Slk Software Services Senior Software Engineer Interview Questions, Process, and Tips

SQL is a domain-specific language used for managing and manipulating relational databases.

• SQL stands for Structured Query Language

• MySQL is an open-source relational database management system that uses SQL

• Oracle SQL is a proprietary version of SQL developed by Oracle Corporation

• MySQL is more commonly used for web applications, while Oracle SQL is often used in enterprise environments

Join is a SQL operation used to combine rows from two or more tables based on a related column between them.

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the matched rows from the le...read more

Virtual DOM is a lightweight copy of the actual DOM that allows for efficient updates and rendering in web applications.

• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• It is a representation of the actual DOM in the form of a tree data structure.

• When changes are made to the virtual DOM, a comparison is done with the actual DOM to determine the minimal...read more