HCLTech Principal Engineer Interview Questions and Answers

Learned from 6th std to 10th maths

C++ and Java, foxpro, unix operating system

Current affairs, political uncertainly, environment impact

Q1. What is the architecture of the Java Virtual Machine (JVM)?
Ans. 
The Java Virtual Machine (JVM) is an abstract computing machine that enables a computer to run Java programs.
• JVM is platform-independent and converts Java bytecode into machine code.

• It consists of class loader, runtime data areas, execution engine, and native method interface.

• JVM memory is divided into method area, heap, stack, and PC register.

• Examples of JVM implementations include Oracle HotSpot, OpenJ9, and GraalVM.
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Q2. What is the default connection pooling in Spring Boot, and how can it be customized?
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The default connection pooling in Spring Boot is HikariCP, which can be customized through properties in the application.properties file.
• HikariCP is the default connection pooling library in Spring Boot, known for its high performance and low overhead.

• To customize the connection pooling, you can modify properties like 'spring.datasource.hikari.*' in the application.properties file.

• For example, you can set maximum pool ...read more
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Q3. What are the best practices for optimizing a Spring Boot application?
Ans. 
Best practices for optimizing a Spring Boot application
• Use Spring Boot Actuator to monitor and manage application performance

• Implement caching mechanisms like Spring Cache to reduce database calls

• Optimize database queries and indexes for better performance

• Use asynchronous processing with Spring's @Async annotation for non-blocking operations

• Profile and analyze application performance using tools like VisualVM or JProfi
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Q4. What is a heap dump, and how can it be used to identify memory leaks?
Ans. 
A heap dump is a snapshot of the memory usage of a Java application at a specific point in time.
• Heap dumps can be generated using tools like jmap or VisualVM.

• They provide detailed information about objects in memory, their sizes, and references.

• Analyzing a heap dump can help identify memory leaks by pinpointing objects that are consuming excessive memory.

• Common signs of memory leaks in a heap dump include a large numbe...read more
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Q5. How can you diagonally iterate through and print the elements of a 2D array?program
Ans. 
Diagonally iterate through and print elements of a 2D array of strings.
• Use nested loops to iterate through rows and columns of the 2D array.

• Calculate the diagonal elements by incrementing row and column indices together.

• Print the elements as you iterate through the diagonal of the array.
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Q1. What is your role and responsibility ?
Ans. 
As a Principal Consultant, my role is to provide expert advice and guidance to clients, lead project teams, and ensure successful project delivery.
• Provide expert advice and guidance to clients

• Lead project teams

• Ensure successful project delivery
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Q2. What is your work experience ?
Ans. 
I have over 10 years of experience in consulting, project management, and leadership roles.
• 10+ years of experience in consulting, project management, and leadership

• Led cross-functional teams to successfully deliver projects on time and within budget

• Developed and implemented strategic plans to drive business growth

• Worked with clients to identify their needs and provide tailored solutions

• Managed stakeholder relationships
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Q1. What is your current CTC and expected CTC ?
Ans. 
My current CTC is $120,000 and my expected CTC is $150,000.
• Current CTC: $120,000

• Expected CTC: $150,000
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Q2. Are you flexible in work or not ?
Ans. 
Yes, I am flexible in work and can adapt to changing situations and priorities.
• I am able to adjust my schedule and priorities to meet the needs of the project or client.

• I am open to new ideas and willing to try different approaches to problem-solving.

• I can work effectively in a fast-paced environment and handle multiple tasks simultaneously.

• I have experience working with diverse teams and can collaborate effectively wi
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Q1. How to do Deployment
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Q2. Mvc page life cycle
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Q1. What is the content of BOM
Ans. 
BOM stands for Bill of Materials, which is a comprehensive list of components, parts, and materials needed to manufacture a product.
• BOM includes detailed information about each component such as part number, description, quantity, and unit of measure.

• It helps in tracking and managing inventory, ordering materials, and estimating production costs.

• BOM can be hierarchical, with sub-assemblies listed under main components.

• ...read more
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Q2. How to draft through zuken
Ans. 
Drafting through Zuken involves using their software tools for creating and editing electronic designs.
• Use Zuken's software tools like CR-8000 or CADSTAR for drafting electronic designs

• Create schematics, layout designs, and PCB designs using Zuken's software

• Utilize features like auto-routing, design rule checks, and 3D visualization for efficient drafting

• Collaborate with team members by sharing and reviewing designs wi
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Q1. Related to Ansbile
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Q2. Related to Terraform
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Q1. Related to project requirement
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Q2. Related to expectation
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Q1. Related compensation
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Q2. Relation policy
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Q1. Tell the Odata create deep entity steps.
Ans. 
OData create deep entity steps involve creating related entities in a single request.
• Use $expand query option to include related entities in the request.

• Specify the related entities in the request payload.

• Ensure proper navigation properties are set in the request payload.

• Example: POST /Orders?$expand=Customer,Products

• Example payload: { OrderID: 123, Customer: { CustomerID: 456, Name: 'John Doe' }, Products: [{ ProductI
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Q2. Types of Enhancements and user exists
Ans. 
Types of enhancements and user exits are customizations made to SAP systems to meet specific business requirements.
• Enhancements are modifications made to standard SAP programs to add new functionality or customize existing features.

• User exits are predefined exit points in SAP programs where custom code can be inserted to meet specific business requirements.

• Enhancements can be classified as implicit enhancements, explic...read more
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Q1. Tell me the one of the development challenge you faced in entire career.
Ans. 
One of the development challenges I faced was implementing a complex algorithm for real-time data processing.
• Understanding the algorithm requirements and constraints

• Optimizing the algorithm for efficiency and speed

• Testing the algorithm with large datasets to ensure accuracy

• Collaborating with team members to troubleshoot and debug any issues
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Q2. Adobe forms development steps and Dynamic enable disable fields in Adobe
Ans. 
Adobe forms development involves creating interactive forms using Adobe software. Dynamic enable/disable fields allow for conditional interactions.
• Adobe forms development involves using Adobe software like Adobe Acrobat or Adobe LiveCycle Designer.

• Steps include designing the form layout, adding form fields, setting up form logic, and testing the form.

• Dynamic enable/disable fields can be achieved using JavaScript to con...read more
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Q1. Structure of Implementation Model
Ans. 
The implementation model outlines the structure and process for executing a project or initiative.
• Define project goals and objectives

• Identify key stakeholders and their roles

• Develop a timeline and milestones

• Allocate resources and budget

• Establish communication channels

• Monitor progress and make adjustments as needed
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Q2. Different stages and owners
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Different stages and owners refer to the various phases of a project or initiative and the individuals or groups responsible for each stage.
• Different stages in a project may include planning, execution, monitoring, and evaluation.

• Owners of each stage could be project managers, team leads, stakeholders, or external consultants.

• Clear delineation of stages and owners helps ensure accountability and progress.

• For example, i...read more
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Q1. The most important part of the Implementation and how will you proceed
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Q2. How would you convince the client to share sensitive data used for implementation
Ans. 
By emphasizing the importance of data for successful implementation and ensuring confidentiality measures are in place.
• Highlight the critical role of data in achieving project goals

• Assure the client of strict confidentiality measures in place

• Explain how sharing sensitive data will lead to better outcomes

• Provide examples of successful implementations where data sharing was crucial
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