What are combiners and its purpose?

933

---

On what basis Namenode will decide which datanode to write on?

1266

---

Can Hadoop be compared to NOSQL database like Cassandra?

912

---

What is a Secondary Namenode? Is it a substitute to the Namenode?

1034

---

what are relational operations in pig latin?

867

---

What is the difference between SQL and NoSQL?

1084

---

What are the additional benefits YARN brings in to Hadoop?

967

---

what are the steps involved in decommissioning removing

1026

---

What is the process to change the files at arbitrary locations in HDFS?

1418

---

What is difference between split and block in hadoop?

1399

---

How many JVMs run on a slave node?

1049

---

What is a block and block scanner in HDFS?

1032

---

What is compute and Storage nodes?

1027

---

how would you modify that solution to only count the number of unique words in all the documents?

977

---

How can you overwrite the replication factors in HDFS?

1247

---