The different configuration files in Hadoop are –
core-site.xml – This configuration file contains Hadoop core configuration settings, for example, I/O settings, very common for MapReduce and HDFS. It uses hostname a port.
mapred-site.xml – This configuration file specifies a framework name for MapReduce by setting mapreduce.framework.name
hdfs-site.xml – This configuration file contains HDFS daemons configuration settings. It also specifies default block permission and replication checking on HDFS.
yarn-site.xml – This configuration file specifies configuration settings for ResourceManager and NodeManager.
Posted Date:- 2021-10-21 10:00:21
Describe how gradient augmentation works.
Tell me how to randomly select a sample from a population of product users.
What is the bias-variance tradeoff?
Explain the process of spilling in MapReduce.
What is the Hierarchical Clustering Algorithm?
What is speculative execution in Hadoop?
How much data is enough to get a valid outcome?
How do you transform unstructured data into structured data?
What are the components of the architecture of Hive?
What do you mean by WAL in HBase?
What is the main difference between Sqoop and distCP?
How will you define checkpoints?
Define Active and Passive Namenodes.
What types of biases can happen through sampling?
Is there any way to change the replication of files on HDFS after they are already written to HDFS?
What is the significance of Sqoop’s eval tool?
What is a block in Hadoop Distributed File System (HDFS)?
What do you know about collaborative filtering?
What happens when multiple clients try to write on the same HDFS file?
Why is HDFS only suitable for large data sets and not the correct tool to use for many small files?
How Is Hadoop CLASSPATH essential to start or stop Hadoop daemons?
What is the goal of A/B Testing?
How are Big Data and Data Science related?
Define DataNode. How does NameNode tackle DataNode failures?
What will happen with a NameNode that doesn’t have any data?
Explain the process that overwrites the replication factors in HDFS.
What is the standard path for Hadoop Sqoop scripts?
What is the use of jps command in Hadoop?
What are the different configuration files in Hadoop?
What is Distributed Cache in a MapReduce Framework
What are the different file formats that can be used in Hadoop?
What are the steps to achieve security in Hadoop?
What is the need for Data Locality in Hadoop?
Name the common input formats in Hadoop.
Explain Rack Awareness in Hadoop.
What is the difference between data mining and data profiling?
Name some outlier detection techniques.
How do you convert unstructured data to structured data?
Explain Persistent, Ephemeral and Sequential Znodes.
How can you skip bad records in Hadoop ?
Mention the main configuration parameters that has to be specified by the user to run MapReduce.