Cogito Tech Freelancer Interview Questions and Answers

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. Describe yourself
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Q1. What do you know about Sales?
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Q1. It was a Situational Sale Question.
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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. What is zero coupon bond?
Ans. 
A zero coupon bond is a bond that pays no interest and is sold at a discount to its face value.
• Zero coupon bonds are also known as discount bonds.

• Investors buy these bonds at a price lower than their face value and receive the full face value at maturity.

• The difference between the purchase price and the face value is the investor's return.

• Zero coupon bonds are often used for long-term investments, such as retirement sa...read more
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Q2. What is corporate actions and how you record those in books?
Ans. 
Corporate actions are events initiated by a company that can affect its stock price and shareholders. They are recorded in books through various accounting entries.
• Corporate actions include stock splits, dividends, mergers, acquisitions, and spin-offs.

• These actions are recorded in books through journal entries and adjustments to accounts such as retained earnings and stockholders' equity.

• For example, if a company decla...read more
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Create and explain project

Q1. Data Engineering + Cloud related concept & questions
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Q1. Data Engineering[ETL/Datawarehouse/Cloud] related questions in deep
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Q1. Discussion about salary
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