152 | Big Data Simplied
a. False
b. Error
c. True
d. None of the above
5. What is immutable in Spark?
a. Once created and assign a value, it’s
not possible to change, this property is
called immutability.
b. Spark is by default immutable, it does
not allow updates and modifications.
c. Data collection is not immutable, but
data value is immutable.
d. All the above
6. How Spark store the data?
a. Spark is a processing engine, there is no
storage engine.
b. It can retrieve data from any storage
engine, like HDFS, S3 and other data
resources.
c. Not applicable
d. Only a is true.
e. Both a and b are true.
7. What is the role of the ZooKeeper in Kafka?
a. Kafka uses Zookeeper to store offsets of
messages consumed for a specific topic
and partition by a specific Consumer
Group.
b. To maintain the Kafka cluster.
c. Zookeeper established the channel in
between producer and consumer.
d. All the above
8. Is it possible to use Kafka without
ZooKeeper?
a. Yes, it is possible.
b. It is possible if Kafka runs locally.
c. No, it is not possible to bypass
Zookeeper and connect directly to
the Kafka server. If, for some reason,
ZooKeeper is down, you cannot service
any client request.
d. Not applicable
9. What is RDD lineage?
a. Hive Spark does not support data rep-
lication in the memory and thus, if any
data is lost, then it is rebuilt using RDD
lineage.
b. RDD lineage is a process that recon-
structs lost data partitions. The best is
that RDD always remembers how to
build from other datasets.
c. Only a is true
d. Both a and b are true.
10. What is Spark Driver?
a. Spark Driver is the program that runs
on the master node of the machine and
declares transformations and actions on
data RDDs.
b. Driver in Spark creates SparkContext,
connected to a given Spark Master.
c. Driver also delivers the RDD graphs to
Master.
d. Only b and c are true.
e. All the above
Short-answer Type Questions (5 Marks Questions)
1. What is Apache Spark? Explain some key
features of Spark.
2. What are the benefits of Spark over
MapReduce? Please explain.
3. Can you use Spark to access and analyse
data stored in Cassandra databases? What
are the languages supported by Apache
Spark for developing big data applications?
4. Explain about the different cluster manag-
ers in Apache Spark.
5. Explain about the major libraries that con-
stitute the Spark ecosystem?
M06 Big Data Simplified XXXX 01.indd 152 5/17/2019 2:49:20 PM
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