MS-DS Master of Data science FREE MS-DS Master of Data science Big Data Technologies Questions and Answers 2

Question 1

Which component of the Hadoop ecosystem is specifically designed for real-time stream processing of large-scale data?

Accepted Answer

Apache Storm

Answer

Apache Storm is a distributed real-time computation system designed for processing unbounded streams of data at scale.

Question 2

In Apache Spark, what is the primary abstraction for a distributed collection of items that can be processed in parallel?

Accepted Answer

RDD (Resilient Distributed Dataset)

Answer

RDD is Spark's fundamental data structure representing an immutable, partitioned collection of elements that can be operated on in parallel.

Question 3

What is the default replication factor for data blocks in a standard HDFS configuration?

Accepted Answer

3

Answer

HDFS defaults to a replication factor of 3, storing three copies of each data block across different nodes for fault tolerance.

Question 4

Which big data storage format uses columnar storage and is optimized for analytical queries in distributed systems?

Accepted Answer

Apache Parquet

Answer

Apache Parquet is a columnar storage format that enables efficient compression and encoding schemes, making it ideal for analytical workloads.

Question 5

In a MapReduce job, what happens during the shuffle and sort phase between the Map and Reduce stages?

Accepted Answer

Intermediate key-value pairs are grouped by key and transferred to reducer nodes

Answer

The shuffle and sort phase transfers mapper output across the network, grouping all values associated with the same key together before sending them to the appropriate reducer.

MS-DS Master of Data science Practice Test

MS-DS Master of Data science Practice Test

MS-DS Master of Data science FREE MS-DS Master of Data science Big Data Technologies Questions and Answers 2