NULL is a special marker used in SQL to indicate that a data value does not exist in the database.
Setup the data on db-fiddle MySQL V9.0 to practice. Make sure to select latest MySQL version to ensure Common Table Expressions (i.e CTE) is supported.
…
Q1. What are the differences between curl & wget? A1. wget is a tool to download files from servers. It lets you download files from an HTTP/HTTPS or FTP server. You give it a link and it automatically downloads the file where the link points to. … Read more ›...
Q1. What is JSON and how does it differ from an XML? A1. JSON (JavaScript Object Notation) is a lightweight, text-based, language-netral like XML, but less verbose than XML data exchange format. JSON is used in Web services to exchange data between client and server. … Read more ›...
Q1 How will you go about implementing the following validation rules for a user name?
— user name must be between 2 and 17 characters long.
— valid characters are A to Z, a to z, 0 to 9, . (full-stop), _ (underscore) and –
…
YAML interview questions focus on it use cases & syntaxes as YAML is widely used in configuring your application, Docker, Kubernetes, Ansible, etc. This extends YAML with Spring & Java interview Q&As. These YAML interview questions will also help you learn the YAML syntax & use cases. … Read more...
Performance testing is an important process of any software development. You can bring this up yourself to many open-ended questions like — Tell me about yourself? What are some of your recent accomplishments that you are proud of? Setting up a performance/load test script is always the first step in...
Q1. Is Groovy a dynamic programming language? What does “dynamic programming” mean? A1. Yes, Groovy is a dynamic programming language, and the meta programming is the one that gives this dynamic behavior. Dynamic programming means to change code at runtime or compile-time. … Read more ›...
Q1. What is a Transaction? A1. A transaction is a set of operations that should be completed as a unit. If one operation fails then all the other operations fail as well. Example 1: If you transfer funds between two accounts there will be two operations in the set Operation...
Q1. What do you understand by the terms Debit & Credit? A1. Debit is abbreviated as DR & Credit is abbreviated as CR, and form the building blocks of accounting. … Read more ›...
Q. What are some of the considerations in auditing database table data? A. Creating audit tables without any constraints to store record changes. Audit tables are heavily hit with inserts, hence needs to have fewer indices if at all required. … Read more ›...
What is a data pipeline in cloud? A data pipeline is a means of moving data from one place (E.g source systems) to another (E.g. target/destination). The data is transformed and optimized along the way so that it can be analyzed and used to develop business insights. … Read more...
As the demand for containerised applications continues to grow, expertise in AWS ECS has become increasingly valuable for software & data engineers. Q01. What are the benefits of container orchestration services? A02. Container orchestration automates container deployment, management, scaling, and networking. Orchestration tools manage these complexities, … Read more ›...
Below questions are based on the above diagram, and extends AWS Q&As on VPC, Subnets, Availability Zones, VPN, Route tables, NACLs & Security Groups & 15+ AWS Services overview interview Q&As. Q1. What is the purpose WAF in AWS? … Read more ›...
I have a good news, I got job offer. I like to share with you from my bottom of my heart feeling thankful to you.