Pre-employment Skills Assessment

The GraphQL assessment is a meticulously developed evaluation tool aimed at measuring job candidates' expertise and practical proficiency in GraphQL technologies. Focusing on advanced problem-solving capabilities, this test covers a range of topics from query optimization to security and integration challenges, providing a holistic view of a candidate's skills in developing and managing GraphQL APIs. It is tailored for those seeking to hire experts capable of utilizing GraphQL to its full potential in creating efficient, flexible, and scalable APIs.






10 min

Test type


About the test

This comprehensive assessment is carefully designed to evaluate job candidates' deep understanding and practical skills in GraphQL, an essential technology in the modern web development landscape. GraphQL, developed by Facebook, provides a more efficient, powerful, and flexible approach to building APIs, compared to traditional REST APIs. Thus, assessing knowledge in GraphQL is not merely about checking familiarity with its syntax but involves understanding its operational dynamics, efficiency in data retrieval, and ability to handle real-world challenges in data manipulation and API design. Over the course of this examination, candidates will encounter a series of advanced-level questions that delve into complex query formations, schema design, error handling, performance optimization, security practices, and the integration capabilities of GraphQL with various data sources and platforms. The objective of this test is to identify those who are not just theoretically proficient but also demonstrate practical aptitude in leveraging GraphQL to develop highly scalable and maintainable APIs, making them invaluable assets in roles that demand cutting-edge web development skills. Moreover, the test probes into advanced concepts like subscription management, handling nested queries, and implementing server-side optimizations, thereby ensuring that candidates are well-versed with all dimensions of GraphQL, making it a comprehensive evaluation tool for expert-level proficiency.

This test is relevant for

Backend Developer
Specializes in server-side logic, database interactions, and the integration of user-facing elements developed by front-end developers, with a focus on GraphQL API development and maintenance.
Full-Stack Developer
Responsible for developing and designing front end web architecture, ensuring the responsiveness of applications, and working alongside graphic designers for web design features, using GraphQL to connect between front end and backend systems.
API Developer
Focuses on designing and implementing API solutions and strategy, mastering GraphQL to enable seamless data interaction and retrieval between servers and clients.
Data Engineer
Builds and maintains the architecture, such as databases and large-scale processing systems, for data ingestion, processing, and deployment, utilizing GraphQL for efficient data query and manipulation.
System Integrator
Specializes in implementing, planning, coordinating, and managing the integration of new applications into existing systems and software throughout the enterprise, incorporating GraphQL to streamline data exchange and system communication.

Skills measured

Efficient Data Retrieval
Mastering the craft of structuring queries to fetch exactly what is needed, minimizing bandwidth usage, and optimizing response times.
Schema Design
Creating and managing a clearly defined schema that dictates how data is structured, queried, and mutated, ensuring a robust and scalable GraphQL API.
Error Handling
Implementing strategies for managing and reporting errors in a way that aids debugging and ensures graceful degradation of service.
Security Practices
Understanding and applying security measures such as authentication, authorization, and data validation to protect the API from common vulnerabilities.
Performance Optimization
Analyzing and implementing solutions to improve API performance, such as query optimization, caching, and avoiding the N+1 problem.
Real-time Data Management
Utilizing subscriptions and other GraphQL features to manage and deliver real-time data updates efficiently.

Sample questions

Preview a few questions that can be found in this test.
GraphQL Test Preview
Question 1/3
What is the primary reason for using GraphQL over traditional REST APIs?
Select all that apply
Higher performance due to binary transfer
Higher performance due to binary transfer
More flexible and efficient data retrieval
More flexible and efficient data retrieval
Strictly typed schema leads to less maintenance
Strictly typed schema leads to less maintenance
GraphQL can automatically update client data
GraphQL can automatically update client data

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