WIF3008 Pop Quiz Lecture 10: Fault Tolerance in Real-Time System

What is the primary goal of fault tolerance in real-time systems?

• To minimize the cost of the system

• To ensure the system operates correctly despite faults

• To improve the speed of the system

• To eliminate all hardware failures

Which of the following is an example of a fault in a real-time system?

• A power outage

• A bug in the software code

• Delayed network transmission

• All of the above

What is the term used to describe the state where a system deviates from its expected behavior due to a fault?

• Failure

• Error

• Redundancy

• Recovery

What technique is used to periodically save the system’s state to recover from faults?

• Graceful degradation

• Redundancy

• Error detection

• Checkpointing

What is an example of hardware redundancy in fault-tolerant systems?

• Multiple backup sensors in an autonomous vehicle

• Parallel execution of multiple algorithms

• Regular software updates

• Use of secure communication protocols

Which fault tolerance technique reduces system functionality while maintaining core operations during failures?

• Active replication

• Rollback recovery

• Graceful degradation

• Failover

In real-time systems, what is a watchdog timer primarily used for?

• Monitoring task execution and detecting failures

• Enhancing task scheduling efficiency

• Reducing system power consumption

• Synchronizing hardware components

What is the main purpose of error correction mechanisms in real-time systems?

• To detect faults before they occur

• To identify and correct faults during system operation

• To recover the system to its last saved state

• To enhance computational speed