CLOUDERA CERTIFIED ADMINISTRATOR FOR APACHE
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space
allocated HDFS storage. Assuming Hadoop's default configuration, how much data will you
be able to store?
A) Approximately 10TB
B) Approximately 33 TB
C) Approximately 25TB
D) Approximately 100TB - CORRECT ANSWERS
The most important consideration for slave nodes in a Hadoop cluster running production
jobs that require short turnaround times is:
A) The ratio between the amount of memory and the total storage capacity
B) The ratio between the number of processor cores and number of disk drives
C) The ratio between the number of processor cores and total storage capacity
D) The ratio between the number of processor cores and the amount of memory
E) The ratio between the amount of memory and the number of disk drives - CORRECT
ANSWERS
Which three distcp features can you utilize on a Hadoop cluster?
A) Use distcp to copy data between directories inside the same cluster
B) Use distcp to copy HBase table files
C) Use distcp to run an internal MapReduce job to copy files
D) Use distcp to copy physical blocks from the source to the target destination in your cluster
E) Use distcp to copy files only between two clusters or more. You cannot use distcp to copy
data between directories inside the same cluster - CORRECT ANSWERS
Page 1 of 17
,CLOUDERA CERTIFIED ADMINISTRATOR FOR APACHE
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
You have a cluster running 32 slave nodes and 3 master nodes running mapreduce V1
(MRv1).
You execute the command: $ hadoop fsck /
What four cluster conditions running this command will return to you?
A) Blocks replicated improperly or that don't satisfy your cluster enhancement policy (e.g.,
too many blocks replicated on the same node)
B) Under-replicated blocks
C) The current state of the file system returned from scanning individual blocks on each
datanode
D) Number of datanodes
E) Number of dead datanodes
F) Configure capacity of your cluster
The current state of the file system according to the namenode
The location for every block - CORRECT ANSWERS
Your Hadoop cluster contains nodes in three racks. You have not configured the dfs.hosts
property in the NameNode's configuration file. What happens?
A) The NameNode will update the dfs.hosts property to include machines running the
DataNode daemon on the next NameNode reboot or with the command dfsadmin -
refreshNodes
B) No new nodes can be added to the cluster until you specify them in the dfs.hosts file
C) Any machine running the DataNode daemon can immediately join the cluster
D) Presented with a blank dfs.hosts property, the NameNode will permit DataNodes
specified in mapred.hosts to join the cluster - CORRECT ANSWERS
Page 2 of 17
, CLOUDERA CERTIFIED ADMINISTRATOR FOR APACHE
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
You suspect that your NameNode is incorrectly configured, and is swapping memory to disk.
Which Linux commands help you to identify whether swapping is occurring?
A) vmstat
B) free
C) swapinfo
D) top
E) df
F) memcat - CORRECT ANSWERS
Identify the daemon that performs checkpoint operations of the namespace state in a
cluster configured with HDFS High Availability (HA) using Quorum based-storage?
A) Standby NameNode
B) Secondary NameNode
C) CheckpointNode
D) NameNode
E) NodeManeger - CORRECT ANSWERS
Which two features does Kerberos security add to a Hadoop cluster?
A) Encryption for data on disk ("at rest")
B) Authentication for user access to the cluster against a central server
C) User authentication on all remote procedure calls (RPCs)
D) Encryption for data during transfer between the Mappers and Reducers
D) Root access to the cluster for users hdfs and mapred but non-root access for clients -
CORRECT ANSWERS
Page 3 of 17
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space
allocated HDFS storage. Assuming Hadoop's default configuration, how much data will you
be able to store?
A) Approximately 10TB
B) Approximately 33 TB
C) Approximately 25TB
D) Approximately 100TB - CORRECT ANSWERS
The most important consideration for slave nodes in a Hadoop cluster running production
jobs that require short turnaround times is:
A) The ratio between the amount of memory and the total storage capacity
B) The ratio between the number of processor cores and number of disk drives
C) The ratio between the number of processor cores and total storage capacity
D) The ratio between the number of processor cores and the amount of memory
E) The ratio between the amount of memory and the number of disk drives - CORRECT
ANSWERS
Which three distcp features can you utilize on a Hadoop cluster?
A) Use distcp to copy data between directories inside the same cluster
B) Use distcp to copy HBase table files
C) Use distcp to run an internal MapReduce job to copy files
D) Use distcp to copy physical blocks from the source to the target destination in your cluster
E) Use distcp to copy files only between two clusters or more. You cannot use distcp to copy
data between directories inside the same cluster - CORRECT ANSWERS
Page 1 of 17
,CLOUDERA CERTIFIED ADMINISTRATOR FOR APACHE
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
You have a cluster running 32 slave nodes and 3 master nodes running mapreduce V1
(MRv1).
You execute the command: $ hadoop fsck /
What four cluster conditions running this command will return to you?
A) Blocks replicated improperly or that don't satisfy your cluster enhancement policy (e.g.,
too many blocks replicated on the same node)
B) Under-replicated blocks
C) The current state of the file system returned from scanning individual blocks on each
datanode
D) Number of datanodes
E) Number of dead datanodes
F) Configure capacity of your cluster
The current state of the file system according to the namenode
The location for every block - CORRECT ANSWERS
Your Hadoop cluster contains nodes in three racks. You have not configured the dfs.hosts
property in the NameNode's configuration file. What happens?
A) The NameNode will update the dfs.hosts property to include machines running the
DataNode daemon on the next NameNode reboot or with the command dfsadmin -
refreshNodes
B) No new nodes can be added to the cluster until you specify them in the dfs.hosts file
C) Any machine running the DataNode daemon can immediately join the cluster
D) Presented with a blank dfs.hosts property, the NameNode will permit DataNodes
specified in mapred.hosts to join the cluster - CORRECT ANSWERS
Page 2 of 17
, CLOUDERA CERTIFIED ADMINISTRATOR FOR APACHE
HADOOP EXAM QUESTIONS AND ANSWERS UPDATED
2024/2025 A COMPLETE SOLUTION ALL ANSWERS
CORRECT DETAILED BEST GRADED A+ FOR SUCCESS
You suspect that your NameNode is incorrectly configured, and is swapping memory to disk.
Which Linux commands help you to identify whether swapping is occurring?
A) vmstat
B) free
C) swapinfo
D) top
E) df
F) memcat - CORRECT ANSWERS
Identify the daemon that performs checkpoint operations of the namespace state in a
cluster configured with HDFS High Availability (HA) using Quorum based-storage?
A) Standby NameNode
B) Secondary NameNode
C) CheckpointNode
D) NameNode
E) NodeManeger - CORRECT ANSWERS
Which two features does Kerberos security add to a Hadoop cluster?
A) Encryption for data on disk ("at rest")
B) Authentication for user access to the cluster against a central server
C) User authentication on all remote procedure calls (RPCs)
D) Encryption for data during transfer between the Mappers and Reducers
D) Root access to the cluster for users hdfs and mapred but non-root access for clients -
CORRECT ANSWERS
Page 3 of 17
