Hadoop MCQs with answers Page - 4

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📊 Hadoop
Q. MapReduce has undergone a complete overhaul in hadoop is . . . . . . . .
  • (A) 0.21
  • (B) 0.23
  • (C) 0.24
  • (D) 0.26
💬 Discuss
✅ Correct Answer: (B) 0.23
📊 Hadoop
Q. Point out the correct statement.
  • (A) When there is enough space, block replicas are stored according to the storage type list
  • (B) One_SSD is used for storing all replicas in SSD
  • (C) Hot policy is useful only for single replica blocks
  • (D) All of the mentioned
💬 Discuss
✅ Correct Answer: (A) When there is enough space, block replicas are stored according to the storage type list
📊 Hadoop
Q. . . . . . . . . takes node and rack locality into account when deciding which blocks to place in the same split.
  • (A) CombineFileOutputFormat
  • (B) CombineFileInputFormat
  • (C) TextFileInputFormat
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (B) CombineFileInputFormat
📊 Hadoop
Q. Point out the wrong statement.
  • (A) Hadoop works better with a small number of large files than a large number of small files
  • (B) CombineFileInputFormat is designed to work well with small files
  • (C) CombineFileInputFormat does not compromise the speed at which it can process the input in a typical MapReduce job
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (C) CombineFileInputFormat does not compromise the speed at which it can process the input in a typical MapReduce job
📊 Hadoop
Q. The . . . . . . . . requires that paths including and leading up to the directories specified in yarn.nodemanager.local-dirs.
  • (A) TaskController
  • (B) LinuxTaskController
  • (C) LinuxController
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (B) LinuxTaskController
📊 Hadoop
Q. The . . . . . . . . is the ultimate authority that arbitrates resources among all the applications in the system.
  • (A) NodeManager
  • (B) ResourceManager
  • (C) ApplicationMaster
  • (D) All of the mentioned
💬 Discuss
✅ Correct Answer: (B) ResourceManager
📊 Hadoop
Q. . . . . . . . . is the base class for all implementations of InputFormat that use files as their data source.
  • (A) FileTextFormat
  • (B) FileInputFormat
  • (C) FileOutputFormat
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (B) FileInputFormat
📊 Hadoop
Q. Point out the correct statement.
  • (A) YARN also extends the power of Hadoop to incumbent and new technologies found within the data center
  • (B) YARN is the central point of investment for Hortonworks within the Apache community
  • (C) YARN enhances a Hadoop compute cluster in many ways
  • (D) All of the mentioned
💬 Discuss
✅ Correct Answer: (D) All of the mentioned
📊 Hadoop
Q. Point out the correct statement.
  • (A) Configuration parameters may be declared static
  • (B) Unless explicitly turned off, Hadoop by default specifies two resources
  • (C) Configuration class provides access to configuration parameters
  • (D) None of the mentioned
💬 Discuss
✅ Correct Answer: (A) Configuration parameters may be declared static
📊 Hadoop
Q. Point out the wrong statement.
  • (A) addDeprecations adds a set of deprecated keys to the global deprecations
  • (B) configuration parameters cannot be declared final
  • (C) addDeprecations method is lockless
  • (D) none of the mentioned
💬 Discuss
✅ Correct Answer: (B) configuration parameters cannot be declared final

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