Infosys Senior Technical Lead Interview Questions and Answers

Data skewness refers to the imbalance in the distribution of data values within a dataset.

• Data skewness occurs when certain values or categories appear more frequently than others in a dataset.

• It can lead to performance issues in data processing and analysis.

• To resolve data skewness, techniques like data partitioning, shuffling, and using appropriate algorithms can be employed.

• For example, in a dataset of customer tran...read more

The output of the query will depend on the specific data in the tables being joined.

• The result will be a combination of data from all 4 tables based on the join conditions specified in the query.

• Make sure to check for any filtering conditions in the query that may limit the output.

• The final result will include columns from all 4 tables, with rows that meet the join criteria.