Cloudera Certified Administrator for Apache Hadoop (CCAH)

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Cloudera Certified Administrator for Apache Hadoop (CCAH)

You have been asked to add a key to an existing keychain. You issue the following commands to enter key chain key configuration mode:

RouterA(config)#key chain chain1
RouterA(configkeychain)#key 2
RouterA(configkeychainkey)#keystring key2

The new key should be valid for three hours, and the router should begin sending the key at 9 a.m. on January 13, 2015. Which of the following commands should you issue next to achieve your goal? (Select the best answer.)

You can specify new queue name when user submits a job and new queue can be created dynamically if the property yarn.scheduler.fair.allow-undecleared- pools = true

✘

Yarn.scheduler.fair.user.fair-as-default-queue = false and yarn.scheduler.fair.allow- undecleared-pools = true

✘

You can specify new queue name when user submits a job and new queue can be created dynamically if yarn .schedule.fair.user-as-default-queue = false

✘ You can specify new queue name per application in allocations.xml file and have new jobs automatically assigned to the application queue ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which of the following can be mitigated by installing a personal firewall on a laptop? (Select the best answer.)

25GB on each hard drive may not be used to store HDFS blocks ✘ 100GB on each hard drive may not be used to store HDFS blocks ✘ All hard drives may be used to store HDFS blocks as long as at least 100 GB in total is available on the node ✘ A maximum if 100 GB on each hard drive may be used to store HDFS blocks ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

When a switch is configured with private VLANs, which of the following ports can an isolated port communicate with? (Select the best answer.)

Without creating a dfs.hosts file or making any entries, run the commands hadoop.dfsadmin- refreshModes on the NameNode ✘ Restart the NameNode ✘

Creating a dfs.hosts file on the NameNode, add the worker Node's name to it, then issue the command hadoop dfsadmin refresh Nodes = on the Namenode

✘ Nothing; the worker node will automatically join the cluster when NameNode daemon is started ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which of the following statements is not true regarding the IaaS service model? (Select the best answer.)

The file will remain under-replicated until the administrator brings that node back online ✘ The cluster will re-replicate the file the next time the system administrator reboots the NameNode daemon (as long as the file's replication factor doesn't fallbelow) ✘ This will be immediately re-replicated and all other HDFS operations on the cluster will halt until the cluster's replication values are resorted ✘ The file will be re-replicated automatically after the NameNode determines it is under- replicated based on the block reports it receives from the NameNodes ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which of the following emailrelated FirePOWER preprocessors can extract and decode attachments in clienttoserver traffic? (Select the best answer.)

The write succeeds, overwriting foo.txt in HDFS with no warning The file is uploaded and stored as a plain file named input You get a warning that foo.txt is being overwritten You get an error message telling you that foo.txt already exists, and asking you if you would like to overwrite it. You get a error message telling you that foo.txt already exists. The file is not written to HDFS

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which of the following authentication methods is not used with OSPFv3? (Select the best answer.)

They must be formatted as HDFS ✘ They must be formatted as either ext3 or ext4 ✘ They may be formatted in any Linux file system ✘ They must not be formatted - - HDFS will format the file system automatically ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You have configured a Cisco Catalyst switch to store its binding table on a local TFTP server. Which of the following commands can you issue to verify the URL that the agent will use to store the binding table on the TFTP server? (Select the best answer.)

Configure yarn.applicationmaster.resource.memory-mb and
yarn.applicationmaster.resource.cpu-vcores so that ApplicationMaster container allocations match the capacity you require. ✘ You don't need to configure or balance these properties in YARN as YARN dynamically balances resource management capabilities on your cluster ✘ Configure mapred.tasktracker.map.tasks.maximum andmapred.tasktracker.reduce.tasks.maximum ub yarn-site.xml to match your cluster's capacity set by the yarn-scheduler.minimum-allocation ✘ Configure yarn.nodemanager.resource.memory-mb and yarn.nodemanager.resource.cpu- vcores to match the capacity you require under YARN for eachNodeManager ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You have configured a CoPP policy to mitigate the effects of DoS attacks on the router. Which of the following packet types does the CoPP policy affect? (Select the best answer.)

HDFS is almost full ✘ The NameNode goes down ✘ A DataNode is disconnected from the cluster ✘ Map or reduce tasks that are stuck in an infinite loop ✔ MapReduce jobs are causing excessive memory swaps ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which of the following is the most likely reason for an organization to implement an extranet? (Select the best answer.)

It only keeps track of which NameNode is Active at any given time ✘ It monitors an NFS mount point and reports if the mount point disappears ✘ It both keeps track of which NameNode is Active at any given time, and manages the Edits file. Which is a log of changes to the HDFS filesystem ✘ If only manages the Edits file, which is log of changes to the HDFS filesystem ✔ Clients connect to ZooKeeper to determine which NameNode is Active ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

Which of the following is the default connection profile that is applied to clientless SSL VPN connections? (Select the best answer.)

nn02 is fenced, and nn01 becomes the active NameNode ✘ nn01 is fenced, and nn02 becomes the active NameNode ✘ nn01 becomes the standby NameNode and nn02 becomes the active NameNode ✘ nn02 becomes the standby NameNode and nn01 becomes the active NameNode ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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