面试题与答案

Cloud computing is a technology that allows users to access and use computing resources (such as servers, storage, databases, networking, software) over the internet instead of owning and maintaining them locally.

The three main service models of cloud computing are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

Elasticity in cloud computing refers to the ability to dynamically allocate and deallocate resources based on demand. It allows for automatic scaling of resources to handle varying workloads.

A load balancer distributes incoming network traffic across multiple servers to ensure even resource utilization and high availability. It enhances the performance and reliability of applications.

Auto Scaling is a feature that automatically adjusts the number of compute resources in a cloud environment based on demand. It ensures optimal performance without manual intervention.

A VPC provides a logically isolated section of the cloud where you can launch resources. It allows you to define your own network environment with IP address ranges, subnets, and route tables.

IAM controls access to cloud resources by managing user identities, permissions, and authentication. It ensures that only authorized users have access to specific resources.

A CDN is a system of distributed servers that deliver web content to users based on their geographic location. It improves website performance, reduces latency, and enhances user experience.

A server farm is a group of interconnected servers used to provide computing resources. It is designed to ensure high availability, reliability, and scalability for applications and services.

A Key Vault is a secure storage area for cryptographic keys and secrets. It provides centralized management of sensitive information and helps in secure key access and storage.

DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) to shorten the software development life cycle. Cloud computing provides an ideal platform for implementing DevOps practices.

Serverless computing is a cloud computing execution model where the cloud provider dynamically manages the infrastructure. It is advantageous for applications with variable workloads as users are only charged for actual usage.

A Network Security Group is a set of rules that control the inbound and outbound traffic to network interfaces (VMs, load balancers) in Azure. It acts as a basic firewall for controlling traffic flow.