👉 What is the role of the browser other than accessing the website?
Browser acts as a Interpreter for html, CSS and JavaScript.
👉 What is an event in browser?
An event refers to an action or occurrence that happens in the system you are programming. The system then notifies you about the event so that you can respond to it in some way if necessary.
👉 What are the various ways to include JavaScript in our HTML code?
users can add JavaScript to HTML pages.
Embedding code, Inline code, External file.
👉 Write the syntax of print statement in JavaScript?
document.write(variable name)
👉 What is JavaScript framework give…


In 2021, When industries are running towards automation, adopting different DevOps tools to solve their industrial use-cases. In this race, Jenkins is one the most promising tool. These automation tools not only automate the thing but also help in reducing the cost.

In this article, we are going to discuss the following things:

  • What is Jenkins?
  • What is Jenkins used for?
  • How does it work?
  • Advantage of Jenkins.
  • At least one use case of Jenkins.

What is Jenkins?

Jenkins — an open-source automation server that enables developers around the world to reliably build, test, and deploy their software.

Jenkins is written in Java…


OpenShift is a family of containerization software products developed by RedHat. Its flagship product is the OpenShift Container Platform — an on-premises as a services built around Docker Container orchestrated and managed by Kubernetes on a foundation of Red Hat Enterprise Linux. The family’s other products provide this platform through different environments: OKD serves as the community-driven upstream(akin to the way that Fedora is upstream of Red Hat Enterprise Linux), OpenShift Online is the platform offered as Software as a Service, and Openshift Dedicated is the platform offered as a managed service.

Features and benefits

  • Manage with simplicity. In the cloud or anywhere…

👉 Introduction of the file system:- We write/store data in the file, file store in a folder and folder stores on the hard disk. Even if we use SSD hard disk, there is always a i/o performance hit.
👉 What is Data Model? :- The term data model can refer to two distinct but closely related concepts. That are objects and relationships found in a particular application domain for example the customers, products, and orders found in a manufacturing organization.
👉 What are SQL and NoSQL databases? :- SQL is the predefined, fixed schema based, tabular data model. If new attribute come…


According to the internet Azure Kubernetes Service (AKS) is the quickest way to use Kubernetes on Azure. Azure Kubernetes Service (AKS) manages your hosted Kubernetes environment, making it quick and easy to deploy and manage containerized applications without container orchestration expertise. It also eliminates the burden of ongoing operations and maintenance by provisioning, upgrading, and scaling resources on-demand, without taking your applications offline. Azure DevOps helps in creating Docker images for faster deployments and reliability using the continuous build option.

USE CASE: WhiteSource


WHAT S AMAZON SQS:

Amazon Simple Queue Service is a distributed message queuing service introduced by Amazon.com in late 2004. It supports programmatic sending of messages via web service applications as a way to communicate over the Internet. Amazon Simple Queue Service (Amazon SQS) is a pay-per-use web service for storing messages in transit between computers. Developers use SQS to build distributed applications with decoupled components without having to deal with the overhead of creating and maintaining message queues.

Oyster Case Study

New York-based Oyster.com shares unvarnished reviews of hotels in nearly 200 destinations worldwide. The company’s own investigators visit each location to assess cleanliness, amenities, service…


Set up a Hadoop Cluster using Ansible | LaptrinhX

What is Hadoop?

Apache Hadoop is a collection of open-source software utilities that facilitates using a network of many computers to solve problems involving massive amounts of data and computation. It provides a software framework for distributed storage and processing of big data using the MapReduce programming model

Hadoop Cluster Architecture

Basically, for the purpose of storing as well as analyzing huge amounts of unstructured data in a distributed computing environment, a special type of computational cluster is designed that what we call as Hadoop Clusters. …


What is Docker?

Docker is a set of platform as a service products that use OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels

So, What are we going to deploy here?

We are going to write a playbook that’s gonna perform the following tasks:-

🔅 Configure Docker
🔅 Start and enable Docker services
🔅 Pull the httpd server image from the Docker Hub
🔅 Run the httpd container and expose it to the public
🔅 Copy the html code in /var/www/html directory and start the web…

Logical Volume Management:

Consider we are having two harddisk with size 10 GB and 20 GB, suppose we are having an scenario where we need to store a single file of 25 GB, can we store it? Answer yes, the solution is we can combine these harddisk. Then they wil be considered as single device. This concept is known as LVM (Logical Volume Management).

Lets start creating it….

Steps to be followed to create LVM :

  • First make Physical Volume (PV) with the harddisks.
  • Create a group of these physical volumes which is called as Volume Group (VG).
  • Now we have to make…

So today we are setup Python interpreter and run a python code on Docker. For that firstly ensure no containers are running

Rishyani Bhattacharya

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