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.
Both (i) and (ii)
Both (i) and (ii) are true. The Facebook claim is explicitly historical and attributed to the named engineering report, rather than asserted as a current ranking. Apache’s Hadoop 2.x documentation assigns global resource allocation to the ResourceManager and application-specific coordination to the ApplicationMaster. Stream-processing work requires an appropriate processing framework; YARN supplies resource management.
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 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.
Which of the following are database systems, rather than an in-memory object-caching system?
(A) Memcached
(B) CouchDB
(C) InfiniteGraphChoose the most appropriate answer from the options below.
The data node and name node in HADOOP are
