What are the abstractions of Apache Spark?

304

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What is SparkContext in Apache Spark?

307

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What are the components of Apache Spark Ecosystem?

403

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Explain the RDD properties?

309

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What does ‘jps’ command do?

692

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Mention what is the use of Context Object?

719

---

What is commodity hardware?

655

---

Explain what is sqoop in Hadoop ?

721

---

Explain how do ‘map’ and ‘reduce’ works?

734

---

Explain what is the purpose of RecordReader in Hadoop?

743

---

How to restart Namenode?

745

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Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

760

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Mention what are the data components used by Hadoop?

657

---

What does /etc /init.d do?

697

---

What is a Combiner?

740

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