What is the difference between Apache Hadoop and RDBMS?

814

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How is security achieved in Apache Hadoop?

916

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What is Apache Hadoop?

862

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What is a “Distributed Cache” in Apache Hadoop?

790

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What is the problem with small files in Apache Hadoop?

790

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What is Rack Awareness in Apache Hadoop?

819

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Explain Erasure Coding in Apache Hadoop?

756

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What is Disk Balancer in Apache Hadoop?

904

---

What is a speculative execution in Apache Hadoop MapReduce?

800

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What are the modes in which Apache Hadoop run?

805

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What is Safemode in Apache Hadoop?

746

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What are the different methods to run Spark over Apache Hadoop?

724

---

Why is Apache Spark faster than Apache Hadoop?

847

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What does ‘jps’ command do?

704

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Mention what is the use of Context Object?

726

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