Content updates: November-January, 2025

During the November-January quarter, HackerEarth focused on expanding content across different domains. We added new technical content in the following areas:

Question type	Count
Programming	5
Project	2
Multiple-choice questions (MCQ)	320
Subjective	15

Programming questions

Topic	Description
Arrays	Testing manipulation, traversal, and optimization techniques

Multiple-choice questions

Topic	Description
CEFR	Listening, Reading, Writing, and Speaking skills aligned with the Common European Framework of Reference for Languages (CEFR), including grammar usage, vocabulary range, comprehension ability, and structured communication across proficiency levels
Instrumentation and Control Engineering	Control systems, process instrumentation, sensors and transducers, industrial automation, PLC and SCADA systems, signal conditioning, feedback mechanisms, and system stability analysis
Electronics and Communication Engineering	Analog and digital electronics, communication systems, signal processing, microprocessors and microcontrollers, electromagnetic theory, VLSI basics, and wireless communication technologies
Electrical and Electronics Engineering	Circuit theory, electrical machines, power systems, control systems, power electronics, transformers, generation and transmission systems, and electrical measurements
Computer Science Engineering	Programming fundamentals, data structures, algorithms, operating systems, database management systems, computer networks, software engineering principles, and system design concepts
Civil Engineering	Structural analysis, construction materials, geotechnical engineering, transportation engineering, environmental engineering, fluid mechanics, and construction planning and management
Chemical Engineering	Thermodynamics, fluid mechanics, heat and mass transfer, chemical reaction engineering, process control, plant design, and industrial safety practices
Biotechnology Engineering	Cell biology, genetics, bioprocess engineering, molecular biology, microbiology, bioinformatics, fermentation technology, and biotechnological applications in healthcare and agriculture
Cloud Fundamentals	Cloud computing models (IaaS, PaaS, SaaS), virtualization concepts, cloud architecture, storage and networking basics, security principles, deployment models (public, private, hybrid), and cost optimization strategies
C#	Object-oriented programming concepts, .NET framework fundamentals, exception handling, LINQ, asynchronous programming, web API development, and application architecture design
Python	Syntax and core programming concepts, data structures, object-oriented programming, exception handling, file operations, libraries and frameworks, scripting, and basic data analysis and automation

Subjective questions

Topic	Description
CEFR	Listening, Reading, Writing, and Speaking skills aligned with the Common European Framework of Reference for Languages, including grammar accuracy, vocabulary range, comprehension ability, and structured communication across proficiency levels
Snowflake	Cloud-based data warehousing platform covering data storage, data sharing, SQL-based analytics, data pipelines, performance optimization, security, and scalable architecture for structured and semi-structured data
Microsoft Azure	Cloud computing services, including virtual machines, storage solutions, networking, identity management, cloud security, DevOps services, serverless computing, and architecture design for scalable and reliable applications

New additions in the Project question type

React libraries

HackerEarth has introduced modern React state management libraries to improve the coverage of project-based assessments.

Topic	Description
Immutable.js	Persistent immutable data structures for JavaScript applications, structural sharing, performance optimization, and predictable state management
Recoil	State management library for React using atoms and selectors, supporting derived state, asynchronous data handling, and scalable global state architecture
Zustand	Lightweight React state management using hooks, centralized store creation, middleware support, and minimal boilerplate implementation

Feature swap

Candidates will be given a problem statement for a web application that requires an update or modification to existing features. They will be assessed on their understanding of current functionality, impact analysis, and implementation approach.