Nail Your Next Job Interview with These Top Questions and Answers | aihirely
shape
08 Jan, 2025
SQL Interview Questions Your Ultimate Guide
In SQL, NULL represents the absence of a value or an unknown value. It is different from an empty string or zero; NULL simply means that the value is missing or undefined. Handling NULL values correctly is crucial to ensure data integrity and avoid unexpected behavior in queries. Here are several ways to handle NULL values in SQL:
08 Jan, 2025
SQL Interview Questions and Answers Updated
SQL (Structured Query Language) is a standardized programming language used for managing and manipulating relational databases. It is primarily used to interact with databases by querying, updating, inserting, and deleting data. SQL is essential for tasks related to database management and is widely used in various industries for backend development, data analysis, and more.
08 Jan, 2025
SQL Interview Questions and Answers
To find the Nth highest salary from a table, you can use the following approaches, depending on the SQL dialect you're working with. Below is a common approach using a subquery and the LIMIT/OFFSET clause (for MySQL) or ROW_NUMBER() function (for SQL Server, PostgreSQL, or Oracle).
08 Jan, 2025
Top Node.js Interview Questions(2025)
async/await in Node.js is syntactic sugar built on top of Promises that allows you to write asynchronous code in a more readable, synchronous-like manner. It simplifies the process of working with Promises and makes asynchronous code easier to manage and understand.
08 Jan, 2025
Top Node.js Interview Questions for 2025
Node.js has gained widespread popularity for building web servers due to its unique features and advantages, particularly for handling I/O-heavy applications and concurrent requests. Below are some key advantages of using Node.js for building web servers:
Get Started with the Best AI Interview Assistant
Unlock your full potential with AIhirely! Start today and let the best AI job interview assistant help you practice, refine, and succeed.
Get Started Now