10+ Unify Technologies Interview Questions and Answers

Cloud is a network of remote servers that provide on-demand computing resources and services.

• There are three types of cloud: Public, Private, and Hybrid.

• Public cloud is owned and operated by third-party providers, like AWS, Azure, and Google Cloud.

• Private cloud is dedicated to a single organization and is managed internally or by a third-party.

• Hybrid cloud is a combination of public and private cloud.

• Examples of cloud services include Infrastructure as a Service (IaaS), Platf...read more

Higher order component is a function that takes a component and returns a new component with additional functionality.

• HOC is a design pattern in React

• It allows code reuse, logic abstraction and composition

• It can be used for cross-cutting concerns like authentication, logging, etc.

• Example: WithAuth HOC that adds authentication logic to a component

• Example: withRouter HOC that adds routing props to a component

Snapshot is a copy of an EBS volume at a point in time. Elastic IP is a static, public IPv4 address that can be associated with an instance.

• Snapshots are used for backup, disaster recovery, and migrating data between regions.

• Elastic IP allows an instance to maintain the same public IP address even if it is stopped and started again.

• Elastic IP can be associated with a network interface or a NAT gateway.

To terminate an instance, use the EC2 console or CLI. To delete an S3 bucket, use the S3 console or CLI.

• To terminate an instance using the EC2 console, select the instance and click on 'Actions' > 'Instance State' > 'Terminate'.

• To terminate an instance using the CLI, use the 'terminate-instances' command.

• To delete an S3 bucket using the S3 console, select the bucket and click on 'Delete'.

• To delete an S3 bucket using the CLI, use the 'delete-bucket' command.

EC2 is a virtual server in AWS, S3 is a storage service, subnets are network partitions, and internet gateway is a connection to the internet.

• EC2 is a virtual server that can be used to run applications and services

• S3 is a storage service that allows you to store and retrieve data

• Subnets are network partitions that allow you to segment your network

• Internet Gateway is a connection to the internet that allows your instances to communicate with the internet

To reverse a string and find the occurrence of a character in Java.

• Use StringBuilder to reverse the string.

• Use a loop to iterate through the string and count the occurrences of the character.

• Use the charAt() method to access individual characters in the string.

Use Sieve of Eratosthenes algorithm to count prime numbers between 1 to 100.

• Implement Sieve of Eratosthenes algorithm to generate prime numbers up to 100.

• Count the number of prime numbers generated by the algorithm.

• Return the count of prime numbers between 1 to 100.

Find duplicate elements from array

• Iterate through the array and use a hash set to keep track of seen elements

• If an element is already in the set, it is a duplicate

• Return the set of duplicate elements

To take a screenshot in Selenium, use the getScreenshotAs method

• Create a WebDriver instance

• Use the getScreenshotAs method to capture the screenshot

• Save the screenshot to a file using File class

Getter and setter methods are used to access and modify the values of private variables in a class.

• Create a method with the prefix 'get' followed by the variable name to retrieve its value.

• Create a method with the prefix 'set' followed by the variable name to set its value.

• Ensure the getter method returns the value of the variable and the setter method updates the variable with the passed value.

Object-oriented programming paradigm and its four pillars: Inheritance, Encapsulation, Abstraction, Polymorphism

• Inheritance: Allows a class to inherit properties and behavior from another class

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Abstraction: Hiding the complex implementation details and showing only the necessary features

• Polymorphism: Ability to present the same interface for different data types

To add buttons for delete, create a button component with a delete function.

• Create a Button component with a delete function

• Pass a unique identifier for each item to be deleted

• Use onClick event to trigger the delete function

A simple Todo list application using Reactjs

• Create a new React project using create-react-app

• Implement a component for adding new tasks

• Implement a component for displaying the list of tasks

• Add functionality to mark tasks as completed

• Style the Todo list using CSS or a UI library like Material-UI

JavaScript is a programming language commonly used for creating interactive websites.

• JavaScript is a high-level, interpreted programming language.

• It is used to make web pages interactive and dynamic.

• JavaScript can be used for client-side and server-side development.

• Commonly used frameworks/libraries include React, Angular, and Node.js.