Cloudera Certified Administrator for Apache Hadoop
Practice Questions and Answers 2023 with complete
solution
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
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
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
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
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
,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
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
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
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
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
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
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
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
Practice Questions and Answers 2023 with complete
solution
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
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
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
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
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
,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
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
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
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
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
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
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
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
