HCL Group Software Engineer Interview Questions, Process, and Tips

Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.

• Data structures are used to manage large amounts of data efficiently

• They can be implemented using arrays, linked lists, trees, graphs, and other methods

• Examples include stacks, queues, hash tables, and binary search trees

State management techniques in asp.net

• ViewState - stores page-specific data in hidden fields

• Session state - stores user-specific data on the server

• Application state - stores application-wide data on the server

• Cookies - stores small amounts of data on the client-side

• Query strings - stores data in the URL

• Cache - stores frequently accessed data on the server for faster access

Difference between viewbag, viewdata, tempdata

• ViewBag is a dynamic object used to pass data from controller to view

• ViewData is a dictionary object used to pass data from controller to view

• TempData is used to store data temporarily between two consecutive requests

• ViewBag and ViewData are used for one-way communication while TempData is used for two-way communication

• TempData is used to store data for redirection scenario

SQL query to find the second highest salary.

• Use the SELECT statement to retrieve the salary column from the employee table.

• Use the ORDER BY clause to sort the salaries in descending order.

• Use the LIMIT clause to limit the result set to the second row.

• Use the OFFSET clause to skip the first row.

• Combine all the clauses to get the second highest salary.