What is the difference between Apache Hadoop and RDBMS?

734

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How is security achieved in Apache Hadoop?

830

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What is Apache Hadoop?

797

---

What is a “Distributed Cache” in Apache Hadoop?

720

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What is the problem with small files in Apache Hadoop?

725

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What is Rack Awareness in Apache Hadoop?

743

---

Explain Erasure Coding in Apache Hadoop?

689

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What is Disk Balancer in Apache Hadoop?

796

---

What is a speculative execution in Apache Hadoop MapReduce?

735

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What are the modes in which Apache Hadoop run?

739

---

What is Safemode in Apache Hadoop?

673

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

669

---

Why is Apache Spark faster than Apache Hadoop?

778

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What does ‘jps’ command do?

646

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Mention what is the use of Context Object?

668

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