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Valcon Senior Data Engineer Interview Questions and Answers
Valcon Senior Data Engineer Interview Experiences
1 interview found
Anonymous
Selected
I applied via Job Portal
(1 Question)
- Q1. General questions about experience
(1 Question)
- Q1. Technical questions about DWH, ETL
Top trending discussions
Interview questions from similar companies
I applied via LinkedIn and was interviewed in Oct 2024. There were 2 interview rounds.
(2 Questions)
- Q1. DSA question with Some Stack
- Q2. Discussion around Current project
(2 Questions)
- Q1. Managerial discussion around resume and some basic java and spring question
- Q2. Java and spring boot question
I applied via campus placement at Nitte Meenakshi Institute of Technology, Bangalore and was interviewed in Nov 2024. There were 4 interview rounds.
Questions from arrays and strings and some aptitude questions
(2 Questions)
- Q1. How to merge 2 csv files
- Ans.
To merge two CSV files, you can use software like Microsoft Excel or programming languages like Python.
Open both CSV files in a software like Microsoft Excel.
Copy the data from one CSV file and paste it into the other CSV file.
Save the merged CSV file with a new name.
Alternatively, you can use programming languages like Python to merge CSV files by reading both files, combining the data, and writing to a new file.
- Q2. Basic questions on arrays
(1 Question)
- Q1. 3 reasons why u choose this company
- Ans.
I applied to this company because of its reputation in the industry, opportunities for growth, and company culture.
Reputation in the industry - I have heard great things about the company's innovative projects and successful track record.
Opportunities for growth - The company offers various training programs and career advancement opportunities for employees.
Company culture - I value a positive work environment and the...
(1 Question)
- Q1. Questions on python
Skills evaluated in this interview
Selected
I applied via Approached by Company and was interviewed in Aug 2024. There were 5 interview rounds.
I was hiring drive. First round was coding test with medium to advanced SQL, data modelling and python questions
(3 Questions)
- Q1. Data model e commerce application
- Q2. Higest nth rank and lowest rank if no of employees less than 2
- Ans.
If number of employees is less than 2, highest and lowest rank will be the same.
If there are less than 2 employees, both highest and lowest rank will be the same.
For example, if there is only 1 employee, their rank will be 1 which is both the highest and lowest rank.
- Q3. Event session data modeling
(1 Question)
- Q1. Sql-self join, non equi join, window funtion, consecutive seats, data modeling, stock market maximum profit sql question
(1 Question)
- Q1. This was hiring manager round. Detailed discussions on project and previous experience
(1 Question)
- Q1. Strength, weakness and why myntra
Interview Preparation Tips
Gautham Reddy
(2 Questions)
- Q1. Interviewer asked me basic SQL questions
- Q2. In the second technical round he asked me advanced SQL topics (Windows Functions, Joins & Subqueries)
In the second technical round interview asked me about advanced sql topics, theory questions and two coding questions in joins and window functions.
I applied via LinkedIn and was interviewed in May 2024. There was 1 interview round.
(3 Questions)
- Q1. Peevious Experience related questions
- Q2. Dashboard related questions
- Q3. Sql related questions
Interview Preparation Tips
I was informed by the HR team that my interview would be conducted in person, with all rounds taking place on the same day, and that I would receive the results the same day. As a result, I traveled a considerable distance to attend.for the interview the told me to wait for the 3 hrs.
- During the interview, it was disheartening to find that the interviewer seemed uninterested in my responses. I was asked to write queries on paper, and while I was explaining them, the interviewer was preoccupied with reading emails and all other work. Despite providing correct answers, the experience felt dismissive.
After the interview, I was asked to wait for feedback. After waiting for two hours, the HR team informed me that my review was still in process and that they would follow up. After three days and multiple follow-ups, I was eventually told that I did not clear the round.
While I am okay with the outcome, I have a few requests for companies conducting interviews:
1.Respect Candidates' Efforts and Time: Please be considerate of the efforts and time candidates invest, especially those who travel long distances.
2. Clear Communication: If face-to-face interviews are required, particularly for final rounds, please communicate this clearly to avoid unnecessary travel and inconvenience.
I hope these points help improve the interview process for future candidates.
Senior Software Engineer Interview Questions & Answers
Paisabazaar.com
Vivek Singh
posted on 9 Nov 2024
I applied via LinkedIn and was interviewed in May 2024. There were 3 interview rounds.
(4 Questions)
- Q1. What is event loop, how it works.
- Ans.
Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
Event loop is commonly used in JavaScript to handle asynchronous operations like setTimeout, setInterval, and AJAX requests.
It works by continuously checking the event queue for any pending events, executing them one by one, and then moving on to the next event.
Event loop helps in pre...
- Q2. Micro task queue and macro task queue.
- Q3. Is node.js single threaded or multi-threaded, also discuss threadpool and it's usages.
- Q4. Tell the order of output, among process, promise, setTimeout, fs, setInterval.
- Ans.
The order of output is fs, process, setTimeout, setInterval, promise.
fs module is synchronous and will output first
process is next in line
setTimeout will be executed after process
setInterval will be executed after setTimeout
promise will be executed last
(4 Questions)
- Q1. JavaScript usages compiler or interpreter.
- Ans.
JavaScript is an interpreted language.
JavaScript is an interpreted language, meaning it is executed line by line at runtime.
There is no separate compilation step in JavaScript like in languages that use compilers.
Examples of interpreted languages include Python, Ruby, and PHP.
- Q2. Tell the output among various for loops using var, let and bind.
- Ans.
Output comparison of for loops using var, let, and bind in JavaScript.
Using var: variable is function-scoped, may lead to unexpected behavior in loops.
Using let: variable is block-scoped, recommended for loop iterations.
Using bind: creates a new function with a specified 'this' value and initial arguments.
- Q3. A medium level dsa question on array, solved it using pre-sum.
- Q4. Situation based question, on how to pick a suitable database.
(4 Questions)
- Q1. What do you do on daily basis, and how to decide a tech-stack on high level.
- Ans.
I work on coding, debugging, testing, and collaborating with team members. Tech stack decisions are based on project requirements, scalability, performance, and team expertise.
Daily tasks include coding, debugging, testing, and collaborating with team members
Tech stack decisions are based on project requirements, scalability, performance, and team expertise
Consider factors like language compatibility, libraries/framewo...
- Q2. Design an online scalable, real-time document sharing application like google docs.
- Ans.
Design a scalable, real-time document sharing app like Google Docs.
Use websockets for real-time collaboration
Implement version control to track changes
Utilize a distributed database for scalability
Include user authentication and access control
Support offline editing with automatic sync
- Q3. How to handle images also in the future.
- Ans.
Utilize cloud storage for scalability, implement image compression techniques, and regularly update image processing libraries.
Utilize cloud storage for scalability
Implement image compression techniques
Regularly update image processing libraries
- Q4. Any other way to solve the problem, of high I/O on same document to overcome throughput and conflicts.
Skills evaluated in this interview
Questions were crayon box ,the bot and the game and happy neighbourhood for 90 mins
(2 Questions)
- Q1. Array basics was asked
- Q2. Segment tree,prefix sum
(1 Question)
- Q1. Low level design was asked
(2 Questions)
- Q1. PROJECT DETAILS
- Q2. SQL Qns
(2 Questions)
- Q1. PROJECT DETAILS
- Q2. SQL Qnd
(2 Questions)
- Q1. Node JS internal
- Q2. Previous project discussion
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