Birlasoft Senior Software Engineer Interview Questions, Process, and Tips

Abstraction is hiding unnecessary details while Encapsulation is hiding implementation details.

• Abstraction focuses on the outside view of an object while Encapsulation focuses on the inside view of an object.

• Abstraction is achieved through abstract classes and interfaces while Encapsulation is achieved through access modifiers like private, public, protected.

• Abstraction is used to reduce complexity and increase efficie...read more

Missileware is a type of software used in missile systems, while a filter is a program that screens data.

• Missileware is designed to control and guide missiles, while filters are used to sort and block data.

• Missileware is typically used in military applications, while filters are used in various industries such as email and internet security.

• Examples of missileware include guidance systems for missiles, while examples o...read more

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces are interfaces with a single abstract method, which can be implemented using lambda expressions.

• Streams provide a way to work with collections of objects in a functional style.

• Default methods allow int...read more

Find 2nd highest number from an array of strings

• Convert array of strings to array of integers

• Sort the array in descending order

• Return the second element in the sorted array

Microservice design pattern is an architectural style where an application is composed of small, independent services that communicate over well-defined APIs.

• Each service is responsible for a specific business function

• Services are loosely coupled and can be developed, deployed, and scaled independently

• Communication between services is typically done through lightweight protocols like HTTP or messaging queues

• Microservic...read more

Annotations used in project: @Component, @Bean. Difference: @Component is a generic stereotype for any Spring-managed component, while @Bean is used to explicitly declare a Spring bean.

• Annotations used in project: @Component, @Bean

• @Component is a generic stereotype for any Spring-managed component

• @Bean is used to explicitly declare a Spring bean

SOLID is a set of five design principles to make software designs more understandable, flexible, and maintainable.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without aff...read more

HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.

• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed a...read more

Angular hooks are lifecycle events in Angular components that allow developers to tap into key moments in a component's lifecycle.

• Angular hooks include ngOnInit, ngOnChanges, ngDoCheck, ngOnDestroy, etc.

• ngOnInit is used for initialization logic, ngOnChanges is used for reacting to input changes, ngDoCheck is used for custom change detection, and ngOnDestroy is used for cleanup tasks.

• Developers can use these hooks to pe...read more

Java Collections framework provides a set of interfaces and classes to store and manipulate groups of objects.

• Collections framework includes interfaces like List, Set, and Map, along with classes like ArrayList, HashSet, and HashMap.

• Internal implementation of collections varies based on the specific collection type.

• For example, ArrayList uses an array to store elements, while LinkedList uses a doubly linked list.

• HashMa...read more