Indian Railways Technical Analyst Interview Questions and Answers

Alternative hypothesis is needed to test the validity of the null hypothesis and to provide an explanation for the observed results.

• Alternative hypothesis helps to determine if the observed results are due to chance or a real effect

• It provides an explanation for the observed results

• It helps to identify the direction of the effect

• It allows for the possibility of rejecting the null hypothesis

• Example: Null hypothesis - th...read more

Cluster analysis is a statistical technique used to group similar objects or data points into clusters.

• It is used in various fields such as marketing, biology, and social sciences.

• It involves identifying similarities and differences between data points and grouping them accordingly.

• There are different types of clustering algorithms such as hierarchical clustering and k-means clustering.

• Cluster analysis can be used for ...read more

Containerization is a lightweight, portable, and self-sufficient way to package applications and their dependencies.

• Create a Dockerfile with instructions on how to build the container

• Build the Docker image using the Dockerfile

• Run the Docker image to create a container

• Deploy the container on a server using Docker Engine

Elastic Kubernetes Service (EKS) is a managed Kubernetes service provided by AWS.

• Fully managed Kubernetes service

• Automatically scales based on workload

• Integrates with other AWS services like EC2, S3, and IAM

CloudWatch is a monitoring and management service provided by AWS to monitor resources and applications in the cloud.

• CloudWatch collects and tracks metrics, logs, and events from various AWS services and resources.

• It provides real-time monitoring, alerting, and dashboards to help users visualize and understand their cloud environment.

• Users can set up alarms to notify them of changes in their environment or resource usa...read more

Java 11 introduced several new features and enhancements compared to Java 8.

• Local-Variable Syntax for Lambda Parameters

• HTTP Client API (standardized in java.net.http package)

• Nest-Based Access Control

• Dynamic Class-File Constants

• Epsilon: A No-Op Garbage Collector

• Flight Recorder

• ZGC: A Scalable Low-Latency Garbage Collector