The data node and name node in HADOOP are
Worker Node and Master Node respectively
In HDFS, the DataNode is a worker that stores and serves data blocks. The NameNode is the master that manages filesystem metadata and block locations. Thus the order is worker node, master node.
Important Questions from Big Data
Arrange the following steps of the Map reduce framework
A. Input Splitting
B. Reducing
C. Mapping
D. Shuffling & Sorting
Choose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: HDFS follows a master-slave architecture with Name Node and Data Nodes.
Reason R: Name Node stores metadata, while Data Nodes store actual data blocks.
In the light of the above statements, choose the most appropriate answer from the options given below
Which statements are true?
(i) Facebook’s engineering article Moving an Elephant, published on 27 July 2011, reports that in 2010 Facebook had the world’s largest Hadoop cluster, with over 20 PB of storage.
(ii) In Hadoop 2.x, YARN separates cluster resource management from application-specific execution coordination; YARN itself is not a live-stream processing engine.
Which of the following statement(s) is/are correct regarding On-Line Transaction Processing (OLTP)?
I. Responses to the user inquiry are immediate.
II. The associated cost is economical with efficient utilization of resources.
III. The database is always up-to-date.
Match the LIST-I with LIST-II
LIST-I LIST-II A. Hadoop Distribution File System I. Trust B. Veracity II. Facebook C. Apache Pig III. Name-Node D. Apache Hive IV. Yahoo Choose the correct answer from the options given below:
