Nasdaq Interview Questions

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Data Structures & Algorithms
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Behavioral
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Machine Learning
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Data Modeling
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Nasdaq Interview Questions

Practice for the Nasdaq interview with these recently asked interview questions.

QuestionTopicDifficulty
SQL
Hard

Given a table of product subscriptions with a subscription start date and end date for each user, write a query that returns true or false whether or not each user has a subscription date range that overlaps with any other completed subscription.

Completed subscriptions have end_date recorded.

Example:

Input:

subscriptions table

Column Type
user_id INTEGER
start_date DATETIME
end_date DATETIME
user_id start_date end_date
1 2019-01-01 2019-01-31
2 2019-01-15 2019-01-17
3 2019-01-29 2019-02-04
4 2019-02-05 2019-02-10

Output:

user_id overlap
1 1
2 1
3 1
4 0
Data Structures & Algorithms
Medium
Data Structures & Algorithms
Easy
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Nasdaq Salaries by Position

$88K
$159K
ML Engineer
Median: $143K
Mean (Average): $131K
Data points: 4
$61K
$177K
Software Engineer
Median: $100K
Mean (Average): $109K
Data points: 36
Business Analyst*
$83K
Business Analyst
Median: $83K
Mean (Average): $83K
Data points: 1

Most data science positions fall under different position titles depending on the actual role.

From the graph we can see that on average the ML Engineer role pays the most with a $131,249 base salary while the Business Analyst role on average pays the least with a $83,000 base salary.

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