IBM Certified Data Architect - Big Data Certification Questions and Answers (Dumps and Practice Questions)

Question : Which of the following master component will take care of replicating data across the nodes in a Hadoop Cluster

1. Job Tracker

2. Edge Node

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4. Data Node

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Explanation: Files in HDFS are write-once and have strictly one writer at any time. The NameNode makes all decisions regarding replication of blocks. It periodically
receives a Heartbeat and a Blockreport from each of the DataNodes in the cluster. Receipt of a Heartbeat implies that the DataNode is functioning properly.






Question : Select the correct statement for the NameNode ?


1. NameNode daemon must be running at all the times
2. NameNode holds all its metadata in RAM for fast access.
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4. 1,2 and 3 are correct
5. 1 and 2 are correct



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Question : If a file which is MB how much space block space it will used ?

1. 33 MB
2. 64 MB
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4. None of the Above



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Although files are split into 64MB or 128 MBblocks, if a file is smaller than this the full
64 MB or 128 MB will not be used.

Related Questions

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Question : Which of the following responsibilities of JobTracker were splited in YARN architecture?


1. Resource Management
2. Job Monitoring
3. Data Distribution
4. 1 and 2
5. All 1, 2 and 3



Question : Which of the following is not supported in the BigInsight for HA ?



1. Quorum-based storage is the only supported HDFS HA
2. HA with NFS shared storage
3. Both 1 and 2
4. Both 1 and 2 are supported


Question : Which of the following are the new features of MapReduceV (YARN) architecture

1. ResourceManager High Availability: YARN now allows you to use multiple ResourceManagers so that there is no single point of failure. In-flight jobs are recovered without re-running completed tasks.
2. Monitoring and enforcing memory and CPU-based resource utilization using cgroups.
3. Continuous Scheduling: This feature decouples scheduling from the node heartbeats for improved performance in large clusters
4. 1 and 2
5. 1,2 and 3