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?

325

---

Explain the level of parallelism in spark streaming?

289

---

Explain join() operation in Apache Spark?

354

---

How to process data using Transformation operation in Spark?

305

---

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

283

---

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?

231

---

Explain the processing speed difference between Hadoop and Apache Spark?

292

---

Explain the operation transformation and action in Apache Spark RDD?

328

---

Explain Spark join() operation?

286

---

How is RDD in Apache Spark different from Distributed Storage Management?

342

---