Blazeclan Technologies Interview Questions, Process, and Tips

Q1. Scenario based questions on AKS
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Q1. How the ETL works
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ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database or data warehouse.
• Extract: Data is extracted from multiple sources such as databases, files, APIs, etc.

• Transform: Data is cleaned, standardized, and transformed into a consistent format to meet the requirements of the target system.

• Load: The transf...read more
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Q1. Which transformation you have used in your recent project
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Q1. What is your salary expectation
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Q1. Tell me about the last project
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Q2. Tools Work on last organization
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I used a variety of tools in my last organization including AWS, Azure, and Google Cloud Platform.
• Utilized AWS for cloud storage and computing services

• Worked with Azure for virtual machines and networking

• Managed Google Cloud Platform for data analytics and machine learning
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Q1. Tell me about yourself
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Q1. How to create VPC?
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Creating a VPC involves defining IP address ranges, subnets, route tables, and security groups.
• Define IP address ranges for the VPC

• Create subnets within the VPC

• Set up route tables to control traffic within the VPC

• Configure security groups to control inbound and outbound traffic
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Q2. How to add plugin in jenkins
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To add a plugin in Jenkins, you can use the Jenkins web interface or manually upload the plugin file.
• Navigate to Jenkins dashboard and click on 'Manage Jenkins'

• Select 'Manage Plugins' and go to 'Available' tab

• Search for the desired plugin, select it, and click 'Install without restart'

• Alternatively, you can manually upload the plugin file under 'Advanced' tab in 'Upload Plugin' section
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2 coding questions were asked followed by some technical mcq.

Q1. About project and new technology as I knew about blockchain..DSA questions were also asked..Interview went about 40 minutes.
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Q1. It was managerial round were DSA questions and few HR questions were asked to me. It went for 30 minutes.
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Q1. Around 5 minutes interview were HR questions were asked.
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Q1. What is over-fitting and under-fitting? How do you deal with it?
Ans. 
Over-fitting is when a model is too complex and fits the training data too well, while under-fitting is when a model is too simple and cannot capture the underlying patterns in the data.
• Over-fitting occurs when a model is trained too much on the training data and starts to memorize it instead of learning the underlying patterns.

• Under-fitting occurs when a model is too simple and cannot capture the complexity of the dat...read more
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Q2. What are lable-encoding and one-hot encoding? when to use one over other?
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Label encoding and one-hot encoding are techniques used to convert categorical data into numerical data.
• Label encoding assigns a unique numerical value to each category in a feature.

• One-hot encoding creates a binary vector for each category in a feature.

• Label encoding is useful when the categories have an inherent order or hierarchy.

• One-hot encoding is useful when the categories are unordered or when the number of cate...read more
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Q3. Write a python function to check if the input number is prime or not?
Ans. 
Python function to check if a number is prime or not
• Check if number is less than 2, return False

• Check if number is divisible by any number from 2 to its square root, return False

• Else, return True
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Q4. Write a python function to check if the input number is palindrome or not?
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Python function to check if a number is palindrome or not.
• Convert the number to a string

• Reverse the string

• Compare the reversed string with the original string

• Return True if they are equal, else False
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Q5. What are different storage types/classes in AWS S3?
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AWS S3 has 6 storage classes: S3 Standard, S3 Intelligent-Tiering, S3 Standard-Infrequent Access, S3 One Zone-Infrequent Access, S3 Glacier, and S3 Glacier Deep Archive.
• S3 Standard: for frequently accessed data

• S3 Intelligent-Tiering: automatically moves data to the most cost-effective tier

• S3 Standard-Infrequent Access: for long-lived, infrequently accessed data

• S3 One Zone-Infrequent Access: for infrequently accessed da...read more
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Q6. What is AWS SageMaker DataWrangler?
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AWS SageMaker DataWrangler is a data preparation service that helps to clean and normalize data for machine learning.
• It provides a visual interface to explore, transform, and combine data from various sources.

• It supports a wide range of data formats and can handle missing or inconsistent data.

• It generates code in Python or PySpark for reproducibility and scalability.

• It integrates with other AWS services like SageMaker
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Q7. What is a docker image? and how do you check the running containers?
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A docker image is a lightweight, standalone, executable package that includes everything needed to run an application.
• Docker images are created using a Dockerfile which contains instructions for building the image.

• Images can be stored in a registry and pulled to run on any machine with Docker installed.

• To check running containers, use the command 'docker ps' which lists all running containers.

• To see all containers, inc
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Q8. What is a layer in aws lambda?
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A layer in AWS Lambda is a distribution mechanism for libraries, custom runtimes, and other function dependencies.
• Layers can be used to manage dependencies for multiple functions.

• They can be created and managed in the AWS Management Console or through the AWS CLI.

• Layers can be shared across multiple AWS accounts and regions.

• They can be used to separate code from configuration and make it easier to update dependencies.

• E...read more
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Q9. What are some metrics for regression problems?
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Metrics for regression problems
• Mean Squared Error (MSE)

• Root Mean Squared Error (RMSE)

• Mean Absolute Error (MAE)

• R-squared (R²) score

• Coefficient of Determination

• Explained Variance Score
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Q10. What are args and kwargs in python?
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args and kwargs are special syntax in Python used to pass a variable number of arguments to a function.
• args is used to pass a variable number of non-keyword arguments to a function

• kwargs is used to pass a variable number of keyword arguments to a function

• args is represented by an asterisk (*) and kwargs is represented by two asterisks (**)

• args and kwargs can be used together in a function definition

• Example: def my_func
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Q1. What is a decorators in python
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Decorators are a way to modify or enhance the behavior of a function or class without changing its source code.
• Decorators are defined using the '@' symbol followed by the decorator name.

• They can be used to add functionality to a function or class, such as logging or timing.

• Decorators can also be used to modify the behavior of a function or class, such as adding caching or memoization.

• Multiple decorators can be applied ...read more
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Q2. What is a generators in python
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Generators are functions that allow you to declare a function that behaves like an iterator.
• Generators use the yield keyword to return a generator object that can be iterated over.

• They allow for lazy evaluation, meaning that they only generate values as needed.

• Generators are memory efficient as they do not store all values in memory at once.

• They can be used to generate an infinite sequence of values.

• Example: def my_gen...read more
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