What interview questions does Meta ask DevOps Engineers?

Tryprepforge has 19 real Meta DevOps Engineer interview questions covering coding, system design, and behavioral topics. Practice with AI-powered walkthroughs and solutions.

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Meta DevOps Engineer Interview Questions

44 practice questions for Meta DevOps Engineer interviews

Meta DevOps engineer interviews cover CI/CD pipelines, infrastructure as code, container orchestration, monitoring, and incident response procedures.

Coding

Technical

coding Hard Verified Question #1

1. OA[CodeSignal] Cloud File Storage System

Category: Graph coding problem

Question Your task is to implement a simple in-memory cloud storage system that maps objects (files) to their metadata (name, size, etc.). You...

Input: Graph (nodes and edges)
Output: Array

coding Hard Verified Question #2

2. OA[CodeSignal] Design Banking System

Category: Graph coding problem

Question Design a banking system that supports account management, transactions, and various financial operations.

Input: Graph (nodes and edges)
Output: Computed result

coding Medium Verified Question #3

3. Friend Requests Sent

Category: Algorithm coding problem

Question Given a list of ages representing users in a social network, calculate the total number of friend requests each user will send based on...

Input: List
Output: Computed result

coding Hard Verified Question #4

4. Minimum Prefix Subset

Category: Tree coding problem

Question Given a list of strings, find the minimum subset of prefixes that can represent the entire input set. A string is "represented" if it...

Input: Array of strings
Output: Integer

coding Medium Verified Question #5

5. Shortest Substring with Alphabet

Category: Sliding window coding problem

*This is a popular twist Meta interviewers often put on the classic leetcode problem to find a minimum window substring.* Given an input string and...

Input: String
Output: Integer

coding Medium Verified Question #6

6. Shortest Substring with N Unique Characters

Category: String coding problem

Shortest Substring with N Unique Characters *This is a variation of the leetcode problem* Given a string s and an integer n, find the length of...

Input: String
Output: Computed result

coding Hard Verified Question #7

7. OA[CodeSignal] In-Memory Database

Category: Graph coding problem

Description Implement a simplified in-memory database that supports record manipulation with various operations. The system should handle basic...

Input: Graph (nodes and edges)
Output: Array

coding Easy Verified Question #8

8. [CodeSignal] Count Non-Dominant Elements

Category: Array coding problem

Question Given an array of integers numbers, count all elements that are not equal to numbers[0] or numbers[1] (if those indices exist in the...

Input: Array of integers
Output: Computed result

coding Easy Verified Question #9

9. [CodeSignal] Sort Words By Vowel Consonant Difference

Category: Array coding problem

Question You are given a string text consisting of unique lowercase English words separated by spaces. For each word, compute the absolute...

Input: Array
Output:** Computed result

coding Medium Verified Question #10

10. [CodeSignal] Warehouse Robot Commands

Category: Matrix coding problem

Question In a highly automated warehouse, a robot organizes packages stored in a rectangular grid. The grid is represented as a 2D list of integers...

Input: Matrix (2D array)
Output: Computed result

coding Hard Verified Question #11

11. [CodeSignal] House Segments After Destruction

Category: Array coding problem

Question You are monitoring the building density in a district of houses. The district is represented as a number line, where each house is located...

Input: Array of integers
Output: Array

coding Medium Verified Question #12

12. Distribution Center Placement

Category: Array coding problem

A logistics company is expanding its distribution network along a single highway. You are given an array of integers locations representing the...

Input: Array of integers
Output: Computed result

coding Hard Verified Question #13

13. Expression Simplifier

Category: String coding problem

Given an algebraic expression string containing single lowercase-letter variables, the operators + and -, and parentheses ( and ), simplify...

Input: String
Output: Computed result

coding Medium Verified Question #14

14. Minimum Sum Tree Path

Category: Binary tree coding problem

Minimum Sum Tree Path

Input: Binary tree
Output: Computed result

technical Medium Verified Question #15

15. How to pass AI Enabled Coding Rounds From FAANG Interviewer

Category: Algorithm coding problem

Tips For AI Coding Rounds AI coding rounds are not as different from regular coding rounds as you might think. The interviewer still needs to get...

Input: Given input
Output: Computed result

system design Senior distributed systems #1

1. [OA] Distributed Config Manager — Design a configuration management system for Meta's distributed services

Meta's applications often rely on various configurations across multiple services. A robust configuration manager ensures that the services get the right configurations seamlessly. Your task is to design a ConfigManager class that handles configuration loading and updates.

Problem statement: Define the ConfigManager class that stores configurations for different services and provides methods to retrieve and update these configurations.

def __init__(self): Initializes the configuration manager.

def set_config(self, service_id: str, config: Dict[str, Any]) -> None: Sets or updates the configuration for a specific service.

def get_config(self, service_id: str) -> Dict[str, Any]: Retrieves the configuration for a specific service.

Example 1:
Input:

config_manager = ConfigManager(); config_manager.set_config('auth_service', {'retry_limit': 3}); config = config_manager.get_config('auth_service')

Output: {'retry_limit': 3}
Explanation: The configuration for 'auth_service' is correctly stored and retrieved.

Constraints:

1 <= service_id.length <= 100

The configuration dictionary size can be at most 10^4 key-value pairs.

system design Senior api design #2

2. [OA] Service Health Monitor — Design a health monitoring service for Meta's microservices architecture

In Meta's vast microservices ecosystem, persistent health monitoring is crucial to maintain service reliability and uptime. Your task is to design a class that implements a health monitoring system that tracks various services' health statuses.

Problem statement: Define a class HealthMonitor that allows registering services and conducting regular health checks.

def __init__(self): Initializes the health monitor.

def register_service(self, service_id: str) -> None: Registers a new service to monitor.

def health_check(self, service_id: str) -> bool: Conducts a health check and returns the service's health; returns True or False.

Example 1:
Input: monitor = HealthMonitor(); monitor.register_service('user_service'); status = monitor.health_check('user_service')
Output: True
Explanation: The user_service is registered and passes the health check.

Constraints:

1 <= service_id.length <= 100

Health checks should handle at least 10^5 service registrations.

coding Hard infra #3

3. [OA] Dockerfile Optimization — Write an optimized Dockerfile for a scalable Meta service

Meta utilizes microservices architecture where efficient container images are essential for quick deployments. Your task is to optimize a given Dockerfile for a service to reduce build time and image size.

Problem statement: Given a suboptimal Dockerfile, improve it by minimizing layer sizes, reducing image bloat, and implementing best practices for performance.

FROM base_image:latest Base image to start from.

RUN ... Command that installs dependencies.

COPY ... Command that copies application code.

ENTRYPOINT ... Command that defines the startup behavior of the container.

Example 1:
Input: Original Dockerfile has unnecessary dependencies and multiple RUN commands.
Output: Optimized Dockerfile reduces layers and improves efficiency.
Explanation: The optimized Dockerfile results in a smaller image with quicker build times.

Constraints:

The Dockerfile must be compatible with Meta's CI/CD pipeline for container deployment.

Aim for an image size under 100MB.

coding Hard ci cd #4

4. [OA] Terraform State Management — Implement a system to efficiently manage states in Meta's CI/CD pipeline

In Meta's infrastructure, managing Terraform state is critical to ensure deployments are reliable and reproducible. Your task is to implement a minimal Terraform state management system that handles resource states.

Problem statement: Write a class TerraformStateManager that keeps track of the state of various resources, allows updates to the state, and can retrieve states efficiently.

def __init__(self): Initialize the state manager.

def add_resource(self, resource_id: str, state: Any) -> None: Add or update a resource's state.

def get_resource(self, resource_id: str) -> Any: Retrieve the state of a specific resource.

Example 1:
Input:

manager = TerraformStateManager(); manager.add_resource('db_instance', {'status': 'running'}); state = manager.get_resource('db_instance')

Output: {'status': 'running'}
Explanation: The resource 'db_instance' is added and retrieved successfully.

Constraints:

1 <= resource_id.length <= 100

The state is any valid JSON compatible Python data structure.

The resource state should handle at most 10^4 resources.

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Meta DevOps Engineer Interview Questions

1. OA[CodeSignal] Cloud File Storage System

2. OA[CodeSignal] Design Banking System

3. Friend Requests Sent

4. Minimum Prefix Subset

5. Shortest Substring with Alphabet

6. Shortest Substring with N Unique Characters

7. OA[CodeSignal] In-Memory Database

8. [CodeSignal] Count Non-Dominant Elements

9. [CodeSignal] Sort Words By Vowel Consonant Difference

10. [CodeSignal] Warehouse Robot Commands

11. [CodeSignal] House Segments After Destruction

12. Distribution Center Placement

13. Expression Simplifier

14. Minimum Sum Tree Path

15. How to pass AI Enabled Coding Rounds From FAANG Interviewer

1. [OA] Distributed Config Manager — Design a configuration management system for Meta's distributed services

2. [OA] Service Health Monitor — Design a health monitoring service for Meta's microservices architecture

3. [OA] Dockerfile Optimization — Write an optimized Dockerfile for a scalable Meta service

4. [OA] Terraform State Management — Implement a system to efficiently manage states in Meta's CI/CD pipeline

Related Meta DevOps Engineer interview prep

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