Zoom Interview Questions

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Data Structures & Algorithms
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SQL
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Machine Learning
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Probability
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Statistics
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Zoom Interview Questions

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

QuestionTopicDifficulty
SQL
Easy

Given a table of transactions, write a query to find the average quantity of each product purchased per transaction each year.

The output should include the year, product_id, and average quantity of the product purchased per transaction that year. The output table should be sorted by year and product_id in ascending order. The value for avg_quantity should be rounded to two decimal places.

Example:

Input: transactions table

Columns Type
id INTEGER
user_id INTEGER
created_at DATETIME
product_id INTEGER
quantity INTEGER

Output:

Columns Type
year INTEGER
product_id INTEGER
avg_quantity DECIMAL
Statistics
Easy
Machine Learning
Easy
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Zoom Salaries by Position

$104K
$217K
ML Engineer
Median: $170K
Mean (Average): $162K
Data points: 12
$121K
$167K
Data Scientist
Median: $154K
Mean (Average): $149K
Data points: 6
Product Manager*
$127K
$170K
Product Manager
Median: $149K
Mean (Average): $149K
Data points: 2
$83K
$199K
Software Engineer
Median: $140K
Mean (Average): $144K
Data points: 67
Business Intelligence*
$131K
Business Intelligence
Median: $131K
Mean (Average): $131K
Data points: 1
$83K
$154K
Data Engineer
Median: $125K
Mean (Average): $126K
Data points: 7
$72K
$104K
Business Analyst
Median: $80K
Mean (Average): $88K
Data points: 5

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 $161,883 base salary while the Business Analyst role on average pays the least with a $87,600 base salary.

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