Porch Interview Questions and Answers

Yes, I can solve a coding problem in a language I don't know with Google search.

• Utilize Google search to understand syntax and concepts in the unfamiliar language

• Break down the problem into smaller parts and search for solutions to each part

• Refer to online resources, forums, and documentation for guidance

• Practice writing and testing code snippets in the new language before attempting the full solution

Software development design patterns are reusable solutions to common problems encountered in software design.

• Design patterns help in creating maintainable, scalable, and efficient software.

• Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

• Example: Implementing a singleton class in Java -

• public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton getInstance() { if(instance...read more

I have worked on relational databases like MySQL and PostgreSQL. DML stands for Data Manipulation Language.

• Worked on MySQL and PostgreSQL databases

• Familiar with writing SQL queries for data manipulation

• DML stands for Data Manipulation Language

Use regex to extract location and shop name from transaction string.

• Use regular expressions to match patterns for location and shop name.

• Look for keywords like 'at', 'from', 'in' to identify location.

• Consider variations in transaction strings and account for them in regex patterns.

• Example: 'Spent $50 at Starbucks Coffee' -> Location: Starbucks Coffee, Shop Name: Starbucks Coffee

Types of deployments include blue-green, canary, rolling, and immutable.

• Blue-green deployment involves running two identical production environments and switching between them.

• Canary deployment gradually rolls out changes to a small subset of users before deploying to the entire infrastructure.

• Rolling deployment updates a few instances at a time, ensuring continuous availability.

• Immutable deployment creates new instances for each update, avoiding in-place updates.

Blue Green Deployment is a software release strategy that reduces downtime and risk by running two identical production environments.

• In Blue Green Deployment, one environment (blue) is live and serving production traffic while the other (green) is idle and ready to be switched to at any time.

• This strategy allows for zero downtime deployments, as the switch between blue and green environments can be done seamlessly.

• Blue Green Deployment also helps in quickly rolling back to th...read more