Is it important for Hadoop MapReduce jobs to be written in Java?

798

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what job does the conf class do?

752

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What is the key- value pair in Hadoop MapReduce?

644

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What is InputFormat in Hadoop MapReduce?

633

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What are the various InputFormats in Hadoop?

617

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Explain InputSplit in Hadoop MapReduce?

635

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How much space will the split occupy in Mapreduce?

642

---

What is a RecordReader in Hadoop MapReduce?

645

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What is the difference between HDFS block and input split?

854

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How to write MapReduce Programs?

667

---

What is Apache Hive?

775

---

What kind of applications is supported by Apache Hive?

757

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How can you configure remote metastore mode in Hive?

778

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What is indexing and why do we need it?

760

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What is the use of Hcatalog?

895

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