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

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
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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
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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
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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
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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
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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
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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
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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
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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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Q1. Basic to depth questions from the skill you mentioned in resume
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Q2. Software testing life cycle?
Ans. 
Software testing life cycle involves planning, designing, executing, and reporting on tests to ensure software quality.
• STLC is a process that starts with test planning and ends with test closure.

• It includes test design, test execution, and test reporting.

• STLC is iterative and involves continuous improvement.

• Examples of STLC models include Waterfall, Agile, and DevOps.
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Q1. What is Bug, error, black box testing?
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Bug is a defect in software, error is a mistake made by a programmer, black box testing is testing without knowledge of internal code.
• Bug: a flaw in software that causes it to behave unexpectedly or incorrectly

• Error: a mistake made by a programmer that results in incorrect code

• Black box testing: testing without knowledge of the internal code, focusing on inputs and outputs

• Example: entering invalid data into a form and ...read more
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