
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 ...