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 Hive

Answer

Apache Sqoop

Answer

Apache Oozie

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

DataFrame only

Answer

SparkSession

Answer

Driver Program

Question 3

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

Accepted Answer

3

Answer

2

Answer

1

Answer

5

Question 4

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

Accepted Answer

Apache Parquet

Answer

CSV

Answer

JSON Lines

Answer

Apache Avro

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

Data is written back to HDFS for checkpointing

Answer

The input splits are recalculated based on data skew

Answer

Map output is compressed and archived before reduction

Question 6

Which CAP theorem property does Apache Cassandra primarily sacrifice to maintain high availability and partition tolerance?

Accepted Answer

Strong consistency

Answer

Availability

Answer

Partition tolerance

Answer

Durability