Infosys Interview Questions, Process, and Tips for Experienced

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.

OOPS concepts refer to Object-Oriented Programming concepts which include inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class. Example: Parent class 'Animal' and child class 'Dog'.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class 'Car' with private variables and public methods.

• Polym...read more

Exceptions are unexpected events that disrupt the normal flow of operations.

• Exceptions are errors or unusual conditions that occur during the execution of a program.

• They can be caused by various factors such as invalid input, hardware failures, or network issues.

• Handling exceptions involves using try-catch blocks to catch and handle the errors gracefully.

• Examples of exceptions include NullPointerException, ArrayIndexOu