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To find the nth salary in a dataset
Sort the dataset in descending order based on salary
Remove duplicates if necessary
Return the salary at index n-1
I applied via Approached by Company and was interviewed before Apr 2023. There was 1 interview round.
Implement lag() and lead() functions without using lag() or lead()
To implement lag(), shift the values in the array by one position to the right
To implement lead(), shift the values in the array by one position to the left
For example, to implement lag() on [1, 2, 3, 4], you can shift the values to get [null, 1, 2, 3]
For lead(), you can shift the values to get [2, 3, 4, null]
Optimising a query involves identifying bottlenecks and improving efficiency.
Identify slow-performing queries using tools like query execution plans.
Optimize database indexes to speed up query performance.
Limit the number of columns and rows returned in the query.
Avoid using SELECT * and instead specify only the necessary columns.
Use appropriate data types and avoid unnecessary data conversions.
Consider denormalizing d...
Replace 'b' with 'v' in the 3rd position of each string in an array
Iterate through each string in the array
Check if the 3rd position contains 'b'
If yes, replace 'b' with 'v'
I am a data analyst with experience in analyzing and interpreting complex data sets to drive business insights.
Experienced in using statistical analysis tools such as Python, R, and SQL
Proficient in data visualization tools like Tableau and Power BI
Skilled in data cleaning, data mining, and data modeling techniques
Strong problem-solving and critical thinking skills
Effective communicator and team player
Example: I have w...
The biggest hurdle I faced during organizing the tech fest of my college was securing sponsorships.
Difficulty in convincing companies to sponsor the event
Limited budget for organizing a large-scale tech fest
Competition with other college events for sponsorships
Negotiating sponsorship deals and ensuring deliverables
Finding sponsors aligned with the theme and objectives of the tech fest
Yes, pursuing an MBA can enhance my skills and open up new career opportunities.
An MBA can provide a strong foundation in business and management principles.
It can help develop analytical and problem-solving skills.
An MBA can broaden my network and provide access to valuable connections.
It can open up leadership roles and higher-level positions in organizations.
Having an MBA can increase earning potential and job prosp...
Yes, Reliance Fresh should open a store in the north-eastern part of India.
The north-eastern part of India has a growing population and increasing consumer demand.
Reliance Fresh can tap into the untapped market potential in the region.
Opening a store in the north-eastern part of India can help Reliance Fresh expand its presence and increase its market share.
Reliance Fresh can leverage its existing supply chain and dist...
The number of people travelling by local metro in Mumbai is estimated to be in millions.
Mumbai has a population of over 20 million people.
The local metro is a popular mode of transportation in Mumbai.
During peak hours, the metro trains are usually crowded.
The metro network in Mumbai is extensive, covering various parts of the city.
The number of daily commuters on the metro can be estimated based on population density a
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I applied via Walk-in and was interviewed in Apr 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed in Dec 2016. There were 6 interview rounds.
I applied via Campus Placement
I applied via Referral and was interviewed before Apr 2022. There were 3 interview rounds.
I applied via Company Website
Create a function to generate a transaction bin column based on transaction amounts.
Create bins based on transaction amounts (e.g. $0-$100, $101-$200, etc.)
Use pandas cut() function in Python to create bins
Assign bin labels to the transactions based on the bin ranges
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