Tata Elxsi Senior Engineer Interview Questions and Answers for Experienced

Interviewers will look for a solid understanding of coding languages and the ability to solve problems or write simple code. For senior roles, candidates should anticipate an in-depth exploration of the technology or language they work with.

Q1. Tell me about yourself
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Q2. What do you like to do in your free time?
Ans. 
In my free time, I enjoy exploring technology, hiking, and volunteering, which help me grow personally and professionally.
• I love experimenting with new programming languages and frameworks, like building a personal project using React.

• Hiking is a passion of mine; I often explore local trails and enjoy nature, which helps me recharge.

• I volunteer at a local coding bootcamp, mentoring aspiring developers and sharing my kn...read more
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Q1. Explain Quantization, Convolution
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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
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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
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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
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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
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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
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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. MCQ on core skillset
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Q1. Technical round
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Q1. Salary and joining date confirmation
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