3M Data Engineer Interview Questions and Answers

Q1. What metrics can be used to evaluate the performance of a regression model?
Ans. 
Various metrics like Mean Squared Error, R-squared, Mean Absolute Error can be used to evaluate regression model performance.
• Mean Squared Error (MSE) - measures the average of the squares of the errors or deviations

• R-squared (R2) - indicates the proportion of the variance in the dependent variable that is predictable from the independent variables

• Mean Absolute Error (MAE) - measures the average of the absolute errors b...read more
Answered by AI
Add your answer
Q2. What methods can be used to remove a specific type of noise from an image?
Ans. 
Methods like median filtering, Gaussian filtering, and wavelet denoising can be used to remove noise from an image.
• Median filtering replaces each pixel's value with the median value of its neighborhood.

• Gaussian filtering uses a weighted average of neighboring pixels to smooth out noise.

• Wavelet denoising decomposes the image into different frequency bands and removes noise from each band separately.
Answered by AI
Add your answer

Machine learning-based problem.

Q1. Simple qst about previous expreiences
Add your answer
Q2. Why do wanna join our company
Ans. 
I am impressed by your company's innovative projects and collaborative work culture.
• I admire the cutting-edge technology used in your projects

• I am excited about the opportunity to work with a talented team

• I value the emphasis on collaboration and continuous learning at your company
Answered by AI
Add your answer

Take home, a basic crud application

Q1. Salary expectation .
Add your answer
Q2. Why should I hire you?
Add your answer

Q1. Mendix Advanced questions.
Add your answer
Q2. Everything which you mentioned in your resume.
Add your answer

1 hr test , basics C++, oops, pointers

Q1. Oops concepts , smart pointers, ask me write code of oops concepts and then cross questioning
Add your answer

It was easy.The gd topic was based on the current affairs like chatgpt replaces human activities

Q1. It was all about oops concepts and basic in sql
Add your answer
Q2. It is general HR discussion
Add your answer

Q1. Tell me about yourself.
Add your answer
Q2. Aout Your Degree.
Add your answer
Q3. Some Reading newspaper for communication
Add your answer

10 class pcm 66%and 12 class Pcm 65%

Q1. Your previous company name
Add your answer
Q2. What is skill in excel
Add your answer
Q3. What do system operate and connectivity
Ans. 
System operate and connectivity refer to the functioning and communication capabilities of computer systems.
• System operate involves the overall functioning and performance of a computer system.

• Connectivity refers to the ability of a system to communicate with other devices or networks.

• Examples of connectivity include Wi-Fi, Ethernet, Bluetooth, and USB connections.

• System operate includes tasks such as processing data,
Answered by AI
Add your answer
Q4. What with you is system
Add your answer
Q5. Your preferred annual salary
Add your answer
Q6. Finaly my selection at the same place
Add your answer
Q7. Conditionals formatting,formula of excel
Add your answer
Q8. You know pivot table
Ans. 
Yes, I am familiar with pivot tables and have experience using them in Excel.
• Pivot tables are used to summarize and analyze large datasets in Excel.

• They allow you to rearrange and summarize data to extract useful information.

• You can easily create pivot tables by selecting your data and inserting a pivot table.

• You can then drag and drop fields to analyze data in different ways.

• For example, you can use a pivot table to a
Answered by AI
Add your answer