtual network segment within the public cloud

A VPC gives users a logically isolated section of the cloud where they can launch resources in a defined virtual network.

Which autoscaling policy adds or removes instances based on a scheduled time rather than real-time metrics?

Answer: Scheduled scaling

Scheduled scaling adjusts capacity at predetermined times, useful for known traffic patterns like business-hours spikes.

What is the purpose of a cloud region's Availability Zone (AZ)?

Answer: To provide isolated data centers within a region for fault tolerance

Availability Zones are physically separate data centers within a region, designed so failures in one AZ don't affect others.

A developer deploys an application that needs to store user session data accessible by multiple app servers. Which cloud service type is BEST suited?

Answer: In-memory distributed cache (e.g., Redis)

An in-memory distributed cache like Redis provides fast, shared session storage accessible across multiple application servers.

Which concept describes the cloud provider's responsibility versus the customer's responsibility for security?

Answer: Shared responsibility model

The shared responsibility model defines which security tasks the cloud provider handles (physical, hypervisor) versus the customer (OS, application, data).

What does 'elasticity' mean in cloud computing?

Answer: Automatic scaling of resources up or down to match demand

Elasticity refers to the cloud's ability to automatically provision and release resources in near-real-time based on workload demand.