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Customer segmentation methods include demographic, behavioral, psychographic, and geographic segmentation.
Demographic segmentation: dividing customers based on age, gender, income, education, etc.
Behavioral segmentation: categorizing customers based on their behavior towards products or services.
Psychographic segmentation: grouping customers based on their lifestyle, values, beliefs, and personality.
Geographic segmenta...
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I applied via Indeed and was interviewed before Apr 2021. There were 5 interview rounds.
There are several types of ML algorithms, including supervised learning, unsupervised learning, and reinforcement learning.
Supervised learning: algorithms learn from labeled data to make predictions or classifications (e.g., linear regression, decision trees)
Unsupervised learning: algorithms find patterns or relationships in unlabeled data (e.g., clustering, dimensionality reduction)
Reinforcement learning: algorithms l...
Time series classification involves using machine learning algorithms to classify time series data based on patterns and trends.
Preprocess the time series data by removing noise and outliers
Extract features from the time series data using techniques such as Fourier transforms or wavelet transforms
Train a machine learning algorithm such as a decision tree or neural network on the extracted features
Evaluate the performan...
PCA stands for Principal Component Analysis. It is a statistical technique used for dimensionality reduction.
PCA is used to reduce the number of variables in a dataset while retaining the maximum amount of information.
It is commonly used in data preprocessing and exploratory data analysis.
PCA is also used in image processing, speech recognition, and finance.
It works by transforming the original variables into a new set...
It is a typical Data Science assignment. We have to answer few questions asked in the assignment like why do you choose the features? or where can you use this model?
The thought process for choosing the model involved considering the problem requirements, available data, and the desired outcome.
Identified the problem requirements and objectives
Explored the available data and its quality
Considered the nature of the problem (classification, regression, etc.)
Evaluated different models suitable for the problem
Analyzed the strengths and weaknesses of each model
Selected the model that be...
EDA involved exploratory analysis of data to identify patterns and insights. Features included demographic and behavioral data. Metrics used were accuracy, precision, recall, and F1 score.
EDA involved data cleaning, visualization, and statistical analysis
Features included age, gender, income, education, and purchase history
Metrics used were accuracy, precision, recall, and F1 score to evaluate model performance
Explorat...
I expect a competitive salary based on my experience, skills, and the market rate for data scientists.
I have researched the average salary range for data scientists in the industry.
I have considered my level of experience and expertise in the field.
I am open to discussing the salary package based on the overall compensation package offered by the company.
I value fair compensation that aligns with the responsibilities a
I worked as a Data Scientist at XYZ company.
Developed machine learning models to predict customer churn.
Analyzed large datasets to identify patterns and trends.
Collaborated with cross-functional teams to develop data-driven solutions.
Implemented data visualization techniques to communicate insights to stakeholders.
I applied via LinkedIn
Time series case-study
posted on 4 Apr 2023
Around 50 Data science questions in the MCQ format, it was conducted on hacker earth platform, wnough time was available to answer all of them
I applied via Campus Placement and was interviewed in Sep 2021. There were 4 interview rounds.
Sorting algorithm is a method of arranging elements in a specific order.
Common sorting algorithms include bubble sort, insertion sort, selection sort, merge sort, quick sort, and heap sort.
The choice of sorting algorithm depends on the size of the data set, the data type, and the desired time complexity.
Sorting algorithms can be implemented in various programming languages such as Java, Python, and C++.
Reverse a string and find a duplicate in an array of strings.
To reverse a string, we can use the built-in reverse() method or loop through the string and append each character to a new string in reverse order.
To find a duplicate in an array of strings, we can use a hash table to keep track of the frequency of each string and return the first string with a frequency greater than 1.
I was interviewed in Oct 2021.
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with basic DSA questions. Questions on Selenium and Linux commands were also asked.
Given a string STR
containing characters from [a-z], [A-Z], [0-9], and special characters, determine the reverse of the string.
The input starts with a single i...
Reverse a given string containing characters from [a-z], [A-Z], [0-9], and special characters.
Iterate through the characters of the string from end to start and append them to a new string to get the reversed string.
Use built-in functions like reverse() or StringBuilder in languages like Java for efficient reversal.
Handle special characters and numbers along with alphabets while reversing the string.
Ensure to print eac...
Given a string 'S' of length 'N', identify and return all the characters in the string that appear more than once along with their frequency.
N = 5
S =...
Identify and return all characters in a string that appear more than once along with their frequency.
Iterate through the string and count the frequency of each character using a hashmap.
Return characters with frequency greater than 1 in an array of tuples.
The cut command in Linux is used to extract sections from each line of input.
Used to cut out specific sections of text from a file or input stream
Can specify the delimiter used to separate fields
Options include -c for characters, -f for fields, and -d to specify the delimiter
Example: cut -d',' -f1,3 file.txt
The Find command in Linux is used to search for files and directories based on specified criteria.
Used to search for files and directories in a specified directory
Criteria can include file name, size, permissions, and more
Can be combined with other commands like -exec to perform actions on found files
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
I applied via Job Portal and was interviewed before Apr 2023. There was 1 interview round.
based on 1 interview
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