L&T Technology Services Hadoop Administrator Interview Questions and Answers

Big data refers to large volumes of structured and unstructured data that is too complex for traditional data processing applications.

• Big data is characterized by the 3 Vs - volume, velocity, and variety.

• Volume refers to the sheer amount of data being generated, often in terabytes or petabytes.

• Velocity refers to the speed at which data is being generated and processed, often in real-time.

• Variety refers to the different...read more

I will identify and delete unnecessary files, compress data, and optimize storage to free up space.

• Identify and delete unnecessary files and logs

• Compress data to save space

• Optimize storage by removing temporary files or old backups

The command for checking live processes on a local level is 'ps'

• Use the 'ps' command to display information about currently running processes

• Add options like 'aux' to show more detailed information

• Use 'grep' to filter the output for specific processes

NACL is a stateless firewall that controls traffic at the subnet level, while security groups are stateful firewalls that control traffic at the instance level.

• NACL operates at the subnet level, while security groups operate at the instance level.

• NACL is stateless, meaning it does not keep track of the state of connections, while security groups are stateful and keep track of connections.

• NACL rules are evaluated in ord...read more