Hansen Technologies Interview Questions and Answers

Upgrading EKS involves updating the control plane and worker nodes to ensure compatibility and access to new features.

• Check Current Version: Use the AWS CLI command `aws eks describe-cluster --name <cluster-name>` to find the current version of your EKS cluster.

• Upgrade Control Plane: Execute `aws eks update-cluster-version --name <cluster-name> --kubernetes-version <new-version>` to upgrade the c...read more

To prevent application downtime, implement redundancy, monitoring, automation, and disaster recovery plans.

• Implement redundancy by using load balancers, multiple servers, and failover systems.

• Set up monitoring tools to detect issues proactively and alert the team.

• Automate processes like deployments, scaling, and backups to reduce human errors.

• Create disaster recovery plans with backups, replication, and failover s...read more

Iterate through a map and write code to perform operations on each key-value pair.

• Use a for loop to iterate through the map

• Access the key and value of each pair using the iterator

• Perform desired operations on the key-value pairs

Grep command is used to search for specific patterns in text files.

• Use 'grep' followed by the pattern you want to search for and the file name

• Use '-i' flag for case-insensitive search

• Use '-r' flag for recursive search in directories

• Use '-v' flag to invert the match and show lines that do not match the pattern

Interface defines a contract while Abstraction hides implementation details.

• Interface is a blueprint of a class that defines the methods and properties that the class should implement.

• Abstraction is a way of hiding the implementation details of a class and exposing only the necessary details to the user.

• Interface is used to achieve multiple inheritance in Java.

• Abstraction can be achieved through abstract classes a...read more

Collection hierarchy in Java refers to the relationship between different types of collections such as List, Set, and Map.

• Java collections framework includes interfaces like Collection, List, Set, and Map.

• List interface extends Collection interface and represents an ordered collection of elements.

• Set interface extends Collection interface and represents a collection of unique elements.

• Map interface represents a ma...read more