+100 Cloudera certification preparation questions : CCDH ( edition 2 )

+100 Cloudera certification preparation questions : CCDH ( edition 2 )

+100 Cloudera certification preparation questions : CCDH ( edition 2 )

+100 Cloudera certification preparation questions : CCDH ( edition 2 )

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Because Name node is Single Point of Failure in HDFS, following recommendation on the hardware is done :

Storage: Raid

Ram: 32GB and Upwards

Processors Cores: 16 and upwards

Networking: Multiple ports/10 GB bandwidth to switch.

  • True
  • False

For each input key-value pair, mapper can emit:

  • As many intermediate key-value pair as desired with no restriction on data type, i.e., key and value pairs can be heterogeneous.
  • As many intermediate key-value pair as desired, but they cannot be of the same type and the input key value pair.
  • As many intermediate key-value pair as desired, but they have to be of the same type as the input key value pair.
  • Only one key value pair of any type.
  • As many intermediate key-value pair as designed, as long as all the keys have the same type and all the values have the same type.

You copy a 32 MB file on HDFS and the default block size of your HDFS is 64 MB.

It would occupy the complete Block size of 64 MB on the storage.

  • True
  • False

In case of speculative execution, copy of a poorly performing task is launched. Which of the following is true:

  • The speculative task would be killed before completion.
  • The original task would be killed before completion.
  • The one that finishes first would be taken for result and the other one would be killed.
  • Both the tasks would be allowed to run till completion.

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+100 Cloudera certification preparation questions : CCDH ( edition 2 )

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