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Blenheim Chalcot Data Scientist Interview Questions and Answers
Blenheim Chalcot Data Scientist Interview Experiences
3 interviews found
Anonymous
Selected
I appeared for an interview before Jun 2024, where I was asked the following questions.
- Q1. How do you narrate a story using data, and what specific factors do you prioritize during this process?
- Ans.
Data storytelling involves transforming data insights into a compelling narrative to drive understanding and action.
Identify the audience: Tailor the narrative to the knowledge level and interests of the audience, e.g., technical vs. non-technical stakeholders.
Define the key message: Focus on the main takeaway you want the audience to remember, such as the impact of a marketing campaign on sales.
Use visuals effectively...
- Q2. How proficient are you in using Python for data science, and can you provide specific examples of your experience?
Selected
I applied via LinkedIn and was interviewed before Oct 2023. There were 3 interview rounds.
Basic aptitude question
(1 Question)
- Q1. Basic analysis and ML questions , more focused on approach instead of coding
(1 Question)
- Q1. As like other HR rounds
I applied via Campus Placement and was interviewed before May 2023. There was 1 interview round.
(2 Questions)
- Q1. Reverse a string in list
- Ans.
Reverse a string in a list of strings
Iterate through each string in the list
Use the built-in function to reverse each string
Store the reversed strings in a new list
- Q2. Explain joins in sql
- Ans.
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
Joins are used to retrieve data from multiple tables based on a related column
Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Skills evaluated in this interview
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Interview Preparation Tips
Experience: The questions were of medium to high difficulty. What set this test apart was the fact that each question had different weightage ranging from 0.5 to 3 marks per question. Time was a major factor. So my strategy was to attempt all the 1 and 1.5 marks questions which constitute the major chunk of the paper in around 40 minutes and spend the remaining 20 minutes for the 2 and 3 mark questions. I did not even bother reading the 0.5 mark questions. The 2 and 3 mark questions were difficult and those will differentiate you from others. 1600 students wrote the test and only 86 got shortlisted for the next round.
Duration: 60 minutes
Total Questions: 40
Round: Technical Interview
Experience: I was asked to write a C program to print the Fibonacci sequence and a basic SQL query. Apart from this I was asked a puzzle and other questions related to my resume. Out of the 86, only 26 students were called for the next round which again was a technical interview.
Round: Technical Interview
Experience: This was similar to the first technical interview. I had to write a C program to print the prime numbers between 1 and 100 and a puzzle was asked again. Apart from this a guesstimate to find the number of cars between 2 places was asked and a scenario based question too was asked. These were followed by resume related questions.
Round: HR Interview
Experience: All the 26 students who attended the second technical round were allowed to attend HR round as well. This was just for 4 - 5 minutes. I was asked about my family background and why I should be hired. My fondest memories from school days were asked too. Finally offer letter was given to 10 students out of the 1600 who wrote the test :P
General Tips: Just keep a calm head and attempt the questions. Ask for time to think if you are not able to answer the questions immediately. Be bold and confident. That is sufficient :)
Skills: Puzzle Solving Capability, Ability To Think, SQL, C Programming
College Name: VIT Vellore
I applied via Campus Placement and was interviewed in Nov 2023. There were 2 interview rounds.
It was a 3 hour test with 144 questions
(1 Question)
- Q1. Why did you select this company?
Selected
I applied via Campus Placement
Normal Aptitude Test
Python or SQL coding round
I applied via Referral and was interviewed in Aug 2022. There were 4 interview rounds.
Most questions were based on profit/loss and coding Questions are simple
Gave us topic on how education is important in our life
(2 Questions)
- Q1. Most Questions are on sql and machine learning as per my resume
- Q2. Find the top two logged in people of each state in facebook
Interview Preparation Tips
- SQL
I applied via Campus Placement and was interviewed in Jul 2023. There were 5 interview rounds.
Multiple sections on cognitive ability, quant and logical reasoning.
1 coding question
Easy
50% went to next round
(3 Questions)
- Q1. Technical: SQL, DBMS, Basic programming questions- palindrome, fibonacci, discussion on projects and internships
- Q2. Difference between UNION and UNION ALL
- Ans.
UNION combines and removes duplicates, UNION ALL combines without removing duplicates.
UNION merges the results of two or more SELECT statements and removes duplicates.
UNION ALL merges the results of two or more SELECT statements without removing duplicates.
UNION is slower as it has to remove duplicates, while UNION ALL is faster.
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column...
- Q3. Types of SQL commands
- Ans.
SQL commands include SELECT, INSERT, UPDATE, DELETE, CREATE, and DROP.
SELECT: retrieves data from a database
INSERT: adds new records to a table
UPDATE: modifies existing records in a table
DELETE: removes records from a table
CREATE: creates a new table, view, or index
DROP: deletes a table or index
(1 Question)
- Q1. Common HR questions
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Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed before Feb 2023. There were 3 interview rounds.
Online platform,
SQL coding
(1 Question)
- Q1. In a one-on-one technical round, all they will ask around your resume
(1 Question)
- Q1. Basic HR question on salary and personal backgroung
Selected
I applied via Campus Placement and was interviewed in Jul 2022. There were 7 interview rounds.
It comprised basic verbal,quants and logical questions of average difficulty.
This is an easy round to get through if you have a strong command of the English language and are able to speak confidently.Very general topics asked.
(4 Questions)
- Q1. Basic Machine Learning questions ( as I mentioned it in my resume)
- Q2. Testing how you would be able to apply those concepts to real world scenarios
- Q3. Generic logical puzzles
- Q4. Basic python programs (3 to 4 questions)
(2 Questions)
- Q1. Asked more about projects mentioned in resume.
- Q2. Tested basic business sense and awareness.
A game round comprising logical puzzles and games.
(3 Questions)
- Q1. Tell me about yourself ( standard intro)
- Ans.
I am a data analyst with a strong background in statistics and programming.
Proficient in statistical analysis and data visualization tools such as Python, R, and Tableau
Experienced in analyzing large datasets and identifying trends and patterns
Skilled in creating reports and presentations to communicate data-driven insights
Strong problem-solving and critical thinking skills
Ability to work collaboratively in cross-funct...
- Q2. Asked more about the roles of teammates in group projects listed in resume.
- Q3. Asked more about myself and whether I could manage the commute to their office
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based on 4 reviews
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