Cloudera Certified Developer for Apache Hadoop (CCDH) Set 1

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Cloudera Certified Developer for Apache Hadoop (CCDH) Set 1

Certain endpoints are missing DHCP profiling data. Which option describes what can be used to determine if DHCP requests from clients are reaching Cisco ISE?

Increase the parameter that controls minimum split size in the job configuration. ✘ Write a custom MapRunner that iterates over all key-value pairs in the entire file. ✘ Set the number of mappers equal to the number of input files you want to process. ✘ Write a custom FileInputFormat and override the method isSplitable to always return false. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which debug command on a Cisco WLC shows the reason that a client session was terminated?

The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close
() method.

✘ The TaskTracker spawns a new Mapper to process all records in a single input split. ✘ The TaskTracker spawns a new Mapper to process each key-value pair. ✘ The JobTracker spawns a new Mapper to process all records in a single file. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which RADIUS attribute is used primarily to differentiate an IEEE 802.1x request from a Cisco MAB request?

Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The programmer can configure in the job what percentage of the intermediate data should arrive before the reduce method begins. ✘ Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.The reduce method is called only after all intermediate data has been copied and sorted. ✘ Reduce methods and map methods all start at the beginning of a job, in order to provide optimalperformance for map-only or reduce-only jobs. ✘ Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.The reduce method is called as soon as the intermediate key-value pairs start to arrive. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which authorization method is the Cisco best practice to allow endpoints access to the Apple App store or Google Play store with Cisco WLC software version 7.6 or newer?

Yes, because the sum operation is both associative and commutative and the input and output types to
the reduce method match. ✘ No, because the sum operation in the reducer is incompatible with the operation of a Combiner. ✘ No, because the Reducer and Combiner are separate interfaces. ✘ No, because the Combiner is incompatible with a mapper which doesn't use the same data type forboth the key and value. ✔ Yes, because Java is a polymorphic object-oriented language and thus reducer code can be reused asa combiner. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which time allowance is the minimum that can be configured for posture reassessment interval?

TaskTracker ✘ NameNode ✘ DataNode ✘ JobTracker ✔ Secondary NameNode ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which advanced authentication setting is needed to allow an unknown device to utilize Central WebAuth?

HBase ✘ Hue ✘ Pig ✘ Hive ✔ Oozie ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which option restricts guests from connecting more than one device at a time?

They would see Hadoop throw an ConcurrentFileAccessException when they try to access this file. ✘ They would see the current state of the file, up to the last bit written by the command. ✘ They would see the current of the file through the last completed block. ✘ They would see no content until the whole file written and closed. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which statement about the Cisco ISE BYOD feature is true?

The number of values across different keys in the iterator supplied to a single reduce method call. ✘ The amount of intermediate data that must be transferred between the mapper and reducer. ✘ The number of input files a mapper must process. ✘ The number of output files a reducer must produce. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

What user rights does an account need to join ISE to a Microsoft Active Directory domain?

Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper. ✘ Place the data file in the DistributedCache and read the data into memory in the map method of themapper. ✘ Place the data file in the DataCache and read the data into memory in the configure method of themapper. ✘ Place the data file in the DistributedCache and read the data into memory in the configure method ofthe mapper. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

A network administrator must enable which protocol to utilize EAP-Chaining?

As many final key-value pairs as desired. There are no restrictions on the types of those key- value
pairs (i.e., they can be heterogeneous). ✘ As many final key-value pairs as desired, but they must have the same type as the intermediate key-value pairs. ✘ As many final key-value pairs as desired, as long as all the keys have the same type and all the valueshave the same type. ✘ One final key-value pair per value associated with the key; no restrictions on the type. ✔ One final key-value pair per key; no restrictions on the type. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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Cloudera Certified Developer for Apache Hadoop (CCDH) Set 1

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