Nat IT Solved Interview Questions, Process, and Tips

Q1. Azure cloud platform tech
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Q2. Informatica tech stack ques
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Q1. Adf tech stack que
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Q2. Scd type 2 implementation
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SCD Type 2 implementation involves tracking historical changes in data by creating new records for each change.
• Identify the columns that need to be tracked for changes

• Add effective start and end dates to track the validity of each record

• Insert new records for changes and update end dates for previous records

• Maintain a surrogate key to uniquely identify each version of the record
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Q1. Dw related que ans
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Q2. Solution design related que
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Q1. Aspiration from my end
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Q2. How soon can join
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I can join the team within 2 weeks.
• I can start within 2 weeks of receiving the offer.

• I need to give notice to my current employer.

• I may need to relocate, which could affect my start date.
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Coding is the alphabet letters and write the correct coding in the right way

Aptitude involves the mathematical calculations required to assess amounts over a year.

The assignment revolves around the appropriate skills and experience relevant to the company.

Q1. What is the role of your company?
Ans. 
Our company provides IT solutions and services to businesses of all sizes.
• Developing and maintaining computer systems and networks

• Providing technical support to clients

• Implementing security measures to protect data

• Offering cloud computing solutions

• Managing data storage and backup systems
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Q2. What contributions do you plan to make to this company?
Ans. 
I plan to contribute my strong technical skills, attention to detail, and dedication to ensuring smooth operations.
• Implementing efficient processes to improve workflow

• Troubleshooting and resolving technical issues promptly

• Maintaining accurate records and documentation

• Collaborating with team members to enhance overall productivity
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Q1. What is the nature of technical communication within this company?
Ans. 
Technical communication within the company is clear, concise, and collaborative.
• Technical communication is primarily done through emails, instant messaging, and project management tools.

• Documentation is regularly updated and easily accessible to all team members.

• Meetings and presentations are used to discuss technical issues and updates.

• Collaboration tools like Slack and Microsoft Teams are used for real-time communica
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Q2. What are your communication skills, and how do you plan to apply them in this company?
Ans. 
I have strong communication skills and plan to apply them by effectively conveying information, collaborating with team members, and providing excellent customer service.
• I have experience in effectively communicating with team members to ensure smooth workflow.

• I am skilled in conveying complex technical information in a clear and concise manner.

• I plan to actively listen to colleagues and clients to understand their nee...read more
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A business plan assignment and an introduction to business assignment.

In the company, when there is a project, one team member is required to lead a group discussion about that project to enhance communication skills.

If you have a case regarding the company, how would you approach it?

Q1. What is the aim of your company?
Ans. 
Our company aims to provide efficient and reliable computer operations support to maximize productivity and minimize downtime.
• Maximizing productivity through efficient computer operations

• Minimizing downtime by providing reliable support

• Ensuring smooth functioning of computer systems

• Improving overall efficiency and performance
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Q2. What benefits does the company provide?
Ans. 
The company provides a comprehensive benefits package including health insurance, retirement plans, paid time off, and professional development opportunities.
• Health insurance coverage for employees and their families

• Retirement plans such as 401(k) with employer matching

• Paid time off including vacation days, sick leave, and holidays

• Professional development opportunities like training programs and tuition reimbursement
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Q1. What interests you about this company, and what contributions do you believe you can make to it?
Ans. 
I am interested in the company's innovative technology and believe my experience in troubleshooting and system maintenance can contribute to its success.
• I am impressed by the company's reputation for cutting-edge technology and commitment to excellence.

• I have a strong background in troubleshooting hardware and software issues, which can help maintain smooth operations.

• I am skilled in system maintenance and can ensure o...read more
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Q2. What skills are you bringing to this company?
Ans. 
I bring strong technical skills, attention to detail, and the ability to troubleshoot and resolve issues efficiently.
• Proficiency in operating computer systems and software

• Attention to detail in monitoring and maintaining systems

• Ability to troubleshoot and resolve technical issues efficiently

• Experience in data backup and recovery processes
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Q1. Internal working of HashMap
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Q2. Features of java8
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Q3. Use of synchronized keyword
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Q4. Difference between failsafe and fail fast and also its implementation
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Q5. Coding question : sort an array, use of streams to find names from employee object whose salary is greater than 50000
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Q6. Difference between concurrent and generic collection
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Q7. What is string pool. What is string literal?
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Q8. Security measures used in your project
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Q9. What is difference between rest and soap
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Q10. What do u mean by REST state
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Q11. What is serialization? What is the way to stop serialization?
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Q1. Difference between failsafe and faifast
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Q2. Difference between concurrent and generic collection
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Q3. Security measures used in current project
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Q4. Why you are leaving your current organization and follow up questions on that
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Online MCQ test of dbms c java oops and aptitude

Q1. Introduce yourself
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Q1. Introduce yourself
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Q2. Tell me about your project which you have done in final year
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Q3. What is inheritance explain its type
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Q4. SQL query related questions
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It's walkin, so they conducted 1 technical mcqs round.

Q1. Multi threading
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Q2. Internal working of hashmap
Ans. 
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
• HashMap uses an array of buckets to store key-value pairs.

• Keys are hashed to determine the index in the array where the key-value pair will be stored.

• In case of hash collisions, a linked list or a balanced tree is used to store multiple key-value pairs in the same bucket.

• HashMap allows null keys...read more
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Q3. Spring batch related
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Q4. Non repeating characters in a array
Ans. 
Function to find and return all non-repeating characters in an array of strings.
• Iterate through the array and count the occurrences of each character using a HashMap.

• Then iterate through the array again and check if the count of each character is 1, if so add it to the result list.

• Return the list of non-repeating characters.
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Q5. 3rd highest salary
Ans. 
To find the 3rd highest salary in a database, we can use a SQL query with the 'LIMIT' and 'OFFSET' keywords.
• Use a SQL query with 'ORDER BY salary DESC' to sort the salaries in descending order.

• Use 'LIMIT 1 OFFSET 2' to skip the first two highest salaries and retrieve the third highest salary.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2;
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Q6. Qualifier vs primary
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A qualifier in Java is used to specify additional information about a primary, which is the main data type or variable.
• A primary in Java is the main data type or variable, while a qualifier provides additional information about the primary.

• Qualifiers can be used to modify the behavior or characteristics of a primary.

• For example, in Java, 'final' is a qualifier that can be used to make a variable constant.
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Q7. Controller vs restcontroller
Ans. 
The main difference is that @RestController is a specialized version of @Controller that is used for RESTful web services.
• Both @Controller and @RestController are used in Spring MVC to handle HTTP requests, but @RestController is specifically used for RESTful web services.

• @Controller is used to create web pages, while @RestController is used to return data in JSON or XML format.

• @RestController is a convenience annotati...read more
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Q8. Spring boot annotataions
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Q9. Oops concepts with examples
Ans. 
OOP concepts include inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism: Ability for objects to be treated as instances of their paren...read more
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Q10. Spring batch configuration
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Q11. They covered all java, spring and Microservices
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Q1. Microservices architecture
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Q2. How do Microservices communicate
Ans. 
Microservices communicate with each other through various communication protocols like HTTP, messaging queues, and gRPC.
• Microservices can communicate over HTTP using RESTful APIs.

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

• gRPC is a high-performance, open-source RPC framework that can be used for communication between microservices.

• Service discovery mechanism...read more
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Q3. How to access the Microservice end point
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Microservice endpoints can be accessed using HTTP requests with the appropriate URL
• Use HTTP methods like GET, POST, PUT, DELETE to interact with the microservice

• Construct the URL with the base URL of the microservice and the specific endpoint path

• Include any necessary headers or parameters in the request for authentication or data filtering
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Q4. Why we use microservices
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Microservices allow for modular, scalable, and flexible software development by breaking down applications into smaller, independent services.
• Microservices enable easier maintenance and updates as each service can be developed, deployed, and scaled independently.

• They improve fault isolation, as failures in one service do not necessarily affect the entire application.

• Microservices promote agility and faster time-to-mark...read more
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Q1. What are the different types of interfaces?
Ans. 
Different types of interfaces include user interfaces, hardware interfaces, and software interfaces.
• User interfaces: allow users to interact with the system, such as graphical user interfaces (GUI) and command-line interfaces (CLI)

• Hardware interfaces: connect hardware components to the system, such as USB, HDMI, and Ethernet ports

• Software interfaces: define how software components interact with each other, such as appl...read more
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Q2. What is the output of the program when the expression is evaluated as 0 divided by 7?
Ans. 
The output of the program when 0 is divided by 7 is 0.
• Division of 0 by any number results in 0.

• In programming languages, dividing by 0 usually results in an error or undefined behavior.
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Q3. What are coroutines, scope functions, and visibility modifiers?
Ans. 
Coroutines, scope functions, and visibility modifiers are key concepts in Kotlin programming for Android development.
• Coroutines are a way to perform asynchronous programming in a sequential manner. They allow for non-blocking operations.

• Scope functions are functions that allow you to execute a block of code within the context of an object. Examples include 'let', 'apply', 'run', 'also', and 'with'.

• Visibility modifiers ...read more
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Q1. What is the MVVM (Model-View-ViewModel) architectural pattern?
Ans. 
MVVM is an architectural pattern that separates the user interface from the business logic and data handling in Android development.
• Model represents the data and business logic of the application.

• View is responsible for displaying the UI elements and sending user interactions to the ViewModel.

• ViewModel acts as a mediator between the Model and the View, handling the communication and data flow.

• MVVM helps in achieving se...read more
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Q2. What are the reasons for using that, and what are its pros and cons?
Ans. 
Using dependency injection in Android development can improve code maintainability and testability.
• Pros: easier to manage dependencies, promotes code reusability, facilitates unit testing

• Cons: initial setup can be complex, may introduce overhead in smaller projects

• Example: Using Dagger 2 for dependency injection in an Android project
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Q3. Questions related Dependency injection dagger-hilt / koin
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Q1. What are the reasons for using the Border Gateway Protocol (BGP)?
Ans. 
BGP is used for routing and exchanging routing information between different autonomous systems.
• BGP allows for dynamic routing between different autonomous systems

• It provides redundancy and load balancing by choosing the best path for data traffic

• BGP helps in preventing network loops and ensuring efficient data routing

• It is commonly used by Internet Service Providers (ISPs) to exchange routing information

• BGP is essenti...read more
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Q2. What is a switch stack?
Ans. 
A switch stack is a group of network switches that are interconnected and operate as a single unit.
• Switch stack simplifies network management by allowing multiple switches to be managed as one entity.

• It provides high availability and redundancy by allowing one switch to take over if another fails.

• Switch stack can also increase network performance by load balancing traffic across multiple switches.

• Examples of switch sta...read more
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Q3. What are the configurations required in wireless networking?
Ans. 
Configurations required in wireless networking include SSID, security settings, encryption type, and channel selection.
• Set up a unique SSID to identify the network

• Choose appropriate security settings such as WPA2-PSK

• Select encryption type like AES for secure data transmission

• Optimize channel selection to avoid interference
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Q4. What are the different types of VPNs?
Ans. 
Different types of VPNs include remote access VPN, site-to-site VPN, and client-to-site VPN.
• Remote access VPN allows individual users to connect to a private network remotely.

• Site-to-site VPN connects multiple networks together over the internet.

• Client-to-site VPN allows individual devices to connect to a private network remotely.

• Other types include MPLS VPN, SSL VPN, and IPsec VPN.
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Q5. What is the purpose of native VLAN?
Ans. 
The purpose of native VLAN is to carry untagged traffic across a trunk link.
• Native VLAN is used for untagged traffic on a trunk link

• It allows devices that do not support VLAN tagging to communicate over the trunk link

• Native VLAN should be the same on both ends of the trunk link to avoid VLAN hopping attacks
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10 min, simple question on programming skills

Q1. Which Microservice communication pattern you have used?
Ans. 
I have used the asynchronous messaging pattern for Microservice communication.
• Implemented messaging queues like RabbitMQ or Kafka for decoupled communication

• Used message brokers to enable communication between Microservices

• Leveraged event-driven architecture for real-time updates and scalability
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Q2. Which Application Insight tool you have used?
Ans. 
I have used Application Insights for monitoring and analyzing the performance of .NET applications.
• Used Application Insights to track application performance metrics

• Analyzed telemetry data to identify performance bottlenecks

• Set up alerts and notifications for critical issues

• Integrated Application Insights with Azure DevOps for continuous monitoring
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Q3. Caching Technique is used in your project
Ans. 
We use in-memory caching technique in our project to improve performance and reduce database load.
• In-memory caching is used to store frequently accessed data in memory for quick retrieval

• Helps reduce database load and improve application performance

• Examples: using MemoryCache in .NET, Redis caching, caching frequently accessed data like user profiles or product information
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Q4. Api Gateways is used in MicrosServices
Ans. 
Yes, API Gateways are used in Microservices to manage and secure communication between services.
• API Gateways act as a single entry point for clients to access multiple microservices

• They handle authentication, authorization, rate limiting, logging, and monitoring

• Examples of API Gateways include Kong, Apigee, and AWS API Gateway
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Q5. Which single sign on technology/Mechanism is used in project
Ans. 
We are using OAuth 2.0 for single sign on in the project.
• OAuth 2.0 is a widely used authorization framework that enables a third-party application to obtain limited access to an HTTP service.

• It allows users to log in once and access multiple applications without having to log in again.

• OAuth 2.0 provides secure delegated access to resources without sharing user credentials.
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Q6. What is JWT token,why we use it
Ans. 
JWT token is a JSON Web Token used for secure transmission of information between parties.
• JWT token is a compact and self-contained way to transmit information between parties.

• It is digitally signed to verify its authenticity and integrity.

• JWT tokens consist of three parts: header, payload, and signature.

• They are commonly used for authentication and information exchange in web applications.

• Example: JWT tokens are often
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Q7. How to implement exception handling and filters in .net core web api
Ans. 
Exception handling and filters in .NET Core Web API
• Use try-catch blocks to handle exceptions in the code

• Implement global exception handling middleware to catch unhandled exceptions

• Use filters like [Authorize] for authentication and [ValidateAntiForgeryToken] for CSRF protection

• Create custom exception filters by implementing IExceptionFilter interface
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