L&T Technology Services Testing 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. 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. 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. 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
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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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Q1. What is the difference between usb 2.0 and 3.0
Ans. 
USB 3.0 is faster than USB 2.0 and has improved power management capabilities.
• USB 2.0 has a maximum data transfer rate of 480 Mbps, while USB 3.0 has a maximum data transfer rate of 5 Gbps.

• USB 3.0 is backward compatible with USB 2.0 devices, but USB 2.0 is not forward compatible with USB 3.0 devices.

• USB 3.0 provides better power management, allowing devices to draw more power without exceeding the limit.

• USB 3.0 ports a...read more
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Q2. Explain Software testing life cycle
Ans. 
Software testing life cycle is a process of planning, designing, executing, and reporting on tests throughout the software development lifecycle.
• 1. Requirement Analysis: Understanding the requirements and creating test cases.

• 2. Test Planning: Defining the test strategy, scope, resources, and schedule.

• 3. Test Design: Creating detailed test cases based on requirements.

• 4. Test Execution: Running the test cases and reporti...read more
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Q3. Difference between waterfall and agile methodology
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Waterfall is a linear sequential approach to software development, while Agile is an iterative and incremental approach.
• Waterfall follows a sequential process, with each phase completed before moving on to the next.

• Agile involves breaking the project into small increments and delivering them in short iterations.

• Waterfall is more rigid and requires detailed planning upfront, while Agile is more flexible and adaptable to...read more
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Q1. Regression testing
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Q1. Are u able to work in hardware domains
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