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Bright Data Solutions Jr. Data Scientist Interview Questions and Answers
Bright Data Solutions Jr. Data Scientist Interview Experiences
1 interview found
Anonymous
(1 Question)
- Q1. Tell me about your experience with SQL
- Ans.
I have extensive experience with SQL, including writing complex queries, optimizing performance, and working with large datasets.
Proficient in writing complex SQL queries to extract and manipulate data
Experience with optimizing query performance through indexing and query tuning
Familiarity with working with large datasets and joining multiple tables
Knowledge of advanced SQL concepts such as window functions and common
(2 Questions)
- Q1. What is R squared?
- Ans.
R squared is a statistical measure that represents the proportion of the variance for a dependent variable that's explained by an independent variable.
R squared ranges from 0 to 1, with 1 indicating a perfect fit.
It is often used in regression analysis to evaluate the goodness of fit of a model.
An R squared value of 0.7 means that 70% of the variance in the dependent variable can be explained by the independent variabl
- Q2. How linear regression works?
- Ans.
Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables.
Linear regression finds the best-fitting straight line through the data points to predict the value of the dependent variable based on the independent variable(s).
It assumes a linear relationship between the variables and minimizes the sum of the squared differences between the obs...
Skills evaluated in this interview
Interview questions from similar companies
Most like other campus recruiting test
Coding for an example in python
(2 Questions)
- Q1. Query to print date in Sql
- Ans.
Use SELECT statement with DATE_FORMAT function in SQL to print date in desired format.
Use SELECT DATE_FORMAT(date_column, 'desired_format') FROM table_name;
Replace 'date_column' with the column containing the date data and 'desired_format' with the format you want to print the date in.
Example: SELECT DATE_FORMAT(date_column, '%Y-%m-%d') FROM table_name;
- Q2. Question on list and tuple
Interview Preparation Tips
(1 Question)
- Q1. What is precision and recall
- Ans.
Precision and recall are evaluation metrics used in machine learning to measure the performance of a classification model.
Precision is the ratio of correctly predicted positive observations to the total predicted positive observations.
Recall is the ratio of correctly predicted positive observations to the all observations in actual class.
Precision is important when the cost of false positives is high, while recall is i...
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before Feb 2023. There were 2 interview rounds.
(2 Questions)
- Q1. What are the different supervised models used
- Ans.
Supervised models include linear regression, logistic regression, decision trees, random forests, support vector machines, and neural networks.
Linear regression: used for predicting continuous outcomes
Logistic regression: used for binary classification
Decision trees: used for classification and regression tasks
Random forests: ensemble method using multiple decision trees
Support vector machines: used for classification ...
- Q2. Linear regression, logistic regression, decision tree
(1 Question)
- Q1. What are the salary expectations
Skills evaluated in this interview
Do well and contribute well
Do well and contribute well
Do well and contribute well
(2 Questions)
- Q1. Why we choose this job
- Q2. What are your expectations
(2 Questions)
- Q1. Tell me about your self
- Q2. What are your salary expectations
It was an half hour test 20 questions purely based on ML and statistical knowledge.
(1 Question)
- Q1. ML techniques, statistics behind them and questions about your project
Interview Preparation Tips
Selected
I applied via Company Website and was interviewed in Sep 2023. There were 3 interview rounds.
Normal there is not advance requirment
(5 Questions)
- Q1. Will you work will less amount package
- Q2. You wouldn't get any travel cost?
- Q3. What about machine learning
- Ans.
Machine learning is a branch of artificial intelligence that focuses on developing algorithms and models that can learn from and make predictions or decisions based on data.
Machine learning involves training algorithms to learn patterns from data and make predictions or decisions.
It can be supervised, unsupervised, or semi-supervised learning.
Examples include recommendation systems, image recognition, and natural langu
- Q4. Tellm me about any cloud platform
- Ans.
A cloud platform is a service that allows users to store, manage, and process data remotely.
Cloud platforms provide scalable and flexible storage solutions
They offer various services such as computing power, databases, and analytics tools
Examples include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform
- Q5. Telll me about pointer
- Ans.
A pointer is a variable that stores the memory address of another variable.
Pointers are used to access and manipulate memory directly.
They are commonly used in programming languages like C and C++.
Example: int *ptr; // declaring a pointer variable
Interview Preparation Tips
Skills evaluated in this interview
Fibonacci series print
Sales dataset to predict future sales
prakhar makhija
(1 Question)
- Q1. Introduction and overview of the projects
(1 Question)
- Q1. Computer vision questions
I applied via LinkedIn and was interviewed in Nov 2022. There were 2 interview rounds.
(3 Questions)
- Q1. Evaluation metrics used in multiclass classification
- Ans.
Evaluation metrics for multiclass classification
Accuracy
Precision
Recall
F1 Score
Confusion Matrix
- Q2. Difffereence between append and extend
- Ans.
Append adds a single element to a list while extend adds multiple elements.
Append adds the element as it is to the end of the list.
Extend takes an iterable and adds each element of the iterable to the end of the list.
Append can be used to add a single element to a list.
Extend can be used to add multiple elements to a list.
Example: list1 = [1, 2, 3], list2 = [4, 5], list1.append(4) will result in [1, 2, 3, 4], list1.ext
- Q3. Sort a list and take out second minimum
- Ans.
Sort a list and extract the second minimum value.
Sort the list in ascending order using the sort() method.
Extract the second minimum value using indexing.
Handle cases where the list has less than two elements.
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Skills evaluated in this interview
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