L&T Technology Services - interview guide

L&T Technology Services (LTTS) interview questions - a complete guide

LTTS is an engineering services company, so core engineering questions (embedded, mechanical, electronics) come up alongside software. Here is how to prepare for all of them.

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About L&T Technology Services

L&T Technology Services (LTTS) is the L&T group's engineering and R&D services company - in areas such as automotive, plant engineering, medical devices and telecom. Freshers come from both software and core engineering branches.

This guide covers 13 LTTS interview questions with answers - what each question checks and how to answer it - plus the LTTS interview process, round by round, a 7-day preparation plan for freshers, tips and the mistakes to avoid.

L&T Technology Services hiring process

  1. Step 1: Online test

    Logical, quantitative and domain questions, and coding in some drives.

  2. Step 2: Technical interview

    Projects, resume, engineering fundamentals and domain - OOP, DBMS and SQL for software candidates.

  3. Step 3: HR

    Career goals, location preference and compensation.

L&T Technology Services does not publish its fresher hiring process in detail (as of our check). This information is based on candidate reports and varies by role, city and drive - read the official job posting before you apply.

Sources (checked 16 October 2026): LTTS Careers. Hiring processes change - read the official notice before you apply.

L&T Technology Services interview questions and answers

Engineering and domain

  1. 1.What is an embedded system? Give an example.

    What they're checking
    Basics for electronics/embedded roles.
    How to answer
    A computer inside a larger device that does one specific job - like a washing machine's controller or a car's ABS.

  2. 2.What is the difference between a microprocessor and a microcontroller?

    What they're checking
    Electronics basics.
    How to answer
    Microprocessor - only the CPU, with memory and ports outside. Microcontroller - CPU, memory and I/O on one chip, for embedded work.

  3. 3.(Mechanical) What is the difference between stress and strain?

    What they're checking
    Mechanical branch basics.
    How to answer
    Stress - force per unit area. Strain - the ratio of change in shape (unitless). Both are proportional up to the elastic limit.

  4. 4.Where is the CAN protocol used?

    What they're checking
    Awareness of the automotive domain.
    How to answer
    A reliable network protocol for sending data between a vehicle's electronic units (engine, brakes).

  5. 5.What is a pointer to a pointer in C?

    What they're checking
    Embedded C basics.
    How to answer
    A pointer that holds another pointer's address - int **pp. Useful for 2D arrays and for changing a pointer from inside a function.

Software and project

  1. 6.Explain the design of your final year project.

    What they're checking
    Hands-on work - asked the most.
    How to answer
    Like a block diagram: input, processing, output; your part; what problem came up and how you solved it.

  2. 7.Where did you use an OOP concept in your project?

    What they're checking
    Linking theory to practice.
    How to answer
    An example of a class or inheritance from your project - specific.

  3. 8.SQL query: how many employees are in each department?

    What they're checking
    Software roles.
    How to answer
    SELECT department, COUNT(*) FROM employees GROUP BY department.

HR

  1. 9.Which domain - automotive, medical, telecom - do you like, and why?

    What they're checking
    Interest.
    How to answer
    Link it to your studies and project; show flexibility too.

  2. 10.Why LTTS?

    What they're checking
    Motivation.
    How to answer
    Engineering R&D work - whatever genuinely appeals to you.

  3. 11.What is your location preference?

    What they're checking
    Posting.
    How to answer
    Be honest but flexible.

More questions

  1. 12.(Electronics) What does an ADC do?

    What they're checking
    Embedded basics.
    How to answer
    It turns an analog signal (like a temperature sensor's voltage) into a digital number a microcontroller can read.

  2. 13.(Mechanical) What have you designed in CAD software?

    What they're checking
    A practical skill for mechanical roles.
    How to answer
    The software (like SolidWorks/CATIA), the part, and the design decisions you made - tell the truth.

7-day preparation plan for the L&T Technology Services interview

  1. Day 1: Aptitude - quant and logical.
  2. Day 2-3: Your branch's core subjects (embedded/mechanical/electronics/CS).
  3. Day 4: C programming and pointers.
  4. Day 5: Your project's design and diagram.
  5. Day 6: SQL and OOP basics.
  6. Day 7: A mock interview and HR.

Preparation tips

  • Revise your branch's core subjects - it isn't only software here.
  • Practise explaining your final year project with a block diagram.
  • Beware of fraud - any recruiter who asks for fees is fake.

Mistakes to avoid

  • Ignoring the basics of a core engineering branch.
  • Vague answers about your project's design.
  • Paying anyone a 'processing fee' - LTTS has warned about fake recruiters.

Frequently asked questions

What does LTTS do?

The L&T group's engineering and R&D services company - in areas such as automotive, medical devices, plant engineering and telecom.

What is in the LTTS test?

Commonly logical, quantitative and domain questions, and coding in some drives.

Can non-CS students apply to LTTS?

Yes, roles for core engineering branches are commonly reported too.

Does LTTS charge fees?

According to reports, LTTS has warned candidates to beware of fake messages asking for fees.

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