HCLTech Senior Technical Manager Interview Questions and Answers

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Q1. What is DHCP and why do we use it what is dns How does DHCP work in a network What is the role of a router What is a gateway How to boot into safemode
Ans. 
DHCP is a network protocol that automatically assigns IP addresses to devices, DNS translates domain names to IP addresses, routers connect networks, gateways connect networks with different protocols, booting into safe mode allows troubleshooting.
• DHCP automatically assigns IP addresses to devices on a network

• DNS translates domain names to IP addresses for easier access

• Routers connect different networks together to ena...read more
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Q2. What is IP address What are the classes of IP What is workgroup and domain What is BSOD What is 32 bit and 64 bit OS SSD vs HDD explain windows boot process System keeps restarting. Steps to resolve how to...read more
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IP address is a unique identifier assigned to each device connected to a network. Classes of IP include A, B, C, D, and E. Workgroup and domain are network organization structures. BSOD is Blue Screen of Death.
• IP address is a unique numerical label assigned to each device on a network

• Classes of IP include A, B, C, D, and E with different ranges of addresses

• Workgroup is a peer-to-peer network where each computer has its...read more
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Q1. About Project explanation in detailed Dot net core - what is middleware, authorization process, dependency injection, pattern used in your project and explain it, any code scan tool used , how code review...read more
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Q1. Different cache techniques used, authorization , coding test (given a list of string [{"babel" , baxxxx , baeeee},{"sabel,saxxxx"} and we have to get which one is having longest count of same prefix) SQL ...read more
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Q1. General question only and if you will be selected. Salary - Gratuity , insurance and food are deducted from salary 10% Variable pay
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Q1. C#,. Netcore basics
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Code for linked list duplicate removal

Q1. What is vernier caliper
Ans. 
A vernier caliper is a measuring instrument used to accurately measure the dimensions of an object.
• It consists of a main scale and a sliding vernier scale.

• The main scale provides the whole number measurements, while the vernier scale provides the fractional measurements.

• The vernier scale slides along the main scale and is used to determine the precise measurement by aligning the markings on both scales.

• Vernier calipers...read more
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Q2. What is micro meter $ &screw guage
Ans. 
A micrometer is a precision measuring instrument used to measure small distances or thicknesses. A screw gauge is a type of micrometer that uses a screw mechanism for measurement.
• A micrometer is commonly used in engineering and manufacturing industries for precise measurements.

• It consists of a calibrated screw and a scale that allows for accurate readings.

• Micrometers are capable of measuring dimensions as small as a fe...read more
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Q3. What is CNC machine define
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A CNC machine, or Computer Numerical Control machine, is a device that uses computer programming to control the movement and operation of machine tools.
• CNC machines are used in various industries, such as manufacturing, automotive, aerospace, and woodworking.

• They are capable of performing precise and complex operations, such as cutting, drilling, milling, and shaping materials.

• CNC machines eliminate the need for manual...read more
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Q4. What is G-code and M-code
Ans. 
G-code and M-code are programming languages used in CNC machines to control their movements and functions.
• G-code is used to control the movement of the machine, such as speed, direction, and position.

• M-code is used to control the machine's auxiliary functions, such as turning on/off the spindle or coolant.

• Both G-code and M-code are written in a specific format and are executed by the machine's controller.

• Examples of G-...read more
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Q5. What is design and thinking
Ans. 
Design thinking is a problem-solving approach that involves empathy, creativity, and iteration.
• Design thinking involves understanding the user's needs and perspectives

• It emphasizes creativity and brainstorming to generate multiple solutions

• Prototyping and testing are used to refine and improve the solutions

• Design thinking can be applied to a wide range of fields, from product design to business strategy

• Examples of comp...read more
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Q1. What and why IOC Container in spring
Ans. 
IOC Container is a core feature of Spring Framework that manages the dependencies between objects.
• IOC stands for Inversion of Control

• It is used to achieve loose coupling between objects

• It allows objects to be created and wired together by an external framework

• It reduces the amount of code needed for configuration and maintenance

• Examples of IOC Containers in Spring are ApplicationContext and BeanFactory
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Q2. Why we use @Value in spring boot
Ans. 
We use @Value in Spring Boot to inject values from properties files or environment variables.
• Allows for external configuration of application properties

• Values can be injected from properties files or environment variables

• Can be used to inject values into fields, constructors, or methods

• Example: @Value("${my.property}") private String myProperty;
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Q3. Difference between SQL and Non-SQL database
Ans. 
SQL databases are relational and use structured data, while NoSQL databases are non-relational and use unstructured data.
• SQL databases use tables with predefined schema, while NoSQL databases use documents, key-value pairs, or graphs.

• SQL databases are better for complex queries and data analysis, while NoSQL databases are better for scalability and flexibility.

• Examples of SQL databases include MySQL, Oracle, and Postgr...read more
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Q4. Give real time scenario where have you used abstract class and interface
Ans. 
Abstract classes and interfaces are used to achieve abstraction and provide a blueprint for classes to implement.
• Used abstract class to create a base class for different types of vehicles, with common properties and methods.

• Used interface to define a contract for different payment methods, with each method implementing its own logic.

• Abstract classes are used when we want to provide a default implementation for some met...read more
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Q5. How did you handle authentication and authorization in project
Ans. 
Authentication and authorization were handled using a combination of technologies and protocols.
• Used OAuth 2.0 for authentication

• Implemented role-based access control for authorization

• Stored user credentials securely using bcrypt hashing algorithm

• Used JSON Web Tokens (JWT) for session management

• Implemented two-factor authentication for sensitive operations
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Q6. How will you encrypt customer information including SSN and others
Ans. 
Customer information will be encrypted using industry-standard encryption algorithms and stored securely.
• Use industry-standard encryption algorithms such as AES or RSA

• Ensure that encryption keys are securely stored and managed

• Implement secure storage mechanisms such as hashing and salting

• Regularly review and update encryption protocols to ensure they remain secure
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Q7. Why Serialization used
Ans. 
Serialization is used to convert complex data structures into a format that can be easily transmitted or stored.
• Serialization allows data to be sent over a network or saved to a file.

• It enables objects to be stored in a database or memory.

• Serialization is used in web services, messaging systems, and distributed computing.

• Examples include JSON, XML, and binary formats like Protocol Buffers and Apache Avro.
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Q8. Do you have any experience with Jenkins and Cloud Deployement
Ans. 
Yes, I have experience with Jenkins and Cloud Deployment.
• I have used Jenkins for continuous integration and continuous deployment.

• I have experience with setting up Jenkins pipelines for automated deployment.

• I have worked with cloud platforms like AWS and Azure for deploying applications.

• I have used tools like Ansible and Terraform for infrastructure automation.

• I have experience with containerization using Docker and Ku...read more
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Q9. Have you used Logging mechanism
Ans. 
Yes, logging is an essential part of software development.
• Logging helps in debugging and troubleshooting issues.

• It provides a record of events and actions taken by the system.

• It helps in monitoring system performance and identifying bottlenecks.

• Examples of logging mechanisms include log4j, syslog, and ELK stack.
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Q1. Define your rile in the project.
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Q2. Which services you are using in AWS.
Ans. 
We are using multiple services in AWS.
• We are using EC2 for hosting our application servers.

• We are using S3 for storing our static files and backups.

• We are using RDS for our database needs.

• We are using CloudFront for content delivery.

• We are using Lambda for serverless computing.

• We are using Route 53 for DNS management.

• We are using CloudWatch for monitoring and logging.

• We are using IAM for access management.

• We are using ...read more
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Q1. Tell me about your self.
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