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Topic :: Data





Data Interview Questions
Questions Answers Views Company eMail

Explain NameNode and DataNode in HDFS?

 56

How data or file is read in HDFS?

 40

What alternate way does HDFS provides to recover data in case a Namenode, without backup, fails and cannot be recovered?

 35

Why HDFS performs replication, although it results in data redundancy?

 134

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

 38

Replication causes data redundancy then why is is pursued in HDFS?

 51

How does HDFS ensure Data Integrity of data blocks stored in HDFS?

 43

What is the need of key-value pair to process the data in MapReduce?

 679

Why MapReduce uses the key-value pair to process the data?

 642

In MapReduce Data Flow, when Combiner is called?

 663

What is Data Locality in Hadoop?

 678

Define Writable data types in Hadoop MapReduce?

 648

Who are ‘Data Scientists’?

 424

What is structured and unstructured data?

 457

According to IBM, what are the three characteristics of Big Data?

 444



Related Topics


Un-Answered Questions { Data }

Can we install Oracle database in VT100 Server?

2408

Is there anyway to automatically update the Datasource name in Database Checkpoints object when we migrate tests to a new release?

3907

How to connect to a remote database using Applet?

2562

How database connectivity in XML is achieved?

2253

How data can be inserted into long row column of database?

2163

How to know howmuch data is truncated?

2381

What are the parameters available in user exit for enhancing master data?

1979

What are the data target administration tasks?

2326

Where the data is extracted during init of delta and during delta updates?

2022

How do you transform OH data?

1936

How will you do data driven testing using Robot?

2567

Where the datapool values are stored?

2466

What is datapool cursor?

2327

What is standard data type and what is user defined data type?

2367

What information is contained in the Datapool_config section?

2206