Discover Dollar Data Scientist Intern Interview Questions, Process, and Tips for Freshers

Multiple Choice Questions related with General Aptitude (Clock, Data Interpretation, Time and Distance, Non-verbal Reasoning), Statistics (probability), Programming (loops, syntax), Fundamentals of Machine Learning, Basics of DBMS and SQL

3 programming questions.
Easy to Medium of LeetCode.
Related with string manipulation, sliding window and one medium question on graph.
Time duration: 2hrs

Q1. Can you introduce yourself?
Ans. 
I am a data science enthusiast with a strong background in statistics and machine learning.
• Completed a Bachelor's degree in Statistics

• Proficient in programming languages like Python and R

• Experience with data visualization tools such as Tableau

• Completed projects involving predictive modeling and data analysis
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Q2. What is convolution operation?
Ans. 
Convolution operation is a mathematical operation that combines two functions to produce a third function.
• Convolution involves sliding one function over another and multiplying the overlapping values at each position.

• It is commonly used in image processing and signal processing to extract features.

• In deep learning, convolutional neural networks use convolution operations to learn spatial hierarchies of features.
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Q3. Explain project which you have mentioned in resume?
Ans. 
Developed a machine learning model to predict customer churn for a telecom company.
• Used Python and scikit-learn library for data preprocessing and model building

• Performed feature engineering to create new variables for better prediction

• Evaluated model performance using metrics like accuracy, precision, recall

• Implemented the model in a production environment for real-time predictions
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Q4. Questions from project such as what is data size? How many classes are there for classification project? Why you have used this specific machine learning algorithm to solve this problem? Why this performan...read more
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Q5. Easy level Leetcode problem to be implemented in an online editor along with explanation
Ans. 
Implement a function to find the maximum product of two integers in an array.
• Iterate through the array and keep track of the two largest and two smallest integers.

• Calculate the products of the largest and smallest integers and return the maximum product.
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Q1. Please, introduce yourself?
Ans. 
I am a data science enthusiast with a strong background in statistics and machine learning.
• Background in statistics and machine learning

• Passionate about data science

• Experience with data analysis tools like Python and R
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Q2. What do you know about our company?
Ans. 
Company is a leading data analytics firm specializing in providing insights for businesses.
• Specializes in data analytics for businesses

• Provides insights to help businesses make informed decisions

• Known for innovative solutions in the field of data science
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Q3. Why you want to join our company?
Ans. 
I am impressed by your innovative projects and collaborative work culture.
• I admire your company's commitment to using data science for social good.

• I am excited about the opportunity to work with cutting-edge technology and talented professionals.

• Your company's reputation for fostering growth and learning aligns with my career goals.
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Q4. Question related with conditional probability?
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Q5. In case deadline is approaching, whether you will compromise with project quality?
Ans. 
No, compromising project quality is not an option even if the deadline is approaching.
• Quality should never be compromised as it reflects the professionalism and credibility of the work.

• Instead of compromising quality, it is better to communicate with the team and stakeholders to find alternative solutions.

• Prioritize tasks, optimize processes, and work efficiently to meet the deadline without sacrificing quality.

• Seek he...read more
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Q6. How you learn new technologies?
Ans. 
I learn new technologies through online courses, tutorials, hands-on projects, and collaborating with peers.
• Enroll in online courses on platforms like Coursera, Udemy, or edX

• Follow tutorials on websites like Medium, YouTube, or official documentation

• Work on hands-on projects to apply new technologies in real-world scenarios

• Collaborate with peers through hackathons, coding meetups, or online forums

• Stay updated with indu...read more
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