Explain Hadoop distributed file systemData Lakes Interview Questions for freshers/Data Lakes Interview Questions and Answers for Freshers & Experienced

Explain Hadoop distributed file system

Hadoop works with scalable distributed file systems like S3, HFTP FS, FS, and HDFS. Hadoop Distributed File System is made on the Google File System. This file system is designed in a way that it can easily run on a large cluster of the computer system.

Posted Date:- 2021-10-26 11:22:13

What is a source qualifier?

What is the difference between data cleaning and data transformation?

What do you mean by the slice action and how many slice operated dimensions are used?

What is the difference between a data warehouse and a data mart?

What are conformed dimensions?

How are the time dimensions loaded?

Why do we overwrite the execute method and struts so as parts of the start framework?

Which one is faster: multidimensional OLAP or relational OLAP?

What are the different types of SCDs used in data warehousing?

What is a snapshot with reference to a data warehouse?

Explain the chameleon method utilized in data warehousing.

Explain the ETL cycles three-layer architecture.

What’s the biggest difference between Inmon and Kimball philosophies of knowledge warehousing?

What is the level of granularity of a fact table?

What is the difference between agglomerative and divisive hierarchical clustering?

What is the purpose of cluster analysis and data warehousing?

What is a degenerate dimension?

What is a Dimension Table?

What is the difference between E-R modelling and Dimensional modelling?

What are the types of Dimensional Modelling?

What is dimensional data modelling?

Explain the main responsibilities of a data engineer

What is the core dimension?

What is a conformed fact?

Explain Hadoop distributed file system

What are non-additive facts?

Explain Snowflake Schema

Explain FSCK

How to deploy a big data solution?

Explain Star Schema

What is the abbreviation of COSHH?

What is a conformed fact?

What are non-additive facts?

Explain the main methods of Reducer

What is a fact table?

What is a Factless fact table?

What are the different types of SCD?

What are four V’s of big data?

What is a slowly changing dimension?

List out various XML configuration files in Hadoop?

Name two messages that NameNode gets from DataNode?

What are the steps that occur when Block Scanner detects a corrupted data block?

Define Block and Block Scanner in HDFS

Provide the couples of renowned used ETL tools used in the Industry.

Please provide a couple of data warehouse solutions which are widely used in the industry currently.

What does data purging mean?

What is the difference between view and materialized view?

What is metadata and why is it used for?

What is ODS?

What are the differences between structured and unstructured data?

What is Data Modelling?

What is a data model?

What is the difference between Database vs. Data lake vs. Warehouse vs Data Mart?

What are the key characteristics of a data warehouse?

Why do we need a Data Warehouse?

Why do we need a Data Warehouse?

What is data transformation?

What is the difference between Data Warehousing and Data Mining?

What is Data mining?

What is a Data warehouse?

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