Iris Software Recruitment Executive Interview Questions and Answers

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 queri

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

Threading in .NET allows for concurrent execution of code, improving performance and responsiveness.

• Threading allows for multiple threads of execution to run concurrently

• Thread class is used to create and manage threads

• Thread synchronization is important to prevent race conditions and deadlocks

• Async/await is a newer approach to concurrency in .NET

• TPL (Task Parallel Library) provides higher-level abstractions for concur

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 u...read more

The telecom market in India is highly competitive and rapidly growing.

• India has the second-largest telecom market in the world

• The market is dominated by major players like Jio, Airtel, and Vodafone Idea

• The introduction of 4G technology has led to a surge in data consumption and mobile internet usage

• The government's Digital India initiative is driving growth in the sector

• The market is expected to continue growing with t

GSM and CDMA are two different technologies used for mobile communication.

• GSM stands for Global System for Mobile Communications and uses SIM cards for authentication.

• CDMA stands for Code Division Multiple Access and uses spread spectrum technology for communication.

• GSM uses time division multiplexing for sharing the frequency band while CDMA uses code division multiplexing.

• GSM is widely used in Europe and Asia while C...read more

2G is a second-generation wireless technology while 3G is a third-generation wireless technology.

• 2G offers voice and text services while 3G offers voice, text, and data services.

• 3G has faster data transfer rates than 2G.

• 2G uses circuit-switched technology while 3G uses packet-switched technology.

• 3G allows for video calling and mobile internet access while 2G does not.

• 3G networks are more expensive to build and maintain

Basic skills of creating presentation and excel

• For presentations, use a clear and concise structure with visual aids

• For Excel, understand basic formulas and functions, and use formatting to make data easy to read

• Practice using templates and experimenting with different design options

• Learn keyboard shortcuts to save time and increase efficiency

• Use charts and graphs to illustrate data in a visually appealing way

GPS works by using a network of satellites to triangulate the position of a receiver on Earth.

• GPS satellites orbit the Earth and transmit signals to GPS receivers on the ground.

• The receiver uses the signals from multiple satellites to determine its location through a process called trilateration.

• GPS can provide accurate location information, speed, and direction.

• GPS is used in navigation systems, tracking devices, and ...read more

Hashtable is synchronized while hashmap is not.

• Hashtable is thread-safe while hashmap is not.

• Hashtable does not allow null keys or values while hashmap allows one null key and multiple null values.

• Hashtable is slower than hashmap due to synchronization.

• Hashtable is a legacy class while hashmap is a newer implementation.

Hashmap is not thread-safe while Concurrent Hashmap is thread-safe.

• Hashmap is not suitable for multi-threaded environments as it can lead to race conditions and data inconsistencies.

• Concurrent Hashmap allows multiple threads to access and modify the map concurrently without any data inconsistencies.

• Concurrent Hashmap uses a technique called lock striping to achieve thread-safety.

• Concurrent Hashmap is slower than Hashma...read more