Azure Fundamentals (AZ-900) interview questions

Renting compute, storage and services over the internet, paying for what you use instead of owning hardware.

IaaS gives virtual machines and networks. PaaS gives a managed platform to run apps. SaaS is complete software like Microsoft 365.

The provider secures the cloud infrastructure; you secure your data, identities and configuration. Your share depends on IaaS, PaaS or SaaS.

Public is shared provider infrastructure, private is dedicated to one organisation, hybrid combines both.

Scalability is the ability to add resources. Elasticity is adding and removing them automatically with demand.

A region is a geographic area with data centres. Availability zones are separate data centres within a region for high availability.

A logical container for related resources that share a lifecycle, permissions and tags.

A subscription is a billing and access boundary. Management groups organise many subscriptions for governance.

Azure's cloud identity service (formerly Azure AD) for users, groups, sign-in and app access.

MFA requires a second proof of identity. Conditional Access applies rules like requiring MFA from unknown locations.

Role-based access control: assigning roles like Reader or Contributor at a scope such as a resource group.

Never trust, always verify: verify explicitly, use least privilege and assume breach.

LRS (one data centre), ZRS (across zones), GRS and GZRS (copy to a second region).

Hot for frequent access, Cool and Cold for less frequent, Archive for rarely accessed data with retrieval delay.

Rules that enforce standards, like allowed regions or required tags, and report compliance.

CanNotDelete or ReadOnly locks that prevent accidental changes to important resources.

Pricing calculator and TCO calculator for estimates, Cost Management with budgets and alerts for control.

A service that collects metrics and logs from resources, with alerts and dashboards.

Azure Resource Manager deploys resources. Bicep is a simpler language for writing ARM templates as code.

Microsoft's uptime commitment for a service, like 99.9 percent. Using multiple zones or regions can raise availability.