Teleperformance Interview Questions and Answers

The pop() function in Python removes and returns the last element from a list.

• pop() function modifies the original list

• pop() function takes an optional index parameter to remove and return an element at a specific index

• If the list is empty, pop() function raises an IndexError

Performance tuning of SQL stored procedure involves optimizing query execution time and reducing resource usage.

• Identify and optimize the most resource-intensive queries

• Use appropriate indexing and partitioning techniques

• Minimize network round trips and data transfers

• Avoid using cursors and temporary tables

• Use query hints and plan guides to influence query execution plan

• Regularly monitor and analyze query performance using tools like SQL Profiler and Execution Plan

• Consider us...read more

Asynchronous programming in .NET allows for non-blocking execution of code, improving performance and responsiveness.

• Async and Await keywords used to implement asynchronous programming

• Allows for parallel execution of multiple tasks

• Improves performance and responsiveness of applications

• Examples include web applications, file I/O operations, and database queries

Data warehousing is the process of collecting, storing, and managing data from various sources for analysis and reporting.

• Data warehousing involves extracting data from multiple sources and consolidating it into a single repository.

• It is used for creating reports, analyzing trends, and making informed business decisions.

• Data warehouses are typically designed for query and analysis rather than transaction processing.

• Examples of data warehousing tools include Amazon Redshift, S...read more

CTE and temp tables are used to store intermediate results in SQL queries.

• CTE stands for Common Table Expression and is defined within a query.

• Temp tables are created in the tempdb database and can be accessed across sessions.

• CTEs are generally faster and more readable than temp tables.

• Temp tables are useful for complex queries with multiple steps or when data needs to be manipulated.

• CTEs are useful for recursive queries or when a query needs to reference itself.