TCS ml engineer Interview Questions, Process, and Tips

Q1. Write a code to sort a list without using inbuild function
Ans. 
Implement a sorting algorithm to sort a list without using built-in functions.
• Use a common sorting algorithm like bubble sort, selection sort, or insertion sort.

• Iterate through the list and compare adjacent elements to swap them if necessary.

• Repeat the process until the list is sorted in ascending order.
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Q2. Explain web scraping using code
Ans. 
Web scraping is the process of extracting data from websites using code.
• Identify the website and the specific data to be extracted

• Use libraries like BeautifulSoup or Scrapy in Python to parse HTML

• Inspect the website's HTML structure to locate the data

• Write code to extract the data and store it in a desired format
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Q1. What is the difference between Precision and Recall?
Ans. 
Precision is the ratio of correctly predicted positive observations to the total predicted positive observations, while Recall is the ratio of correctly predicted positive observations to the all observations in actual class.
• Precision focuses on the accuracy of positive predictions, while Recall focuses on the proportion of actual positives that were correctly identified.

• Precision = TP / (TP + FP)

• Recall = TP / (TP + FN...read more
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Q2. What are the hyperparameters of Random forest?
Ans. 
Hyperparameters of Random Forest include number of trees, max depth of trees, minimum samples per leaf, and maximum features.
• Number of trees: Determines the number of decision trees in the forest.

• Max depth of trees: Controls the maximum depth of each decision tree.

• Minimum samples per leaf: Specifies the minimum number of samples required to be at a leaf node.

• Maximum features: Determines the maximum number of features t
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Q1. Project discussion
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Q2. Bigdata project questions
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Q1. Ml model discussion
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Q2. Have you implemented llama models
Ans. 
LLAMA models are used for large language model adaptation.
• LLAMA models are used for adapting large language models to specific tasks or domains.

• They are commonly used in natural language processing tasks such as text generation, translation, and sentiment analysis.

• Examples of LLAMA models include GPT-3, BERT, and RoBERTa.
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Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.