Open Financial Technologies Private Limited Devops Engineer Interview Questions and Answers for Freshers

DHCP assigns IP addresses to devices on a network, while DNS resolves domain names to IP addresses.

• DHCP dynamically assigns IP addresses to devices on a network

• DNS resolves domain names to IP addresses

• DHCP is used for automatic IP address configuration

• DNS is used for translating domain names to IP addresses

• DHCP operates at the network layer (Layer 3)

• DNS operates at the application layer (Layer 7)

Networking protocols and their respective port numbers are essential for communication between devices.

• HTTP - Port 80

• HTTPS - Port 443

• FTP - Port 21

• SMTP - Port 25

• SSH - Port 22

• DNS - Port 53

High Level Design (HLD) round with system design involves designing the overall architecture of a system.

• Understand the requirements and constraints of the system

• Identify the key components and their interactions

• Design the data flow and communication between components

• Consider scalability, reliability, and performance

• Create diagrams to visualize the architecture, such as UML diagrams or flowcharts

Design an ad-click aggregation service for tracking and analyzing ad clicks.

• Use a distributed system to handle high volume of ad click data

• Implement real-time processing for immediate insights on ad performance

• Utilize a database to store aggregated ad click data for reporting and analysis

I am a passionate software engineer with experience in developing web applications using various technologies.

• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MySQL and MongoDB

• Familiar with version control systems like Git and project management tools like Jira

Design a system to rate and review products or services.

• Allow users to rate products on a scale of 1-5 stars.

• Include written reviews for users to provide more detailed feedback.

• Implement a system to filter and display reviews based on relevance or helpfulness.

• Consider incorporating user profiles and past review history to personalize recommendations.

Design a high-performance in-memory cache system for storing and retrieving data efficiently.

• Use a hash table or a key-value store to store data in memory

• Implement caching strategies like LRU (Least Recently Used) or LFU (Least Frequently Used) to manage cache eviction

• Consider using a distributed cache for scalability and fault tolerance

• Optimize cache size and expiration policies based on the application's data access