L&T Technology Services Electrical Project Engineer Interview Questions and Answers

Q1. This is an online test consists of questions from OS, DBMS, Networking. Couple of coding question was also there. Language specific section also there.
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Q1. Here also I was asked to write the code two coding question difficulty varies from easy to medium. More than that I was asked questions from OS, DBMS, SDLC and basic level question from C and JAVA.
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Q1. This one is kind of advanced technical round. I was asked about C and Java in more depth. Asked to write couple of SQL queries. There are some more conceptual question in SQL.
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Q1. Why should we hire you?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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Q4. Some basic questions and then I was informed that I am selected. There was around 54000 students applied for that role and among them 150 was selected. I got offer letter in the said day and employment sta...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This round focused more on the Operating Systems part followed by some questions from Microservices Architecture.

Q1. What is a bootstrap program in an operating system?
Ans. 
Bootstrap program is the initial code that runs when a computer is powered on, loading the operating system into memory.
• Bootstrap program is stored in ROM or firmware.

• It initializes the system hardware and loads the operating system kernel into memory.

• Examples include BIOS in PCs and UEFI in modern systems.
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Q2. What is memory protection in operating systems?
Ans. 
Memory protection in operating systems is a feature that prevents a process from accessing memory that has not been allocated to it.
• Memory protection helps prevent one process from interfering with the memory of another process.

• It ensures that each process can only access memory that has been allocated to it.

• Examples of memory protection mechanisms include segmentation and paging.

• Segmentation divides memory into segmen...read more
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Q3. What are the four necessary and sufficient conditions that lead to a deadlock?
Ans. 
Four necessary and sufficient conditions for deadlock
• Mutual exclusion: Resources cannot be shared between processes. Example: Process A holding Resource 1 and waiting for Resource 2, while Process B holding Resource 2 and waiting for Resource 1.

• Hold and wait: Processes hold resources while waiting for others. Example: Process A holding Resource 1 and waiting for Resource 2, while Process B holding Resource 2 and waitin...read more
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Q4. What are the fundamental characteristics of a Microservices design?
Ans. 
Microservices design is characterized by modularity, independence, scalability, and resilience.
• Modularity: Microservices are designed as independent modules that can be developed, deployed, and scaled separately.

• Independence: Each microservice operates independently and communicates with other services through APIs.

• Scalability: Microservices allow for scaling specific components of an application based on demand.

• Resili...read more
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Q5. What are the different strategies for deploying microservices?
Ans. 
Different strategies for deploying microservices include blue-green deployment, canary deployment, rolling deployment, and feature flagging.
• Blue-green deployment involves running two identical production environments, with one serving as the active environment while the other is on standby. Traffic is switched from one environment to the other once the new version is deemed stable.

• Canary deployment gradually rolls out ...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This round was preety much mixed and contained questions from DBMS, Java and more importantly Spring Boot.

Q1. Why is normalization needed in a database?
Ans. 
Normalization is needed in a database to reduce data redundancy, improve data integrity, and optimize database performance.
• Eliminates data redundancy by breaking down data into smaller tables

• Reduces update anomalies and inconsistencies in data

• Improves data integrity by enforcing relationships between tables

• Optimizes database performance by reducing storage space and improving query efficiency
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Q2. What are views in SQL?
Ans. 
Views in SQL are virtual tables that are generated based on the result set of a SELECT query.
• Views are not stored physically in the database, but are dynamically generated when queried.

• They can be used to simplify complex queries by encapsulating logic and joining multiple tables.

• Views can also be used to restrict access to certain columns or rows of a table.

• Example: CREATE VIEW vw_employee AS SELECT emp_id, emp_name F
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Q3. What is dependency injection?
Ans. 
Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q4. What is the use of profiles in Spring Boot?
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Profiles in Spring Boot allow for different configurations to be applied based on the environment or specific needs.
• Profiles can be used to define different sets of configurations for different environments such as development, testing, and production.

• By using profiles, you can easily switch between configurations without changing the code.

• Profiles are typically defined in application.properties or application.yml file...read more
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Q5. What are the various access specifiers in Java?
Ans. 
Access specifiers in Java control the visibility of classes, methods, and variables.
• There are four access specifiers in Java: public, protected, default (no specifier), and private.

• Public: accessible from any other class.

• Protected: accessible within the same package or subclasses.

• Default: accessible only within the same package.

• Private: accessible only within the same class.
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Q6. What is a JIT compiler?
Ans. 
JIT compiler stands for Just-In-Time compiler, which compiles code during runtime instead of ahead of time.
• JIT compiler translates bytecode into machine code on the fly

• Improves performance by optimizing frequently executed code

• Examples include Java HotSpot, .NET CLR's JIT compiler
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Round duration - 30 Minutes
Round difficulty - Easy

This is a cultural fitment testing round .HR was very frank and asked standard questions. Then we discussed about my role.

Q1. Why should we hire you?
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Q2. Why are you looking for a job change?
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Prepare normal for aptitude - maths, quant, analytic

My GD topic was Is internet good for students or not

I didn't attempt this as I was noob back in third year Engg

Q1. Basic questions can you relocate, tell me about ur GD and composition
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Q1. Product owner Skills related questions
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Q1. Product owner questions, domain related questions, regulatory related queries,logical reasoning questions,problem solving ability related questions
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Q1. What are your salary expectations?
Ans. 
I am open to discussing salary based on the responsibilities and requirements of the role.
• I am flexible and open to negotiation.

• I am more interested in the overall compensation package rather than just the salary.

• I would like to be compensated fairly for my skills and experience.

• I am confident that we can come to a mutually beneficial agreement.
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Q2. Why should we hire you?
Ans. 
I have a strong background in consulting and a proven track record of delivering successful projects.
• I have extensive experience in the consulting industry, having worked with various clients and industries.

• I have a deep understanding of business processes and can provide valuable insights and recommendations.

• I am highly analytical and detail-oriented, ensuring thorough analysis and accurate problem-solving.

• I am an exc...read more
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Q3. Why are you looking for a change?
Ans. 
I am looking for a change to expand my skills and experience in a new environment.
• Seeking new challenges and opportunities

• Wanting to learn and grow professionally

• Exploring different industries or sectors

• Desire for a better work-life balance

• Relocation or proximity to family

• Company culture or values misalignment
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Q4. Where do you see yourself in 5 years?
Ans. 
In 5 years, I see myself as a highly experienced and sought-after consultant, leading successful projects and making a significant impact in the industry.
• Leading and managing high-profile consulting projects

• Building strong relationships with clients and delivering exceptional results

• Continuously expanding my knowledge and expertise in the field

• Mentoring and developing junior consultants

• Contributing to thought leadershi
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Q5. What are your strengths and weaknesses?
Ans. 
My strengths include strong analytical skills, excellent communication, and problem-solving abilities. My weaknesses include being overly critical of my own work and sometimes taking on too much responsibility.
• Strength: Strong analytical skills

• Strength: Excellent communication

• Strength: Problem-solving abilities

• Weakness: Being overly critical of my own work

• Weakness: Sometimes taking on too much responsibility
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Q6. Tell me about yourself.
Ans. 
I am a highly experienced consultant with a strong background in problem-solving and strategic planning.
• Over 10 years of experience in consulting roles

• Expertise in developing and implementing effective strategies

• Proven track record of delivering successful projects

• Strong analytical and problem-solving skills

• Excellent communication and interpersonal skills

• Ability to work well in cross-functional teams

• Experience in vario...read more
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There was one problem solving question based on binary tree concept.
And rest were aptitude test

Q1. What is a binary tree?
Ans. 
A binary tree is a data structure consisting of nodes, each having at most two children.
• Each node has a left and/or right child node

• The left child node is smaller than the parent node, while the right child node is larger

• Used for efficient searching and sorting algorithms

• Examples include binary search trees and Huffman trees
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Q2. Was given a scenario and was asked to solve that with optimized approach
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Q1. Why do you want to join this company?
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