Big Data Analytics
Quiz by rashmi theertha
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- Q1
Which term describes the growth rate of data in the IoT?
linear
exponential
cyclical
uniform
30s - Q2
Choose the example of unstructured data?
SQL queries
video content
customer account spreadsheet
user account data
30s - Q3
What is HDFS?
Storage layer
All of the above
Batch processing engine
Resource management layer
30s - Q4
Which among the following command is used to copy a directory from one node to another in HDFS?
dcp
rcp
drcp
distcp
30s - Q5
Which among the following is the correct statement
Datanode manage file system namespace
All of the above
NameNode stores actual data
Namenode stores metadata
30s - Q6
What is default replication factor?
2
3
4
1
30s - Q7
The namenode knows that the data node is active using a mechanism known as
h-signal
Data pulse
Active pulse
Heartbeats
30s - Q8
What is the default size of HDFS Data Block?
64MB
32MB
128MB
16MB
30s - Q9
What is HDFS Block in Hadoop?
It is the logical representation of data
Both the above
None of the above
It is the physical representation of data
30s - Q10
Which of the following is the correct statement?
Each incoming file is broken into 32 MB by default
NameNode stores user data in the form of Data Blocks
DataNode is the slave/worker node and holds the user data in the form of Data Blocks
None of the above
30s - Q11
The need for data replication can arise in various scenarios like
Data Blocks get corrupted
All of the above
DataNode goes down
Replication Factor is changed
30s - Q12
A file in HDFS that is smaller than a single block size
Occupies only the size it needs and not the full block
Occupies the full block's size.
Can span over multiple blocks
Cannot be stored in HDFS
30s - Q13
For the frequently accessed HDFS files the blocks are cached in
The memory of the data node
In the memory of the namenode
Both the above
30s - Q14
Which scenario demands highest bandwidth for data transfer between nodes
Data on the same node.
Nodes in different data centers
Different nodes on the same rack
Nodes on different racks in the same data center.
30s - Q15
When a client contacts the namenode for accessing a file, the namenode responds with
Block ID of the file requested
Size of the file requested
Block ID and hostname of all the data nodes containing that block
30s