EPAM Systems Senior Software Development Engineer Interview Questions and Answers for Experienced

Q1. Http1.1 vs 2.0 vs 3.0
Ans. 
HTTP/1.1 is the older version with persistent connections, HTTP/2.0 introduces multiplexing and server push, and HTTP/3.0 uses QUIC protocol for faster performance.
• HTTP/1.1 uses persistent connections for each request/response, leading to potential performance issues.

• HTTP/2.0 introduces multiplexing, allowing multiple requests/responses to be sent over a single connection simultaneously.

• HTTP/2.0 also supports server pu...read more
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Q2. Print all the possible subsets from a given slice of integers
Ans. 
Print all possible subsets from a given slice of integers
• Use recursion to generate all possible subsets

• For each element in the slice, include or exclude it in the subset

• Keep track of the current subset being generated
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Q3. Questions on GRPC implementation
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Q4. About code profiling
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Q5. What is context package in golanguage
Ans. 
Context package in Go language provides a way to pass around deadlines, cancellation signals, and other request-scoped values.
• Context package is used to manage deadlines, cancellation signals, and request-scoped values in Go programs.

• It allows passing data between function calls without having to pass them explicitly as arguments.

• Context package is commonly used in web servers to manage request-specific data and timeou...read more
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Q6. RestApi vs GRPC
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REST API is a standard protocol for web services using HTTP, while gRPC is a high-performance, open-source RPC framework.
• REST API uses HTTP for communication, making it easy to implement and widely supported.

• gRPC is a modern, high-performance RPC framework that uses HTTP/2 for transport and Protocol Buffers for serialization.

• gRPC is more efficient in terms of performance and supports features like bidirectional streami...read more
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Q1. How to copy slice element and reflect the new changes done in original slice to new slice
Ans. 
Use copy() function to create a new slice and reflect changes in original slice to the new slice.
• Use the copy() function to create a new slice with the same length as the original slice.

• Make changes to the original slice.

• The changes made to the original slice will automatically reflect in the new slice as well.
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Q2. How do you handle panic in golang
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Q3. Why golang is best compared to other languages
Ans. 
GoLang is best for its simplicity, efficiency, concurrency support, and strong community backing.
• Efficient performance due to compiled nature and garbage collection

• Concurrency support with goroutines and channels

• Strong standard library with built-in support for networking, encoding, and more

• Simple and clean syntax that promotes readability and maintainability

• Growing community and ecosystem with popular frameworks like
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Q4. Explain Kubertnetes Architecture
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Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.
• Kubernetes follows a master-slave architecture with a master node controlling multiple worker nodes.

• Master node components include API server, scheduler, controller manager, and etcd.

• Worker node components include kubelet, kube-proxy, and container runtime (e.g. Docker).

• Kubernet...read more
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All the aptitude questions including verbal, non-verbal, technical and general aptitude.

Q1. DBMS, OOPS, Java
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Q1. Ticketing system design
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Ticketing system design involves creating a platform for users to submit, track, and resolve issues or requests.
• Design a user-friendly interface for submitting tickets

• Implement a system for assigning tickets to appropriate teams or individuals

• Include features for tracking ticket status and communication with users

• Consider scalability and performance of the system

• Integrate with other tools or systems for seamless workfl
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Q2. Aws ec2 and jenkins
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Q1. Linux , puzzle, simple programs l
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Q1. About me and about my previous work
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Q1. Questions related Data Sctructure and Algorithms
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Q1. Questions related to Project and TechStack
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Q1. Behavioral questions were asked
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Basic aptitude and essay

Q1. Easy, questions around rojects
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Q1. Basic java and one coding question
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Q1. In depth questions on oops and spring boot hibernate and java 8 features
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Q1. Basics of java were asked
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Q1. Advanced design concepts and sql
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Q1. Salary negotiations behaviour round screening
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