Tekshapers Software Solutions Interview Questions, Process, and Tips

SerialVersionUID is a unique identifier used by Java serialization to ensure version compatibility.

• SerialVersionUID is a static final long variable in a class used to ensure that the serialized object can be deserialized properly even if the class definition changes.

• It is used to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serializat...read more

Use Java Stream to find duplicate element in list of strings

• Convert the list to a stream using list.stream()

• Use Collectors.groupingBy() to group elements by their occurrences

• Filter the map to find elements with count > 1

ConcurrentHashMap is a thread-safe implementation of the HashMap class in Java.

• ConcurrentHashMap allows multiple threads to read and write to the map concurrently without causing a ConcurrentModificationException.

• It achieves thread-safety by dividing the map into segments, each with its own lock, allowing multiple threads to access different segments simultaneously.

• ConcurrentHashMap is part of the java.util.concurrent ...read more

Spring Boot simplifies the development of Java applications by providing a set of tools and conventions.

• Spring Boot reduces the amount of boilerplate code needed for setting up a Spring application

• It provides embedded servers, which means you can run your application as a standalone JAR file

• Spring Boot offers a wide range of starter dependencies to quickly set up common functionalities like database access, security, a

Visa details for working in the USA include H1b and Green Card (GC).

• H1b visa is a non-immigrant visa that allows companies to employ foreign workers in specialty occupations.

• Green Card (GC) is a permanent residency visa allowing individuals to live and work in the USA indefinitely.

• H1b visa holders can apply for Green Card to become permanent residents.

• Employers typically sponsor H1b visas for skilled workers, while Gre...read more