L&T Technology Services Verification & Validation Engineer Interview Questions and Answers

Q1. Network theory (R, L, C, filter, circuit behavior), analog electronics (Opamp, BJT), Oscilloscope (how to use to measure parameters),
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Q1. Current ctc, expected ctc. Also, about career path journey. why you left your last job or previous job?
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Q1. Three people will take the interview, one by one. They also ask some basic circuit questions and experience. Prepare your resume well. They will pick some keywords from your resume and frame questions abou...read more
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Q1. What is Black box testing
Ans. 
Black box testing is a software testing method where the internal structure or code of the application being tested is not known to the tester.
• Tester focuses on the functionality of the software without knowing its internal workings

• Tests are based on requirements and specifications

• Input data is provided and output is compared against expected results

• Examples include system testing, acceptance testing, and regression te
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Q2. What is tuple in python
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A tuple in Python is an immutable collection of elements, similar to a list but cannot be changed once created.
• Tuples are created using parentheses ()

• Elements in a tuple can be of different data types

• Tuples can be accessed using indexing or slicing

• Tuples are faster than lists because they are immutable
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Q1. What is hil in lab
Ans. 
HIL stands for Hardware-in-the-Loop, a testing technique used in engineering to validate systems by simulating real-world conditions.
• HIL involves connecting physical hardware components to a simulation environment to test their interactions.

• It allows for testing complex systems in a controlled environment before deployment.

• Examples include testing automotive control systems by connecting them to a simulated vehicle env...read more
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Q2. What is active and passive safety
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Active safety refers to features that help prevent accidents, while passive safety refers to features that protect occupants during a crash.
• Active safety includes technologies like anti-lock brakes, traction control, and lane departure warning systems.

• Passive safety includes features like airbags, seat belts, and crumple zones.

• Active safety systems work to prevent accidents from happening, while passive safety systems ...read more
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Q1. Software testing lifecycle
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Q2. Testing methodologies
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Q3. Embedded c and c based questions
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Q1. Process related to work
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Q2. New ideas to streamline the work
Ans. 
Introduce automation tools and establish clear communication channels
• Implement automated testing to reduce manual effort and increase efficiency

• Use collaboration tools like JIRA to track progress and communicate with team members

• Establish clear guidelines and processes to avoid confusion and delays

• Regularly review and update processes to ensure they are still effective

• Encourage team members to share ideas and suggestio
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Q1. Python related questions for basic sorting arrays
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Q2. Questions from opps concept
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Q3. Linux question basic to mid level
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Q4. Os and understanding of computer organisation
Ans. 
Understanding of computer organization is essential for a Validation Engineer to ensure proper functioning of hardware and software systems.
• Knowledge of computer architecture and components such as CPU, memory, and I/O devices

• Understanding of how data is processed and stored within a computer system

• Familiarity with computer organization principles like instruction set architecture and memory hierarchy

• Ability to trouble...read more
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Q1. Behavioral questions
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Q2. Normal question from current knowledge
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Q1. Manual testing ,automation testing
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Java python regression testing,SDLC

Q1. Java manual testing,SQl,C+++
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Q1. Questions from Semiconductor basics
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Q1. What is registers in computer system
Ans. 
Registers are small, fast storage locations within the CPU used to store data temporarily during processing.
• Registers are used to store data that is being processed by the CPU.

• They are the fastest form of memory in a computer system.

• Registers are used to hold instructions, memory addresses, and data.

• Examples of registers include the program counter, accumulator, and general-purpose registers.
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Q2. What is bios in computer system
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BIOS stands for Basic Input/Output System, a firmware used to perform hardware initialization during the booting process of a computer system.
• BIOS is a firmware that is stored on a chip on the computer's motherboard.

• It is responsible for initializing and testing hardware components during the boot process.

• BIOS provides the necessary instructions for the computer to start up and load the operating system.

• It also provide...read more
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Q3. What is the difference between RAM and ROM
Ans. 
RAM is volatile memory that stores data temporarily, while ROM is non-volatile memory that stores data permanently.
• RAM stands for Random Access Memory and is used for temporary storage of data that can be read and written to.

• ROM stands for Read-Only Memory and is used for permanent storage of data that can only be read from.

• RAM loses its data when power is turned off, while ROM retains its data even when power is off.

• E...read more
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Q4. Difference between Microprocessor and Microcontroller
Ans. 
Microprocessor is a standalone CPU while microcontroller includes CPU, memory, and peripherals on a single chip.
• Microprocessor is typically used in general-purpose computing applications, while microcontroller is used in embedded systems.

• Microprocessor requires external components like memory and peripherals, while microcontroller has them integrated on the chip.

• Examples of microprocessors include Intel Core i7, while ...read more
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Q1. What is your expected CTC
Ans. 
My expected CTC is negotiable based on the role, responsibilities, and benefits offered.
• My expected CTC is based on industry standards and my level of experience.

• I am open to discussing the compensation package during the interview process.

• I am looking for a competitive salary that reflects my skills and contributions to the team.
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Q2. Do you have previous experience
Ans. 
Yes, I have previous experience in post silicon validation.
• I have worked as a Post Silicon Validation Engineer for 3 years at XYZ company

• I have experience in developing validation test plans and executing them

• I have worked on debugging and troubleshooting silicon issues

• I have experience in using lab equipment such as oscilloscopes and logic analyzers
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Q3. Tell me about yourself
Ans. 
I am a dedicated and detail-oriented Post Silicon Validation Engineer with a strong background in testing and troubleshooting semiconductor devices.
• Experienced in developing validation plans and test cases

• Proficient in using lab equipment such as oscilloscopes and logic analyzers

• Skilled in debugging and analyzing test results to identify issues

• Familiar with programming languages like Python and C for test automation
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