Sema4 Interview Questions

Overview

sema4 is a patient-centered predictive health company and a leader in diagnostic testing. the company is founded on the idea that more information, deeper analysis, and increased engagement will improve the diagnosis, treatment, and prevention of disease. a mount sinai health system venture based in stamford, connecticut, sema4 is enabling physicians and patients to more seamlessly engage the digital universe of data, from genome test results and clinical records to wearable sensor metrics and more. we currently offer advanced genome-based diagnostics for reproductive health and oncology and are building predictive models of complex disease. sema4 believes that patients should be treated as partners, and that data should be shared for the benefit of all. at sema4, we utilize state-of-the-art technologies, and are continuously developing new tests to support patient care. we understand the complexity that comes with navigating the world of genetics and genomics—including test ordering,

Sema4 Interview Guides

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Machine Learning
(17)
Data Structures & Algorithms
(14)
SQL
(11)
Behavioral
(6)
Probability
(4)

Challenge

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Sema4 Interview Questions

Practice for the Sema4 interview with these recently asked interview questions.

QuestionTopicDifficulty
SQL
Easy

Write a SQL query to select the 2nd highest salary in the engineering department.

Note: If more than one person shares the highest salary, the query should select the next highest salary.

Example:

Input:

employees table

Column Type
id INTEGER
first_name VARCHAR
last_name VARCHAR
salary INTEGER
department_id INTEGER

departments table

Column Type
id INTEGER
name VARCHAR

Output:

Column Type
salary INTEGER
SQL
Hard
SQL
Medium
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Sema4 Salaries by Position

Software Engineer*
$121K
$131K
Software Engineer
Median: $126K
Mean (Average): $126K
Data points: 2

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

From the graph we can see that on average the Software Engineer role pays the most with a $126,000 base salary while the Software Engineer role on average pays the least with a $126,000 base salary.

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