Tata Elxsi Senior Engineer Interview Questions, Process, and Tips

Q1. Swap two variables without temp
Ans. 
Use XOR operation to swap two variables without using a temporary variable
• Use XOR operation to swap two variables without using a temporary variable

• Example: a = 5, b = 10. a = a XOR b, b = a XOR b, a = a XOR b. Now a = 10, b = 5
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Q2. Multiply two matrices in CUDA
Ans. 
Matrix multiplication in CUDA involves parallelizing the computation across multiple threads on the GPU.
• Use CUDA kernels to launch parallel threads for matrix multiplication.

• Divide the matrices into blocks and load them into shared memory for faster access.

• Implement the matrix multiplication algorithm in CUDA C/C++.

• Ensure proper memory management and synchronization between threads.
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Q1. Merge two sorted arrays
Ans. 
Merge two sorted arrays into a single sorted array
• Create a new array to store the merged result

• Iterate through both arrays simultaneously and compare elements

• Add the smaller element to the new array and move to the next element in that array

• Continue until all elements from both arrays are merged
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There was normal aptitude questions

Coding questions that i solved in c

Q1. Questions about skills mentioned in resume
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Q2. About any programming language
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Q1. Explain about ourself introduction
Ans. 
I am a highly experienced Senior Engineer with a strong background in software development and project management.
• Over 10 years of experience in software engineering

• Proficient in multiple programming languages such as Java, Python, and C++

• Managed and led successful projects from conception to completion

• Strong problem-solving skills and ability to work well in a team

• Excellent communication and interpersonal skills
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Q2. Where do you see yourself in next 5 years
Ans. 
In the next 5 years, I see myself taking on more leadership roles, further developing my technical skills, and contributing to innovative projects.
• Advancing to a managerial position within the engineering team

• Continuing to enhance my expertise in emerging technologies such as AI and machine learning

• Leading cross-functional teams on high-impact projects

• Mentoring junior engineers to help them grow in their careers
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Q1. Explain Quantization, Convolution
Ans. 
Quantization is the process of mapping input values from a continuous range to a discrete set of values. Convolution is a mathematical operation that combines two functions to produce a third function.
• Quantization reduces the precision of data by mapping it to a smaller set of values. For example, converting a grayscale image from 256 levels to 8 levels.

• Convolution involves sliding one function over another and multipl...read more
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Q2. Swap without using 3rd variable
Ans. 
Swapping two numbers without using a third variable
• Use arithmetic operations to swap values

• Example: a = 5, b = 10; a = a + b; b = a - b; a = a - b;

• Ensure no overflow or underflow occurs
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Q3. Program to multiply two matrices using CUDA
Ans. 
Using CUDA to multiply two matrices efficiently.
• Allocate memory on GPU for matrices A, B, and C

• Copy matrices A and B from host to device

• Launch CUDA kernel to perform matrix multiplication

• Copy result matrix C from device to host

• Free memory on GPU
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Q1. Merge 2 Sorted arrays
Ans. 
Merge two sorted arrays into a single sorted array.
• Create a new array to store the merged result

• Use two pointers to iterate through the two input arrays and compare elements

• Add the smaller element to the new array and move the pointer for that array forward

• Repeat until all elements from both arrays are merged
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Q2. Explain Transformer architecture
Ans. 
Transformer architecture is a deep learning model that uses self-attention mechanism to process sequential data.
• Transformer architecture consists of an encoder and a decoder.

• Self-attention mechanism allows the model to weigh the importance of different input tokens when making predictions.

• Transformer models have been widely used in natural language processing tasks such as machine translation and text generation.
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Q1. What is difference between class based vs functional components in react
Ans. 
Class based components use ES6 classes while functional components are just JavaScript functions.
• Class based components use ES6 classes to define a component

• Functional components are just JavaScript functions that return JSX

• Class based components have access to lifecycle methods like componentDidMount, componentDidUpdate, etc.

• Functional components are simpler and easier to read and test

• With the introduction of hooks in...read more
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Q2. Find distinct chars in string
Ans. 
Count distinct characters in a given string
• Iterate through the string and store each character in a set to ensure uniqueness

• Return the size of the set as the count of distinct characters

• Example: Input 'hello' -> Output 4 (h, e, l, o)
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Q1. First round is basic technical
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Q1. Second round is face to face interview round with senior manager
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Q1. Whats your salary expectations ?
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