Data Warehouse General Interview Questions
Questions Answers Views Company eMail

What is an error log table in informatica occurs and how to maintain it in mapping?

552

What is static and local variable?

540

What is the main difference between schema in rdbms and schemas in datawarehouse?

535

What is surrogate key? Where we use it explain with example?

478

Explain can a dimension table contains numeric values?

557

What is crass reference table?

583

What is a fact, dimension, measure?

543

Explain difference between e-r modeling and dimentional modeling?

554

Explain the definition of normalized and denormalized view and what are the differences between them?

514

Explain the definition of normalized and denormalized view?

515

Explain why fact table is in normal form?

534

What are situations where snow flake schema is better than star schema to use and when the opposite is true?

526

Explain dimensional modelling?

536

What is batch processing?

569

What is aggregate fact table?

521


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Un-Answered Questions { Data Warehouse General }

List any five applications of data warehouse.

546


Explain about core dimension, balanced dimension, and dirty dimension?

542


What are diagrams?

615


Explain the different types of data warehousing?

559


What are the main steps to build the data warehouse?

645






How to join 3 database like flat file, oracle, db2 in informatrica?

642


What is the difference between mapping parameter & mapping variable in data warehousing?

551


Explain what is a three tier data warehouse?

538


What is vdl (view definition language) explain?

634


Explain dimension table ?

551


Explain how to export mappings to the production environment?

554


What is drill-through?

566


What should I have in mind when building olap solution from scratch?

521


The same tier?

533


what are the other factors of the database on which the loading performance depend?

1489