Java Questions

A poor Hashcode() function will result in frequent collision in HashMap which eventually increase time for adding an object into Hash Map.

When writing Node.js applications, ending up with hundreds or even thousands of dependencies can easily happen.
For example, if you depend on Express, you depend on 27 other modules directly, and of course on those dependencies' as well, so manually checking all of them is not an option!

The only option is to automate the update / security audit of your dependencies. For that there are free and paid options:

1. npm outdated
2. Trace by RisingStack
3. NSP
4. GreenKeeper
5. Snyk

They should be initialized during the time of declaration itself otherwise it is a compilation eror

to access non-public data outside class getter methods be defined but we cannot define a  method inside interface we can declared a method inside interface.

Inside an interface every method will be by default abstract and public

Stored procedure should return error code if some operation fails but if stored procedure itself fail than catching SQLException is only choice.

There are three ways that can be used in order for a Thread to be created:

A class may extend the Thread class.

A class may implement the Runnable interface.

An application can use the Executor framework, in order to create a thread pool.

The Runnable interface is preferred, as it does not require an object to inherit the Thread class. In case your application design requires multiple inheritance, only interfaces can help you. Also, the thread pool is very efficient and can be implemented and used very easily.