Vserv Infosystems IT Administrator Interview Questions and Answers

Answers to questions related to Docker, AWS firewall types, and ELK Stack

• To create a Docker file, start with a base image and add necessary dependencies and configurations

• AWS has two types of firewalls: Network ACLs and Security Groups

• ELK Stack is a combination of Elasticsearch, Logstash, and Kibana used for log management and analysis

JMS and queues can be configured by defining connection factories, destinations, and message listeners.

• Define a connection factory for the JMS provider

• Define a destination (queue or topic) for sending and receiving messages

• Configure message listeners to receive and process messages

• Example: In Apache ActiveMQ, create a connection factory and queue using the web console or configuration files

• Example: In Spring Boot, conf...read more

Thread dump can be taken using various tools and commands.

• Using jstack command in Java

• Using kill -3 command in Unix/Linux

• Using VisualVM tool

• Using Eclipse MAT tool

• Thread dump can help in identifying thread deadlock and performance issues