Coding
SOLID Principles Test
Identify and hire top developers with an online SOLID Principles Test that evaluates candidates’ understanding of object-oriented design principles, maintainable architecture, and clean coding practices. This assessment helps recruiters identify developers who can design scalable and maintainable software systems.
30 - 60 minutes
9,860 taken
4.7/5
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Trusted by 5,000+ leading companies worldwide
About the SOLID Principles Online Test
The SOLID Principles Test evaluates a candidate’s understanding of core object-oriented design principles used to build scalable, maintainable, and extensible software systems. The assessment measures knowledge of Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion principles through real-world coding scenarios and architecture-based questions.
Who Can Use Xobin's SOLID Principles Test?
Who Can Use Xobin's SOLID Principles Test?Important Note: These skills assessments are NOT for individual practice or preparation.
These skills assessments are designed exclusively for organizational use.
This assessment is specifically designed for:
Recruiters
Evaluate candidates’ technical and non-technical skills during the hiring process to ensure quality hires while reducing the overall time-to-hire.
HR Teams
Conduct comprehensive skill mapping and competency assessments for better workforce planning and effective talent management.
L&D Teams
Identify skill gaps, measure training effectiveness and design targeted learning & development programs for employees.
Perfect for Skill Mapping & Evaluation
Organizations use this assessment to objectively measure core competencies, benchmark team skills, make data-driven hiring decisions and identify training needs across departments.
Skills Covered in the Test
Single Responsibility Principle (SRP)
Open/Closed Principle (OCP)
Liskov Substitution Principle (LSP)
Interface Segregation Principle (ISP)
Dependency Inversion Principle (DIP)
Object-Oriented Design & Clean Architecture
Why Xobin's Assessment Matters
Every mis-hire costs your business time, money, and momentum. Our online assessments ensure you only hire candidates who can solve real-world challenges, contribute from Day 1, and scale with your vision.
5M+
4.9/5
84%
32 min
Types of Questions We Offer
Job Roles You Can Hire With Our SOLID Principles Skills Test
Xobin’s SOLID Principles Test is ideal for evaluating developers who need strong knowledge of software architecture and object-oriented design.
Powerful Features
Why Choose Xobin?
Xobin provides the world’s most comprehensive talent assessment platform with a vast library of 180,000+ tech and non-tech questions for every role, domain, and industry. Our advanced AI proctoring technology and enterprise-grade security help companies hire 20x faster and smarter.
Pre-built Customizable Testing
3,400+ skills assessments and 2,500+ role-specific assessments with full customization in 15 languages
AI Resume Screening & Fitment
Automated resume analysis with precise fitment scores, rich metadata and tailored interview questions
Advanced AI-Based Proctoring
Multi-layered security with face detection, eye detection, audio analysis, behavior monitoring and much more
Autonomous AI Interviews
24/7 AI-powered interviews with natural conversation flow and dynamic question adaptation
AI Assessment Building
JD-based assessment creation that analyzes skills and builds perfectly matched evaluations
AI Report Generation
Automated insights, recommendations and detailed analytics powered by generative AI, machine learning
Coding/Technical Assessments
50+ programming languages with real-time IDE and auto-scoring
Psychometric Testing
Big 5, DISC models with workplace adaptations and benchmarking
Communication Testing
AI-assisted evaluation of verbal and written communication skills
Enterprise-Grade Security & Compliance
Built with industry-leading security standards and comprehensive compliance certifications to protect your data and ensure global regulatory adherence.
CERTIFIED
SOC 2 Type II Certified
Industry-leading security controls and independent third-party auditing
ISO
ISO 27001 Compliance
International standards for information security management systems
GLOBAL
GDPR & CCPA Ready
Full compliance with global data protection and privacy regulations
WCAG
WCAG 2.1 AA Accessibility
Inclusive design ensuring accessibility for all users and abilities
SSO
Enterprise SSO Integration
SAML 2.0, Active Directory, and popular identity provider support
AES-256
Data Encryption & Security
AES-256 encryption at rest and TLS 1.3 for data in transit
Advanced AI Proctoring
How Xobin Prevents Cheating?
Xobin’s AI-powered proctoring system actively monitors candidate behavior in real time using facial recognition, eye tracking, audio analysis, device detection and much more preventing cheating while ensuring a secure and trustworthy environment for both candidate and employee evaluations. Reduce hiring risks and make confident talent decisions with secure, reliable candidate assessments.
EyeGazer Based Proctoring
Advanced eye-tracking technology to monitor gaze patterns and detect unauthorized activities
Lockdown Browser
Secure browser environment that prevents unauthorized access and activities
Question Randomization
Shuffles questions for every test session so no two candidates receive the same order, reducing cheating and improving test fairness
Plagiarism Detection
AI-powered content analysis to identify copied or duplicate code and written responses with detailed similarity reports
Non-Googleable Questions
Proprietary question bank with unique, scenario-based questions that cannot be found through search engines
Copy Paste Prevention
Comprehensive blocking of copy-paste operations, right-click context menus, and keyboard shortcuts during assessments
Absentee Detection
Advanced algorithms to detect when test-takers leave their seat or move away from the camera during the assessment
Screen Sharing & Recording
Live screen streaming with complete recording capabilities to monitor all on-screen activities and detect unauthorized applications
Browser Activity Monitoring
Comprehensive tracking of browser tabs, window switching, and navigation to detect and prevent access to unauthorized resources
Webcam Monitoring
Periodic snapshots and continuous video recording to capture test-taker behavior and verify identity throughout the assessment
Multiple Face Detection
Identifies when more than one person appears during the test, ensuring the candidate is alone and maintaining strict exam integrity
Multi-Device Detection
Identify and flag multiple devices being used simultaneously, including smartphones, tablets, and secondary monitors
Audio Analysis
Real-time monitoring and analysis of ambient sounds to detect conversations, external assistance, or suspicious background noise
Trust Score Algorithm
AI-powered scoring system that analyzes multiple behavioral patterns and proctoring data to generate a comprehensive integrity score
Need Expert Help?
Our assessment specialists are ready to guide you through test implementation, customization, and candidate evaluation strategies.
Enterprise-Grade Solution
Global Reach & Enterprise-Grade Scalability
Empowering top enterprises globally to hire top talents faster, smarter, and with confidence at scale.
5,000+
Global Customers
5M+
Assessments Conducted
24/7
Elite Support
Global Scale
Hire anywhere with multi-language support and seamless candidate experience.
Dedicated Data Centers
Separate data centers in EU, UK, USA, Middle East, and India for optimal performance
24x7 Elite Support
Premium 24x7 support via chat, email, and phone
API & Integrations
50+ native integrations and custom APIs for seamless workflow integration
Multi-AI Architecture
No vendor lock-in with OpenAI, Anthropic, Google models for enhanced reliability
Flexible Pricing
Custom enterprise pricing available
Test Details
Availability
Ready to use & customizable
Time
30 - 60 minutes
Level
Languages
English + 6 more
Spanish
French
Italian
Japanese
Dutch
Portuguese
Streamline Hiring in Just 4 Steps
Transform your recruitment from recieving the application of candidates to hire top talents with our complete hiring funnel
Smart Application Form (XoForm)
Application
Candidates start their journey with Xobin’s Smart Application Form, where they share their CV, cover letter, and a short video introduction. This gives recruiters deeper insights into the candidate’s personality, motivation, and communication style right from the start.
AI Screening & Level 1 Interview
AI + Interview
Xobin's AI-driven resume screening quickly filters candidates based on skills, experience, and intent. This is followed by a Level-1 interview, combining AI insights and recruiter evaluation to assess communication skills, technical foundation, and cultural fit ensuring every applicant gets a fair and unbiased evaluation.
Technical Skills Assessment
45min Test
Using Xobin's role-specific skill assessments, candidates take a 45-minute test designed to evaluate practical job-related abilities. With features like advanced AI proctoring, coding simulations, and real-world problem-solving tasks, recruiters can confidently shortlist candidates ready for the role.
Hiring Manager Interaction
Final Stage
The shortlisted candidates meet the Hiring Manager for an in-depth discussion. This stage explores team fit, growth potential, and impact, supported by Xobin's structured interview tools and analytics dashboard, helping teams make informed, data-backed hiring decisions.
Streamline Hiring in Just 4 Steps
Transform your recruitment from recieving the application of candidates to hire top talents with our complete hiring funnel
Smart Application Form (XoForm)
Candidates start their journey with Xobin’s Smart Application Form, where they share their CV, cover letter, and a short video introduction. This gives recruiters deeper insights into the candidate’s personality, motivation, and communication style right from the start.
AI Screening & Level 1 Interview
Xobin’s AI-driven resume screening quickly filters candidates based on skills, experience, and intent. This is followed by a Level-1 interview, combining AI insights and recruiter evaluation to assess communication skills, technical foundation, and cultural fit, ensuring every applicant gets a fair and unbiased evaluation.
Technical Skills Assessment
Using Xobin’s role-specific skill assessments, candidates take a 45-minute test designed to evaluate practical job-related abilities. With features like advanced AI proctoring, coding simulations, and real-world problem-solving tasks, recruiters can confidently shortlist candidates ready for the role.
Hiring Manager Interaction
The shortlisted candidates meet the Hiring Manager for an in-depth discussion. This stage explores team fit, growth potential, and impact, supported by Xobin’s structured interview tools and analytics dashboard, helping teams make informed, data-backed hiring decisions.
50+
4,900+
80%
5,000+
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Looking for Other Hiring Solutions?
Explore our comprehensive suite of hiring and assessment solutions designed to meet all your talent acquisition needs.
Job Role Based Assessments
2,500+ role-specific tests covering technical and non-technical positions across industries
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24/7 autonomous interviews with advanced AI agents for technical, non-technical and behavioral assessments
Video Based Assessments
AI-powered video interviews with emotion detection and communication analysis
Gamified Assessments
Engaging game-based evaluations that measure cognitive abilities and personality traits
Applicant Tracking System
Complete ATS solution with seamless integration and collaborative hiring workflows
White Labeling Solution
Fully customizable platform with your branding, domain, and complete white-label experience
Frequently Asked Questions
Get answers to common questions about our assessments and platform.
Ready to Transform Your Hiring Process?
Join 5,000+ companies worldwide that trust Xobin for developer hiring. With the SOLID Principles Test, you can confidently identify engineers who understand clean architecture and build scalable software systems.
No credit card required • 24/7 support • SOC2 & ISO certified
Get Diverse Assessment Types with Xobin
Whether you’re testing skills, behavior or situational judgment, Xobin brings a suite of innovative assessment types to help you find qualified, job-ready talent with ease.
Gamified Assessments
Hire smarter with game-powered insights. Xobin’s gamified tests boost engagement and reveal real problem-solving ability through game-like challenges.
Skills-Based Assessments
Measure what truly matters, "skills". Get accurate, job-ready insights into technical and cognitive abilities with Xobin’s 3400+ customizable skills tests.
Job Role-Based Assessments
Assess exactly what the role demands. Xobin’s 2500+ customizable job-specific tests ensure every candidate is evaluated on the skills and competencies that matter most.
Video-Based Assessments
See personality in action. Capture communication, confidence, and clarity through structured, AI-backed video responses.
Psychometric Assessments
Hire for culture and compatibility. Xobin’s psychometric tests uncover traits, behavior patterns, and working styles to build high-performing teams.
Image-Based Assessments
Evaluate visual reasoning with ease. Image-based tests measure observation, pattern recognition, and decision-making using structured visual cues.
Audio-Based Assessments
Assess listening and comprehension skills. Audio-based tests evaluate attention, interpretation, and clarity through real-time spoken inputs.
Scenario-Based Assessments
Test real decisions in real situations. Xobin’s scenario-based tests reveal how candidates think, react, and solve on-the-job challenges.
Adaptive Assessments
One test, multiple difficulty levels. Xobin’s adaptive engine adjusts in real time for more accurate, fair, and efficient skill measurement.
Advanced Reports & Analytics
Get comprehensive insights with our detailed test reports and performance analytics.
Sample Test Report Preview
CANDIDATE ASSESSMENT REPORT
Delphi Test
PERFORMANCE SUMMARY
87%
EXCELLENTComplete Assessment Report
Our comprehensive report provides detailed insights into candidate performance across all skill areas tested in the Delphi Test assessment.
Report Includes:
- Detailed performance breakdown by skill category
- Question-by-question analysis with explanations
- Time taken per question and section
- Benchmark comparison with industry standards
- Hiring recommendations and next steps
- Exportable PDF format for easy sharing
What Our Customers Say
Read authentic reviews and testimonials from companies that have transformed their hiring process with Xobin.
HR Manager
AVP HR, Digit Insurance
Senior Manager
3Cloud
Talent Acquisition Manager
Accellor
Director
Adaps
Client Services Manager
What do you like best about Xobin?
Because of Xobin we did the screening hussle-free and the candidates who score above a 60% marks gets shortlisted for the interview.
Business Technology Associate
What do you like best about Xobin?
What's best is that the xobin uses chat-based AI evaluation using Chat GPT 3.5. Furthermore, Ruchi is incredibly kind and she is alway willing to assist.
CEO
Zolostays
Manager
Sigma Infotech
Head - Quickwork Academy
Quickwork
Talent Acquisition Executive
What do you like best about Xobin?
Working with Sarthak was a pleasure because he is incredibly supportive and helpful and is always willing to help.
Human Resources Lead
What do you like best about Xobin?
The support team is available at all times. I appreciate your excellent presence, Sarthak.
Security QA Engineer
What do you like best about Xobin?
Coding challenges which are technically innovative, transparent, credible, and continuously monitored. The psychometric exams were also incredibly helpful for both freshers and experienced professionals. Customer Success team help's us in every situation which is really beneficial.
Assistant Manager
What do you like best about Xobin?
Xobin is ideal for organisations of any size. Xobin manages all aspects of screening using their Xoforms and Assessments. They have sophisticated tools, such as the Xoforms ATS, and many different kinds of assessments.
Project Coordinator
What do you like best about Xobin?
Xobin is ideal for organisations of any size. Xobin manages all aspects of screening using their Xoforms and Assessments. They have sophisticated tools, such as the Xoforms ATS, and many different kinds of assessments.
Senior Strategic Partnerships
Randstad India
Business Operations Associate
What do you like best about Xobin?
The best feature of xobin is the ability to invite candidates in large numbers. They provide limitless invitation and evaluation. The most useful assessments they have are their psychometric and coding tests. The customer success team is working really hard.
Manager
What do you like best about Xobin?
It is excellent for campus recruitment, and have excellent question pool.
HR
What do you like best about Xobin?
We are able to conduct all kinds of tests, including technical, aptitude, and programming tests, on a single platform. The staff is very helpful.
Delivery Executive
VALIDSIGN
Fullstack Developer
What do you like best about Xobin?
We now have a far better understanding of the candidate's potential for product development because of Xobin. It was simple to use and offered a huge selection of assessments.
What do you like best about Xobin?
They provide unlimited invitations, outstanding customer service, a variety of questions, and the platform is user-friendly.
What do you like best about Xobin?
They provide unlimited invitations, outstanding customer service, a variety of questions, and the platform is user-friendly.
HR Executive
CloudKaptan
Business Development & Growth
Jigserv
