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Capital One Interview Questions (Updated for 2025)

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Algorithms

Analytics

Machine Learning

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Product Metrics

Python

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You are given two lists: a full list and a missing list. The full list contains a list of integers, while the missing list contains all the integers from the full list except for one. Your task is to create a function that finds the missing element.

For example:

Example 1:

Input:

<pre tabindex="0" class="chroma"><code>full = [1, 2, 3, 4, 5]
missing = [1, 2, 3, 5]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>one_element_removed(full, missing) -&gt; 4
</code></pre>

Example 2:

Input:

<pre tabindex="0" class="chroma"><code>full = [4,-6,3,10,11,150,120]
missing = [4,-6,3,10,11,150]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>one_element_removed(full, missing) -&gt; 120
</code></pre>

Example 3:

Input:

<pre tabindex="0" class="chroma"><code>full = [17, 11, 15, 19, 21, 11]
missing = [17, 15, 19, 21, 11]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>one_element_removed(full, missing) -&gt; 11
</code></pre>

In this case, one of the 11’s is missing from the missing list. Your function should return the repeated number.

This question tests your ability to manipulate lists and use bitwise operations to solve a problem. You are given two lists, one with all integers and the other missing one integer from the full list. Your task is to create a function to find the missing integer.

Find the Missing Element

You work as a data scientist on a ride sharing marketplace.

<ol>
<li>What metrics would you look at to determine the demand for rides at any point?</li>

<li>What metrics would tell you if there is high demand and low supply? How can you determine the threshold for when there’s too much demand?</li>
</ol>

As a data scientist in a ride sharing marketplace, which metrics could help determine the demand for rides at any point?

As a data scientist in a ride sharing marketplace, which metrics could help determine the demand for rides at any point?

Demand Metrics I

In the context of a ride sharing marketplace, which situation would indicate a high demand and low supply?

In the context of a ride sharing marketplace, which situation would indicate a high demand and low supply?

Demand Metrics II

How would you identify supply and demand mismatch in a ride sharing market place?

Demand Metrics

Write a query to return pairs of projects where the end date of one project matches the start date of another project. 

Example:

Input:

<code>projects</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>title</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>start_date</code></td>
<td>DATETIME</td>
</tr>

<tr>
<td><code>end_date</code></td>
<td>DATETIME</td>
</tr>

<tr>
<td><code>budget</code></td>
<td>FLOAT</td>
</tr>
</tbody>
</table>
Output

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>project_title_end</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>project_title_start</code></td>
<td>VARCHAR</td>
</tr>

<tr>
<td><code>date</code></td>
<td>DATETIME</td>
</tr>
</tbody>
</table>

Project Pairs

Capital One Interview Questions

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