SRM Institute of Science and Technology Business Technology Analyst Interview Questions and Answers

If a microservice goes down in microservices architecture, it can affect the entire system.

• Other microservices may not be able to communicate with the downed microservice.

• The system may experience latency or errors.

• Proper monitoring and redundancy can help mitigate the impact of a downed microservice.

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

• Kubernetes service provides a stable IP address and DNS name for a set of pods.

• It allows load balancing traffic across multiple pods.

• There are four types of Kubernetes services: ClusterIP, NodePort, LoadBalancer, and ExternalName.

• Example: A web application running on multiple pods can be exposed as a service using Kubernetes service.

Hashtable doesn't allow nulls because it uses the null value as a marker for empty slots.

• Hashtable uses null as a marker for empty slots, so allowing null values would cause ambiguity.

• Null keys are also not allowed in Hashtable for the same reason.

• To store null values, use a different data structure like HashMap or ConcurrentHashMap.