PwC Devops Engineer Interview Questions and Answers

Persistent volume is a storage volume that exists beyond the life cycle of a container.

• Persistent volumes are used to store data that needs to persist even if the container is deleted or recreated.

• They are decoupled from the container and can be attached to different containers.

• Examples include network-attached storage (NAS), cloud storage, and local storage.

• Persistent volumes are managed by the storage administrator r

PersistentVolumes (PVs) in Kubernetes can be attached and detached.

• PersistentVolumes (PVs) can be attached to pods using PersistentVolumeClaims (PVCs).

• PVs can be detached from pods when no longer needed.

• Examples of PV types include NFS, iSCSI, and AWS EBS.

Merging 2 sorted arrays into a single sorted array.

• Create a new array to store the merged array

• Compare the first elements of both arrays and add the smaller one to the new array

• Repeat until one of the arrays is empty, then add the remaining elements of the other array

• Return the merged array

Objects in Kubernetes service include pods, services, endpoints, and namespaces.

• Pods: Basic unit of deployment in Kubernetes, consisting of one or more containers.

• Services: Abstraction that defines a logical set of pods and a policy by which to access them.

• Endpoints: Dynamically updated list of IP addresses and ports for pods backing a service.

• Namespaces: Virtual clusters within a Kubernetes cluster, used to divide clu

You can connect between 2 EC2 instances by using their private IP addresses or public DNS names.

• Use private IP addresses for communication within the same VPC

• Use public DNS names for communication across different VPCs or over the internet

Connections between public and private subnets are established using a NAT gateway or a NAT instance.

• Use a NAT gateway to allow instances in a private subnet to initiate outbound traffic to the internet while preventing inbound traffic from reaching those instances.

• Alternatively, use a NAT instance with a security group that only allows inbound traffic from instances in the public subnet.

• Ensure that the route tables fo...read more