CCA-410 Exam Questions

Your cluster has 9 slave nodes. The cluster block size is set to 128 MB and it's replication factor set to three. How will the hadoop framework distribute block writes from a reduc...

How do you access the long messages a mapreduce application generates after you run it on your cluster?

What does each block of a file contain where it is return into HDFS?

Which two occur when individual blocks are returned to DATANODE on a cluster local filesystem?

Once a client application validates its identity and is granted access to file in a cluster. What is the reminder of read path back to the client?

Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?

What is the smallest number of slave nodes you would need to configure in your hadoop cluster to store 100TB of data, using Hadoop default replication values, on nodes with 10TB of...

When planning a hadoop cluster, what general rule governs the hardware requirements between master nodes and slave nodes?

A slave node in your cluster has 24GB of Ram and 12 physical processor cores on hyper threading-enabled processor. You set the value of mapped. child.java.opts to -Xmx1G, and the v...

A client application opens a file write stream on your cluster. Which two metadata changes occur during a file write?

Each slave node in your cluster has four 2 TB hard drives installed (4x2TB). You set a value of the dfs.du.datanode.received parameter to 100GB on each slave node. How does this al...

What are the permissions of a file in HDFS with the following:rw-rw-r-x?

You configure your hadoop cluster with mapreduce V1 (MRv1) along with HDFS high availability (HA) Quorum-based storage. On which nodes should you configure and run your journal nod...

Which three file actions can execute as you write a file into HDFS?

You set the value of dfs.block.size to 64MB in hdfs-site.xml on a client machine, but you set the same property to 128MB on your clusters name node. What happens when the client wr...

You set mapred.tasktracker.reduce.tasks.maximum to a value of 4 on a cluster running mapreduce v1 (MRv1). How many reducers will run for any given job?

You configure your hadoop development cluster with both mapreduce frameworks, mapreduceV1 (MRv1) and mapreduce v2 (MRv2/YARN). You plan to run only one set of mapreduce daemons at...

Using hadoop's default settings, how much data will be able to store on your hadoop cluster if it is has 12 nodes with 4TB raw diskspace per node allocated to HDFS storage?

When requesting a file, how does HDFS retrieves the blocks associated with that file?

What four functions do scheduling algorithms perform on hadoop cluster?

What happens when a map task crashes while running a mapreduce job?

Which two updates occur when a client application opens a stream to begin a file write on a cluster running MapReduce v1 (MRv1)?

For a MapReduce job, on a cluster running MapReduce v1 (MRv1), what's the relationship between tasks and task templates?

What action occurs automatically on a cluster when a DataNode is marked as dead?

How does the NameNode know DataNodes are available on a cluster running MapReduce v1 (MRv1)

Which three distcp features can you utilize on a Hadoop cluster?

How does HDFS Federation help HDFS Scale horizontally?

Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

What two processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all...

Identify the function performed by the Secondary NameNode daemon on a cluster configured to run with a single NameNode.

You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an erro...

What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?

You configure you cluster with HDFS High Availability (HA) using Quorum-Based storage. You do not implement HDFS Federation. What is the maximum number of NameNodes daemon you shou...

You observe that the number of spilled records from map tasks for exceeds the number of map output records. You child heap size is 1 GB and your io.sort.mb value is set to 100MB. H...

Choose three reasons why should you run the HDFS balancer periodically?

What additional capability does Ganglia provide to monitor a Hadoop?

In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:

Where does a MapReduce job store the intermediate data output from Mappers?

Which two features does Kerberos security add to a Hadoop cluster?

Identify the daemon that performs checkpoint operations of the namespace state in a cluster configured with HDFS High Availability (HA) using Quorum based-storage?

Your existing Hadoop cluster has 30 slave nodes, each of which has 4 x 2T hard drives. You plan to add another 10 nodes. How much disk space can your new nodes contain?

Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFS default block size to 64MB?

Which three processes does HDFS High Availability (HA) enable on your cluster?