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Verily Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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Given a dictionary with weights, write a function <code>random_key</code> that returns a key at random with a probability proportional to the weights.

Example 1:

Input:

<pre tabindex="0" class="chroma"><code>weights = {&#39;A&#39;: 1, &#39;B&#39;: 2}
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>random_key(weights) -&gt; return A 1/3 of the time, B 2/3 of the time
</code></pre>

Example 2:

Input:

<pre tabindex="0" class="chroma"><code>weights = {&#39;A&#39;: 1, &#39;B&#39;: 1}
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>random_key(weights) -&gt; return A 1/2 of the time, B 1/2 of the time
</code></pre>

Weighted Keys

Python & General Programming

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Verily Salaries by Position

Get AI-powered advice on this job and more exclusive features. <h5>Pay found in job post </h5>Retrieved from the description. <h5>Base pay range </h5>$140,000.00/yr - $200,000.00/yr Who We Are Verily is a subsidiary of Alphabet that is using a data-driven approach to change the way people manage their health and the way healthcare is delivered. Launched from Google X in 2015, our purpose is to bring the promise of precision health to everyone, every day. We are focused on generating and activating data from a variety of sources, including clinical, social, behavioral and the real world, to arrive at the best solutions for a person based on a comprehensive view of the evidence. Our unique expertise and capabilities in technology, data science and healthcare enable the entire healthcare ecosystem to drive better health outcomes. Description As a Senior Data Scientist at Verily, you will be supporting our core mission to drive innovation in evidence generation for research and care decisions. We are building new types of longitudinal datasets that have foundations of RWD sources, such as EHRs (electronic health records) and claims data, and are augmented with prospective data collection. You will develop and deploy models that enable scalable curation of RWD. This will include multi-source integrations and reconciliations, creating derived features from the source data (e.g., abstraction of clinical concepts from unstructured data), and facilitating data quality assessments. You will work with a diverse cross-functional team to build reusable and scalable tools and to deliver products that unlock information from structured and unstructured clinical data. Responsibilities <ul><li>Collaborate with cross-functional teams to conceptualize, develop, and implement AI solutions tailored to diverse healthcare applications. </li><li>Architect and implement foundational models and large language model (LLM) based agents to achieve optimal performance and efficiency. </li><li>Conduct cutting-edge research and stay informed on emerging advancements in LLMs, medical foundational models, and AI agents. </li><li>Effectively communicate complex technical methodologies and results through clear, well-structured reports and presentations for both technical and non-technical audiences. </li></ul>Qualifications Minimum Qualifications <ul><li>Advanced degree in a quantitative discipline (e.g., statistics, computer science, applied mathematics, or similar) or equivalent practical experience. </li><li>5+ years of experience with applying ML in digital health applications. </li><li>Direct experience working with LLM and familiar with various prompt optimization technologies. </li></ul>Preferred Qualifications <ul><li>Ph.D. in Computer Science or Engineering. </li><li>5+ years of experience with LLM models, including prompting, fine-tuning and retrieval augmented generation (RAG). </li><li>Familiarity with software engineering principles and experience deploying algorithms in production environments. </li><li>Experience developing transformer based deep learning algorithms using TensorFlow or PyTorch, and knowledge of latest architectures. </li></ul>This role is eligible for Verily-sponsored immigration support. The US base salary range for this full-time position is $140,000 - $200,000 + bonus + benefits. Our salary ranges are determined by role, level, and location. The range displayed on each job posting reflects the minimum and maximum target for new hire salaries for the position across all US locations. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training. Your recruiter can share more about the specific salary range for your preferred location during the hiring process. Please note that the compensation details listed in US role postings reflect the base salary only, and do not include bonus, equity, or benefits. <h5>Seniority level </h5><ul> <li><h5>Seniority level </h5>Mid-Senior level </li></ul> <h5>Employment type </h5><ul> <li><h5>Employment type </h5>Full-time </li></ul> <h5>Job function </h5><ul> <li><h5>Job function </h5>Engineering and Information Technology </li><li> <h5>Industries </h5>Hospitals and Health Care </li></ul> Referrals increase your chances of interviewing at Verily by 2x Get notified about new Senior Data Scientist jobs in Boston, MA. <h5>Lead Director Price and Promotions Data Science </h5>Wellesley Hills, MA $144,200 - $288,400 1 week ago <h5>Senior Research Associate - Non-viral Delivery </h5><h5>Senior Business Analyst, Data Product Solutions </h5><h5>Senior Research Associate - Non-viral Delivery </h5><h5>Staff Data Scientist, Research, Search Platforms </h5>Cambridge, MA $197,000 - $291,000 1 week ago <h5>Senior Staff Data Scientist, Search Platforms </h5>Cambridge, MA $248,000 - $349,000 1 week ago Were unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr

Question	Topic	Difficulty	Ask Chance
Weighted Keys	Python & General Programming	Medium	Very High
Boarding Times Bias	Statistics	Medium	High
Hundreds of Hypotheses	Statistics	Medium	High

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