- What is a NameNode and what is its role in HDFS?
- What is a DataNode and what is its role in HDFS?
- What is a Block in HDFS and what is its default size?
- What is MapReduce and how does it work in Hadoop?
- What is a JobTracker in Hadoop and what is its role?
- What is a TaskTracker in Hadoop and what is its role?
- What is the difference between a NameNode and a Secondary NameNode?
- What are the different components of Hadoop?
- What is the use of Hadoop streaming?
- What is the difference between InputSplit and Block in Hadoop?
- What is the role of the Combiner in MapReduce?
- What is the role of the Partitioner in MapReduce?
- What is Hadoop's default port numbers for the NameNode and JobTracker?
- What is Hadoop's configuration file and what is its role?
- How do you monitor Hadoop?
- What is the role of the Rack Awareness feature in Hadoop?
- What are the benefits of using Hadoop?
- What is the difference between Hadoop 1 and Hadoop 2?
- What is a SequenceFile in Hadoop?
- What is the role of the Hadoop Fair Scheduler?
- What is the use of Hadoop archives?
- What is the role of the Hadoop Credential Provider API?
- What is the use of the Hadoop Distributed Cache?
- What is the role of the Hadoop Security framework?
- How does Hadoop differ from traditional database systems like Oracle and MySQL?
- What is the Hadoop ecosystem and how does it relate to Hadoop?
- Can you explain the different types of Hadoop clusters and how they work?
- What is the difference between structured and unstructured data and how is Hadoop useful for processing both?
- How does Hadoop store data and what are the different storage formats available in Hadoop?
- What are the different Hadoop distributions available and how do they differ from each other?
- What is the role of Hadoop streaming in processing data in Hadoop?
- How do you handle errors and failures in Hadoop? Can you explain the fault tolerance mechanisms in Hadoop?
- What is the role of Hadoop ZooKeeper and how does it work?
- How do you implement data security in Hadoop?
- What is the difference between a Local File System and HDFS?
- What is a NameNode Federation and what is its use?
- What is Hadoop YARN and how does it work?
- What is a Container in Hadoop YARN and what is its role?
- What is the difference between a Hadoop job and a Hadoop task?
- What is a MapReduce Combiner and what is its use?
- What is the role of the Job History Server in Hadoop?
- What is the Hadoop RPC Protocol and what is its role?
- What is the use of the Hadoop Crypto module?
- What is Hadoop's speculative execution and how does it work?
- What is the role of the Hadoop Trash feature?
- What is the use of Hadoop InputFormat and OutputFormat?
- What is the Hadoop archive format and what is its use?
- What is the Hadoop Distributed File System Federation (HDFS Federation)?
- What is the role of the Hadoop Resource Manager?
- What is the difference between a Mapper and a Reducer in Hadoop?
- Can you explain the different Hadoop processing modes and how they differ from each other?
- How do you configure and tune Hadoop performance for specific workloads?
- Can you explain the Hadoop deployment models and how they affect the Hadoop architecture?
- How do you perform data preprocessing and cleaning in Hadoop? Can you explain the different techniques and tools used for the same?
- Can you explain the differences between Hadoop and Apache Spark in terms of data processing and analysis?
- How do you handle data replication in Hadoop? Can you explain the different replication strategies and their benefits?
- Can you explain the differences between Hadoop and traditional data warehousing systems in terms of data processing and analysis?
- What is the role of Hadoop Hive and how does it work?
- How do you handle large-scale data storage and retrieval in Hadoop? Can you explain the different techniques and tools used for the same?
- Can you explain the differences between Hadoop and cloud-based Big Data platforms like AWS EMR, Google Dataproc, etc.?
- How do you configure Hadoop's High Availability (HA) feature? What are the steps involved?
- What are the different authentication mechanisms available in Hadoop? Which one would you choose and why?
- Can you explain the differences between Apache Hadoop and Cloudera Hadoop?
- How do you handle large-scale data processing in Hadoop? Can you explain the design patterns and best practices to be followed?
- What are the key challenges that you have faced while working on Hadoop projects? How did you overcome those challenges?
- How do you optimize Hadoop jobs for performance? Can you explain the techniques and tools used for the same?
- How do you design a fault-tolerant architecture for Hadoop? What are the considerations to be taken care of?
- Can you explain the different types of data serialization techniques used in Hadoop?
- How do you implement Hadoop security? Can you explain the different components and features of Hadoop security?
- How do you monitor Hadoop clusters? Can you explain the different tools and techniques used for the same?
- What are the different types of Hadoop schedulers available? Can you explain the differences between them?
- Can you explain the differences between MapReduce and Spark? When would you prefer one over the other?
- How do you perform data backup and recovery in Hadoop? Can you explain the different techniques and tools used for the same?
- How do you handle Hadoop upgrade and migration? What are the best practices to be followed?
- Can you explain the differences between Hadoop and NoSQL databases like MongoDB, Cassandra, etc.?
- How do you handle data skew in Hadoop? Can you explain the techniques and tools used for the same?
- Can you explain the differences between Hadoop and traditional data warehousing systems like Teradata, Oracle, etc.?
- How do you perform data cleansing and transformation in Hadoop? Can you explain the techniques and tools used for the same?
- How do you design a scalable Hadoop architecture? Can you explain the different considerations and best practices to be followed?
- Can you explain the differences between Hadoop and cloud-based Big Data platforms like AWS EMR, Google Dataproc, etc.?
- How do you handle large-scale machine learning tasks in Hadoop? Can you explain the techniques and tools used for the same?
- How do you implement Hadoop data governance? Can you explain the different components and features of Hadoop data governance?
- Can you explain the differences between Hadoop and traditional ETL (Extract, Transform, Load) systems?
- How do you implement Hadoop data lineage? Can you explain the different components and features of Hadoop data lineage?
- Can you explain the differences between Hadoop and graph databases like Neo4j, OrientDB, etc.?
- Can you explain the role of Hadoop HBase in storing and retrieving large-scale data?
- How do you implement real-time data processing and analysis in Hadoop? Can you explain the different techniques and tools used for the same?
- Can you explain the differences between Hadoop and in-memory databases like SAP HANA, Oracle TimesTen, etc.?
- What is the role of Hadoop Pig and how does it work?
- How do you implement data governance in Hadoop? Can you explain the different components and features of Hadoop data governance?
- Can you explain the differences between Hadoop and graph databases in terms of data processing and analysis?
- How do you handle large-scale machine learning tasks in Hadoop? Can you explain the different techniques and tools used for the same?
- Can you explain the differences between Hadoop and traditional ETL (Extract, Transform, Load) systems in terms of data processing and analysis?
- How do you implement Hadoop data lineage and metadata management? Can you explain the different components and features of Hadoop data lineage?
- What is the role of Hadoop Oozie and how does it work?