Columbus Global System Consultant Interview Questions and Answers

Q1. What languages do you know? Asked about the project I did and various clarification questions on that.
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Q2. What are various assumption you made while implementing this project.
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On python and sql coding.they ask simple to complex questions

Q1. On data science machine learning
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There were 3 rounds for data science consultant position at Equifax. 1st round consists of Python and SQL questions and also in this round they have tested analytical thinking as well.

In 2nd round they have asked me questions from my resume and asked me to explain the projects which I have worked on in previous company. In this round they have asked me pandas related questions and asked me write code.

Q1. In Managerial round again here I have been asked questions related my projects. and no coding round in this stage.
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Q1. Introduce yourself and explain your carrier
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Q2. B. Tech with 11 years of experience on Linux Administration/Devops/Ansible/Puppet/Cloud administration/ AWS/Openstack
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Q1. What is Tuples? How do you convert a string to a tuple?
Ans. 
Tuples are immutable sequences of elements. A string can be converted to a tuple using the tuple() function.
• Tuples are similar to lists but are immutable

• Elements of a tuple are enclosed in parentheses ()

• A string can be converted to a tuple using the tuple() function

• Each character in the string becomes an element in the tuple
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Q2. What is Left Join? Show one Left join for 2 data frames on Python
Ans. 
Left join is a type of join operation in SQL that returns all the rows from the left table and matching rows from the right table.
• Left join is performed using the 'left join' keyword in SQL

• In Python, left join can be performed using the 'merge' function from the pandas library

• Syntax: pd.merge(left_dataframe, right_dataframe, how='left', on='key_column')

• Example: pd.merge(df1, df2, how='left', on='id')
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Q1. Explain the Architecture on current role
Ans. 
The architecture of my current role involves designing and implementing software solutions for clients.
• Designing and implementing software solutions for clients

• Working closely with clients to understand their needs and requirements

• Collaborating with cross-functional teams to ensure successful project delivery

• Utilizing various programming languages and technologies to build scalable and efficient solutions
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Q2. How to make the SAN disk online when it get failed error in cluster service
Ans. 
To make a SAN disk online after a failed error in cluster service, follow these steps:
• Identify the failed disk using the cluster management console

• Check the disk status and resolve any issues

• If the disk is still offline, try bringing it online manually

• If manual attempts fail, try restarting the cluster service

• If all else fails, replace the failed disk with a new one
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Q3. What is the reason for using CFS in hyper V
Ans. 
CFS is used in Hyper-V to improve virtual machine performance by reducing CPU overhead.
• CFS stands for Completely Fair Scheduler.

• It is a Linux kernel feature that helps distribute CPU resources fairly among processes.

• When used in Hyper-V, CFS can help reduce CPU overhead and improve virtual machine performance.

• CFS can also help prevent CPU resource starvation and improve overall system stability.

• CFS is enabled by defaul...read more
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