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Annotations in Java provide metadata about a program that can be used by the compiler or at runtime.
Annotations start with the @ symbol.
Annotations can be used to provide information to the compiler or to runtime environments.
Annotations can be used to define custom metadata for classes, methods, fields, etc.
Annotations can also be used for code generation, documentation, and validation.
Examples of annotations in Java ...
ConcurrentSkipListMap is a concurrent, sorted map implementation in Java.
ConcurrentSkipListMap is a concurrent version of SkipListMap, which is a sorted map implementation based on skip list data structure.
It allows multiple threads to access and modify the map concurrently.
It provides logarithmic time complexity for most operations, making it efficient for concurrent access.
Example: ConcurrentSkipListMap
I applied via Naukri.com and was interviewed in Aug 2024. There were 4 interview rounds.
2 Basic Programsl on LRU amd strings
I applied via Naukri.com and was interviewed in Nov 2022. There were 2 interview rounds.
Garbage collection is an automatic memory management process that frees up memory occupied by objects that are no longer in use.
Garbage collection is performed by the JVM.
It helps prevent memory leaks and improves application performance.
There are different types of garbage collectors such as serial, parallel, CMS, and G1.
Garbage collection can cause pauses in the application, which can be minimized by tuning the JVM p...
Microservices design pattern is an architectural approach to building software applications as a collection of small, independent services.
Microservices are independently deployable and scalable
Each microservice focuses on a specific business capability
Communication between microservices is done through APIs
Microservices can be developed using different programming languages and technologies
Examples of companies using
Sessions in Hibernate are used to manage the interaction between the application and the database.
A session is a single-threaded object that represents a connection between the application and the database.
It is responsible for managing the persistence of objects, executing queries, and providing transactional support.
A session can be obtained from a session factory and should be closed when no longer needed.
Example: S...
Hash collusion is when two different inputs produce the same hash value.
It is a security vulnerability in hash functions.
Attackers can exploit this vulnerability to create a collision attack.
For example, an attacker can create a malicious file with the same hash value as a legitimate file to bypass security checks.
Saga design pattern is used to manage long-lived transactions between microservices.
It ensures that all services involved in a transaction are either committed or rolled back together.
It uses a sequence of local transactions to achieve global consistency.
It can be implemented using either choreography or orchestration.
Example: A customer places an order, which involves multiple microservices such as inventory, payment,...
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I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before Oct 2019. There were 3 interview rounds.
I applied via LinkedIn and was interviewed before Dec 2020. There was 1 interview round.
C++ is an extension of C with object-oriented programming features.
C++ supports object-oriented programming while C does not.
C++ has classes and templates while C does not.
C++ has better support for function overloading and default arguments.
C++ has a standard library that includes many useful functions.
C++ allows for both procedural and object-oriented programming.
C++ is generally considered to be a more complex langu
I applied via Naukri.com and was interviewed before Dec 2020. There were 3 interview rounds.
I applied via Company Website and was interviewed before May 2020. There were 4 interview rounds.
I applied via Campus Placement and was interviewed in Apr 2020. There was 1 interview round.
I applied via Company Website and was interviewed before Jun 2021. There were 4 interview rounds.
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