Answer / Trapti Kansal

reduce: It is a transformational action in Spark that reduces an RDD to a single value by applying an associative and commutative binary function. The default function is concatenation for strings, addition for numbers, etc.nfold: It is a more generalized version of reduce. Instead of reducing to a single value, fold can accumulate the result into a user-defined datatype (not just a single value).

Do you need to install spark on all nodes of yarn cluster?

1 Answers  

---

Are spark dataframes immutable?

1 Answers  

---

Is Apache Spark a good fit for Reinforcement learning?

1 Answers  

---

What is the command to start and stop the Spark in an interactive shell?

1 Answers  

---

How do sparks work?

1 Answers  

---

Explain the various Transformation on Apache Spark RDD like distinct(), union(), intersection(), and subtract()?

1 Answers  

---

What is the method to create a data frame?

1 Answers  

---

Who uses apache spark?

1 Answers  

---

Where is apache spark used?

1 Answers  

---

What are the actions in spark?

1 Answers  

---

What apache spark is used for?

1 Answers  

---

Describe Spark SQL?

1 Answers  

---