To excel in the North Point Technology interview, you should understand the specific technical domains where you will be evaluated. Depending on the specific track you are interviewing for, your evaluation will focus heavily on one or more of the following areas.
MES and Industrial Automation Testing
This area evaluates your ability to test and validate software systems that control physical manufacturing processes. Strong performance means demonstrating you understand how data flows from a physical sensor, through a PLC, up to SCADA, and finally into an MES database.
Be ready to go over:
- Database Validation – Writing complex SQL queries to verify that production transactions, material tracking, and genealogy data are accurately recorded.
- Interface Testing – Validating APIs and middleware interfaces that connect MES platforms with ERP systems (like SAP) and shop floor devices.
- Factory Acceptance Testing (FAT) / Site Acceptance Testing (SAT) – Creating and executing rigorous protocols to validate automated systems before and after deployment on the factory floor.
- Advanced concepts (less common) – High-availability failover testing for manufacturing servers, automated regression testing for PLC code, and disaster recovery validation for shop-floor systems.
Example questions or scenarios:
- "An MES system is failing to log material consumption data during high-throughput runs, but works fine during low-volume testing. How do you troubleshoot this?"
- "Walk me through how you would design a test case to validate that a recipe change on an MES screen correctly updates the registers on a Siemens PLC."
Systems Integration & Verification (Aerospace/Defense Track)
For roles focused on systems integration, particularly those requiring security clearances, the focus shifts to hardware-software co-design, rigorous verification standards, and end-to-end system testing.
Be ready to go over:
- Requirements Traceability – Mapping system requirements to specific test cases to ensure 100% verification coverage (using tools like DOORS).
- Test Automation Scripting – Writing robust test scripts (often in Python or C++) to automate the stimulation and monitoring of hardware interfaces.
- Network Protocol Analysis – Troubleshooting data flow across serial, Ethernet, or specialized military/industrial bus architectures.
- Advanced concepts (less common) – Simulating environmental conditions, evaluating system performance under degraded network states, and verifying cryptographic or secure data-handling interfaces.
Example questions or scenarios:
- "How do you verify system performance and timing requirements when dealing with real-time operating systems (RTOS)?"
- "Describe your approach to testing a software update on a live, mission-critical system with zero-downtime tolerance."
Program Validation & Robotics (AMR)
If your track focuses on robotics and automated material handling, you will be evaluated on your ability to test physical automation systems and manage complex, multi-vendor deployments.
Be ready to go over:
- Safety System Testing – Validating laser scanners, bumper switches, and emergency stop circuits to ensure compliance with industrial safety standards (such as ANSI/RIA R15.08).
- Fleet Management Integration – Verifying the communication between individual robot controllers and the centralized fleet allocation software.
- Scenario-Based Edge Case Testing – Designing physical test layouts to challenge obstacle avoidance, path replanning, and docking accuracy.
Example questions or scenarios:
- "How would you design a automated test environment to simulate 50 Autonomous Mobile Robots operating simultaneously on a shared wireless network?"
- "What metrics would you track to validate that a new AMR fleet deployment has successfully met its performance and safety benchmarks?"
