Question 21 : _____________ is used to read data from bytes buffers .
1. write()
2. read()
3. readwrite()
4. all of the mentioned
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Question 22 : ______________ is method to copy byte from input stream to any other stream in Hadoop.
1. IOUtils
2. Utils
3. IUtils
4. All of the mentioned
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Question 23 : In order to read any file in HDFS, instance of __________ is required.
1. filesystem
2. datastream
3. outstream
4. inputstream
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Question 24 : HDFS is implemented in _____________ programming language.
1. C++
2. Java
3. Scala
4. None of the mentioned
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Question 25 : HDFS provides a command line interface called __________ used to interact with HDFS.
1. “HDFS Shell”
2. “FS Shell”
3. “DFS Shell”
4. None of the mentioned
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Question 26 : ________ is the slave/worker node and holds the user data in the form of Data Blocks.
1. DataNode
2. NameNode
3. Data block
4. Replication
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Question 27 : The need for data replication can arise in various scenarios like :
1. Replication Factor is changed
2. DataNode goes down
3. Data Blocks get corrupted
4. All of the mentioned
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Question 28 : Which of the following scenario may not be a good fit for HDFS ?
1. HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
2. HDFS is suitable for storing data related to applications requiring low latency data access
3. HDFS is suitable for storing data related to applications requiring low latency data access
4. None of the mentioned
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Question 29 : Point out the wrong statement :
1. Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level
2. Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode
3. User data is stored on the local file system of DataNodes
4. DataNode is aware of the files to which the blocks stored on it belong to
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Question 30 : ________ NameNode is used when the Primary NameNode goes down.
1. Rack
2. Data
3. Secondary
4. None of the mentioned
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