Oriserve Devops Engineer Interview Questions and Answers

Q1. How to check the open files in the linux without using lsof
Ans. 
To check open files in Linux without using lsof, you can use the /proc filesystem.
• Access the /proc//fd directory to view open files for a specific process.

• Use the find command to search for open files in the /proc directory.

• Check the /proc/sys/fs/file-nr file to see the total number of open files system-wide.
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Q2. What is /proc linux
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The /proc filesystem in Linux is a virtual filesystem that provides detailed information about the system's hardware, processes, and kernel.
• It is a virtual filesystem located at /proc that allows access to kernel data structures.

• It provides information about processes, hardware, and kernel configuration.

• Files in /proc can be read to gather system information, such as CPU usage, memory usage, and network statistics.
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Q1. Difference between http1.1 vs https2
Ans. 
HTTP/1.1 is a protocol for transferring data over the internet, while HTTPS/2 is a secure version of HTTP/2 with improved performance.
• HTTP/1.1 is not secure by default, while HTTPS/2 provides encryption and security.

• HTTP/1.1 uses multiple connections for parallel loading of resources, while HTTPS/2 uses a single connection with multiplexing.

• HTTPS/2 supports header compression, reducing overhead and improving performanc...read more
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Q2. What is grpc ?
Ans. 
gRPC is a high-performance, open-source RPC (Remote Procedure Call) framework developed by Google.
• gRPC stands for Google Remote Procedure Call.

• It uses HTTP/2 for transport, Protocol Buffers for serialization, and supports multiple programming languages.

• gRPC allows for efficient communication between services in a microservices architecture.

• It enables bi-directional streaming and authentication features.

• Example: gRPC ca...read more
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Q1. It was basic techincal interview with basic coding questions
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Q2. Find Fabonacci sum till 555
Ans. 
The Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones, starting from 0 and 1.
• Start with 0 and 1 as the first two numbers in the sequence

• Add the previous two numbers to get the next number in the sequence

• Continue this process until reaching the sum of 555
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Q1. DSA questions like DP and string manipulation questions
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Go,aws, kubernetes, docker, terraform, git

Binary Tree , Stacks & Queues , Recursion

Q1. DSA Questions and Interview question on Networking
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Q1. Basic HR Questions that you will get
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Q1. DSA Round (Prepare Stack DS)
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Q2. Prepare core DevOps tools & Have proper knowledge about a specific cloud + learn k8s
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Reasoning test. with multiple choice question.

Q1. How to make vpc in aws
Ans. 
To create a VPC in AWS, you can use the AWS Management Console, AWS CLI, or AWS SDKs.
• Use the AWS Management Console to navigate to the VPC dashboard and click on 'Create VPC'.

• Specify the VPC name, CIDR block, and other details like DNS support and hardware tenancy.

• You can also use the AWS CLI command 'create-vpc' with the necessary parameters.

• Another option is to use AWS SDKs like Boto3 for Python to programmatically c
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Q2. What was your daily devops day to day task.
Ans. 
My daily tasks as a DevOps Engineer included managing infrastructure, automating processes, monitoring system performance, and collaborating with development teams.
• Managing and maintaining infrastructure using tools like Terraform and Ansible

• Automating deployment processes with CI/CD pipelines using Jenkins or GitLab

• Monitoring system performance and troubleshooting issues with tools like Prometheus and Grafana

• Collabora...read more
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Find element in a linkedList , Reverse a linkedList

Q1. Experience in python, Some python related questions and bash scipting
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