Cognizant Technical Lead Interview Questions, Process, and Tips

Terraform life cycle involves initialization, planning, applying, and destroying infrastructure.

• Terraform initializes by downloading providers and modules

• Planning phase creates an execution plan for infrastructure changes

• Apply phase executes the plan and makes changes to infrastructure

• Destroy phase removes all resources created by Terraform

• Terraform can also import existing infrastructure into its state

There is no limit to the number of EIPs that can be created for an AWS account.

• EIPs can be created and associated with instances in any region.

• However, there may be limits on the number of EIPs that can be used in a specific region.

• It is recommended to use Elastic Load Balancing or AWS Global Accelerator instead of EIPs for better scalability and availability.

Data sync replicates data across multiple databases while multi AZ provides high availability within a single region.

• Data sync is used for scaling read-heavy workloads and disaster recovery.

• Multi AZ is used for high availability and automatic failover within a single region.

• Data sync can be used across regions while multi AZ cannot.

• Data sync can be used with different database engines while multi AZ is specific to cert...read more

Kubernetes services are a way to expose a set of pods as a network service.

• Services provide a stable IP address and DNS name for a set of pods.

• They can load balance traffic across the pods.

• There are different types of services, such as ClusterIP, NodePort, and LoadBalancer.

• Services can also be used to connect to external services or databases.

• Example: A web application running in Kubernetes can use a service to connect

I have created various objects in Kubernetes such as pods, services, deployments, config maps, secrets, etc.

• Pods - smallest deployable units in Kubernetes

• Services - provides a stable IP address and DNS name for a set of pods

• Deployments - manages the deployment and scaling of a set of pods

• Config Maps - stores configuration data as key-value pairs

• Secrets - stores sensitive information such as passwords and API keys

• Ingres...read more