COE718 Final Exam 2026 (COE718) – 120 Questions & Answers – Real-Time Scheduling, HW/SW Co-Design & Fault Tolerance

This document contains approximately 120 fully solved COE718 Final 2026 exam questions and answers covering real-time systems, embedded system design, scheduling theory, and fault-tolerant computing. It includes detailed explanations of Worst-Case Execution Time (WCET), hard vs soft real-time processes, sporadic and aperiodic tasks, transient overload, and scheduling optimality conditions such as Rate Monotonic Scheduling (RMS) for D = T and Deadline Monotonic Priority Ordering for D T. The material thoroughly examines priority inversion (bounded vs unbounded), mutex locks, priority inheritance, Original Ceiling Priority Protocol (OCPP), Immediate Ceiling Priority Protocol (ICPP), and real-time embedded system performance analysis. It also covers hardware/software co-design processes including co-specification, partitioning, scheduling, allocation, mapping, system integration, and co-synthesis phases using UML, ESTEREL, and SDL. Design concepts such as control/data flow graphs, DAGs, profiling, longest delay path (LDpath), and architectural mapping are included. In addition, the document provides comprehensive coverage of reliability engineering and fault-tolerant computing (FTC), including MTTF, MTTR, MTBF, MTTD, minimal path sets, fault sources, failure classification (extent, value, duration), hardware redundancy (masking, dynamic redundancy, TMR), software fault tolerance techniques (recovery block, N-version programming, NSCP), backward vs forward recovery, checkpointing, journaling, and safe shutdown strategies. It also addresses system reliability probability modeling and embedded system design goals such as performance, cost, power consumption, and functionality. This study resource is particularly relevant for: Students enrolled in COE718 Real-Time Systems Computer Engineering majors Embedded Systems students Software Engineering students focusing on real-time design Candidates preparing for comprehensive final exams in real-time and fault-tolerant systems It is suitable for courses such as: Real-Time Operating Systems Embedded System Design Fault-Tolerant Computing Advanced Scheduling Algorithms Hardware/Software Co-Design System Reliability Engineering This document functions as a complete final exam preparation guide, reinforcing theoretical foundations and practical system-level concepts essential for real-time scheduling, embedded system architecture, and dependable computing design. Keywords: COE718 final exam 2026, worst case execution time WCET, hard vs soft real time scheduling, sporadic and aperiodic tasks, rate monotonic scheduling RMS, deadline monotonic priority ordering, priority inversion bounded unbounded, mutex priority inheritance, OCPP ICPP priority ceiling protocol, transient overload CPU, hardware software co design steps, co synthesis partitioning allocation mapping, control data flow graph DAG, longest delay path LDpath, system reliability probability MTTF MTTR MTBF MTTD, fault tolerant computing FTC, hardware redundancy TMR masking dynamic redundancy, software fault tolerance recovery block N version programming, forward backward recovery checkpointing journaling