Data Science Engineer Interview Questions and Answers for Freshers

A binary semaphore is a synchronization primitive that can have only two values: 0 and 1.

• It is used to control access to a shared resource by multiple threads or processes.

• When the semaphore value is 0, it means the resource is currently being used and other threads/processes must wait.

• When the semaphore value is 1, it means the resource is available and can be used by a thread/process.

• Binary semaphores are often used to implement mutual exclusion and prevent race conditions....read more

The static keyword in Java is used to create variables and methods that belong to the class itself, rather than an instance of the class.

• Static variables are shared among all instances of a class.

• Static methods can be called without creating an object of the class.

• Static blocks are used to initialize static variables.

• Static nested classes do not require an instance of the outer class to be instantiated.