Explain Spark map() transformation?

359

---

What are the types of transformation in RDD in Apache Spark?

322

---

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

287

---

Explain fullOuterJoin() operation in Apache Spark?

420

---

How many partitions are created by default in Apache Spark RDD?

307

---

Explain coalesce operation in Apache Spark?

327

---

Explain the level of parallelism in spark streaming?

293

---

Explain join() operation in Apache Spark?

354

---

How to process data using Transformation operation in Spark?

307

---

What is Resilient Distributed Dataset (RDD) in Apache Spark? How does it make spark operator rich?

285

---

What are the differences between Caching and Persistence method in Apache Spark?

313

---

Explain the operation reduce() in Spark?

288

---

Explain the lookup() operation in Spark?

234

---

Explain the processing speed difference between Hadoop and Apache Spark?

294

---

Explain the operation transformation and action in Apache Spark RDD?

328

---