- Language Internals – Garbage collection, exception hierarchy, multithreading basics, and compilation vs. runtime mechanics.
Advanced concepts (less common):
- Thread synchronization primitives, thread pools, and concurrency utilities.
- Enterprise design patterns including Factory, Singleton, Observer, and Dependency Injection.
- Framework internals such as Spring Bean life cycles and annotation processing.
Example questions or scenarios:
- Demonstrate how to override
hashCode() and equals() correctly in custom Java classes.
- Explain the execution difference between checked and unchecked exceptions, providing code examples.
- Write a function to identify duplicate characters in a string while maintaining runtime efficiency.
Database Systems & Query Optimization
Enterprise applications depend heavily on structured data storage and reliable transaction processing. Candidates are frequently tested on relational database management systems (RDBMS), database design, and writing performant SQL queries.
Be ready to go over:
- SQL Querying – Writing multi-table
JOIN statements, GROUP BY aggregations, subqueries, and nested filtering.
- Relational Concepts – Primary/Foreign key constraints, normalization levels (1NF, 2NF, 3NF), and transactional integrity (ACID properties).
- Data Modeling – Choosing appropriate data types, structuring database schemas, and understanding SQL vs. NoSQL usage criteria.
Advanced concepts (less common):
- Database index mechanics (B-Trees) and understanding query execution plan analysis.
- Stored procedures, triggers, database views, and transaction isolation levels.
- Distributed caching integration strategies between databases and application tiers.
Example questions or scenarios:
- Write a query to select the highest-paid employee within each department.
- How do left outer joins differ from inner joins, and how do null values affect query output?
- Explain how indexing improves read performance and its impact on write operations.
Networking, Systems & Infrastructure Concepts
Because DXC Technology frequently manages infrastructure, hybrid cloud systems, and platform migrations, engineers are expected to understand basic system networking, operating systems, and deployment configurations.
Be ready to go over:
- Networking Fundamentals – Protocols including TCP/IP, HTTP/HTTPS, DNS, DHCP, and basic network security principles (VPN, MFA).
- Operating Systems – Core Linux file management, environment configuration, permissions, and basic Bash scripting.
- Web Architectures – Understanding client-server architecture, standard ports, web server roles, and request-response cycles.
Advanced concepts (less common):
- Network routing protocols such as OSPF and BGP for enterprise cloud configurations.
- Enterprise user directory management including LDAP and Active Directory setups.
- Basic cloud service models (IaaS, PaaS, SaaS) within AWS or Microsoft Azure.
Example questions or scenarios:
- Explain step-by-step what happens at the network layer when a user types a secure website URL into a browser.
- What commands would you use in Linux to inspect running processes and monitor open network ports?
- Describe the difference between symmetric and asymmetric encryption in modern software security.
Project Architecture & Behavioral Competencies
Interviewers place significant focus on your past engineering projects and behavioral handling of workplace situations. You must effectively explain how you build applications, collaborate in teams, and manage project expectations.
Be ready to go over:
- Resume Project Architecture – Articulating your specific contributions, technological choices, database designs, and implementation challenges.
- Software Lifecycle Knowledge – Explaining standard software delivery models, continuous integration tools, and code review practices.
- Workplace Collaboration – Handling shifting requirements, resolving technical disputes, and communicating project progress.
Advanced concepts (less common):
- Managing client expectations during technical outages or delayed delivery schedules.
- Structuring task delegation and mentorship when acting as a technical senior or team lead.
- Architecting applications to meet regulatory compliance or security auditing requirements.
Example questions or scenarios:
- Describe a difficult bug you encountered in a recent project and the step-by-step methodology you used to diagnose and fix it.
- How do you prioritize urgent production fixes against planned sprint development deliverables?
- Describe a time when team members disagreed on a key system architecture decision. How did you reach consensus?