---
id: 67b336b2abc639dda752f06f
title: Task 86
challengeType: 19
dashedName: task-86
lang: en-US
---

<!-- READING -->

# --instructions--

Read the text and answer the question below.

# --questions--

## --text--

Following their conversation, Mark sent a document to Sarah to update her on the improvements.

`Overview`

`The goal was to improve the performance of our app by speeding up the database queries. This change will help the app run faster and more efficiently.`

`Actions Taken`

`- Code Optimization: I reviewed the code that handles the database queries and optimized it to reduce delays. This ensures faster data retrieval and overall better performance.`

`- Comments Added: To make the code easier to understand, I added comments explaining the logic behind the changes. It will help the team when reviewing the code and when we need to make changes later on.`

`- Testing: I ran a series of tests to verify that the changes worked as expected. This testing process also helps us catch problems early, ensuring that the app remains stable.`

`Results`

`The improved queries should now make the app run faster. It is a big step toward a more responsive system.`

What did Mark do to optimize the performance of the app?

## --answers--

He added more comments to the code.

### --feedback--

Adding comments helps with understanding the code, but it doesn't focus on performance optimization.

---

He added new features to the app.

### --feedback--

There is no mention of adding new features.

---

He conducted tests to ensure everything was working.

### --feedback--

While testing is part of the process, the optimization of performance is not specifically related to testing.

---

He reviewed and optimized the code handling database queries.

## --video-solution--

4

# --explanation--  

To find the correct answer, focus on the action Mark lists regarding the optimization.  

Pay attention to `I reviewed the code that handles...` and `This ensures faster...` – These phrases will help you understand how he optimized the platform.  
