SemiDot InfoTech Interview Questions and Answers

Q1. What are the different osi layers
Ans. 
The OSI (Open Systems Interconnection) model consists of 7 layers that define the functions of a network communication system.
• Physical Layer: Deals with physical connections and transmission of raw data.

• Data Link Layer: Manages data frames and error detection/correction.

• Network Layer: Handles routing and logical addressing.

• Transport Layer: Ensures end-to-end communication and data flow control.

• Session Layer: Establishe...read more
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Q1. Basic details about yourself
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Q1. What are some ways to avoid deadlock?
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Avoid deadlock by implementing proper resource allocation strategies and using techniques like timeouts and resource ordering.
• Implement proper resource allocation strategies to prevent multiple processes from holding resources indefinitely.

• Use timeouts to limit the amount of time a process can wait for a resource before releasing it.

• Follow a strict resource ordering protocol to ensure processes request and release reso...read more
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Q1. What is angular Directives
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Angular Directives are markers on a DOM element that tell AngularJS's HTML compiler to attach a specified behavior to that DOM element.
• Directives are used to create reusable components or custom behaviors in Angular applications.

• They can be used to manipulate the DOM, add event listeners, show/hide elements, etc.

• Examples include ngModel, ngIf, ngFor, etc.
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Q2. How to communicate with components
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Methods to communicate between components in Angular include Input and Output properties, ViewChild, Services, and Event Emitters.
• Using Input and Output properties to pass data from parent to child components and emit events from child to parent components.

• Using ViewChild to access child components from parent components.

• Using Services to create a shared service that can be injected into multiple components to share da...read more
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Q1. What is difference between responsive and adaptive design ?
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Responsive design adapts to different screen sizes, while adaptive design uses predefined layouts for specific screen sizes.
• Responsive design uses fluid grids and media queries to adjust layout based on screen size.

• Adaptive design uses multiple fixed layout sizes designed for specific screen sizes.

• Responsive design provides a more flexible and seamless user experience across various devices.

• Adaptive design may offer be...read more
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Q2. What is difference between Static and Dynamic website
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Static websites display the same content to all users, while dynamic websites can change content based on user interactions.
• Static websites are built using only HTML and CSS, with no server-side processing involved.

• Dynamic websites use server-side scripting languages like PHP, Python, or Ruby to generate content on the fly.

• Static websites are faster to load as they do not require server processing for each request.

• Dyna...read more
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Q3. What is javascript ?
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JavaScript is a high-level, interpreted programming language used for creating interactive websites and web applications.
• JavaScript is a client-side scripting language that runs in the browser.

• It is used to add interactivity, animations, and dynamic content to websites.

• JavaScript can also be used on the server-side with Node.js.

• Commonly used for form validation, DOM manipulation, and AJAX requests.

• Example: document.get
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Q4. What is react js ?
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React JS is a JavaScript library for building user interfaces.
• React JS allows developers to create reusable UI components.

• It uses a virtual DOM for better performance by updating only the necessary parts of the actual DOM.

• React JS follows a unidirectional data flow, making it easier to manage state and props.

• It is commonly used in single-page applications and for building interactive web interfaces.
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Q5. What is promise in javascript ?
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Promise in JavaScript is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: const myPromise = new Promise((resolve, reject) => { ... });
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Q1. Basic introduction
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Q2. Reason for job change
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Q3. What do you least like about your previous company.
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Q4. Tell me about yourself in brief
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Theoretical knowledge of Excel formulas. And question from resume

Machine test. Moderate questions but tricky like sumif, vlookup, hlookup, count days

Q1. What is .dot net
Ans. 
Dot net is a software framework developed by Microsoft for building and running applications on Windows.
• Developed by Microsoft

• Used for building and running applications on Windows

• Consists of a large class library called Framework Class Library (FCL)

• Supports multiple programming languages like C#, VB.NET, and F#
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Q2. Advantages of using dot net
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Some advantages of using dot net include platform independence, language interoperability, and extensive class library.
• Platform independence allows for cross-platform development.

• Language interoperability enables developers to use multiple programming languages within the same project.

• Extensive class library provides pre-built code for common tasks, saving time and effort.
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Python question was there and it was average level not tough

Simple coding questions which was good to go

Q1. General ops concepts
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Q1. Coding with technical questions
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Q1. General questions
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Q1. What is difference between springboot and spring
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Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.
• Spring is a comprehensive framework that provides support for various functionalities like dependency injection, aspect-oriented programming, and more.

• Spring Boot is an opinionated tool that simplifies the setup and configuration of Spring applications by providing default...read more
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Q2. Explaing springboot annotation
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Spring Boot annotations are used to simplify the development process by providing shortcuts for common configurations and functionalities.
• Annotations like @SpringBootApplication, @RestController, @Autowired, @ComponentScan are commonly used in Spring Boot applications.

• Annotations help in reducing boilerplate code and configuring various aspects of the application.

• For example, @SpringBootApplication is used to mark the ...read more
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Q3. How do you use JPA in your project write it
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I use JPA in my project by defining entity classes, annotating them with JPA annotations, creating repositories, and using JPQL queries.
• Define entity classes with @Entity annotation

• Annotate fields with @Column, @Id, @GeneratedValue, etc.

• Create repositories by extending JpaRepository interface

• Use JPQL queries for custom database operations
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Q1. How microservices communicate in your project
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Microservices communicate through REST APIs and messaging queues in our project.
• Microservices communicate with each other using REST APIs for synchronous communication.

• Messaging queues like Kafka or RabbitMQ are used for asynchronous communication between microservices.

• Service discovery tools like Eureka or Consul are used to locate and communicate with other microservices.

• Microservices may also use gRPC for communicat
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Q2. Which design pattern used in your last project
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Q1. Asked about all projects
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Q2. Team size and agile methodology
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Q1. Why are you leaving current organization
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Q2. What do you know about Emtec
Ans. 
Emtec is a global IT consultancy that provides technology solutions and services to help organizations drive digital transformation.
• Provides IT consultancy services

• Specializes in technology solutions

• Helps organizations with digital transformation
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Q1. Regarding commercial vehicle systems and operations
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Basic Aptitude test and personality test, It's easy

Q1. Code to print diagonal elements in 2d array. Reverse a string without using other empty string.
Ans. 
Print diagonal elements in a 2D array and reverse a string without using an empty string.
• Iterate through the rows and columns of the 2D array and print the elements where the row index is equal to the column index.

• Iterate through the characters of the string from the last index to the first index and append each character to a new string.
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