AP CSP Fault Tolerance

What is fault tolerance?

• The ability of a system to recover quickly from the failure of some of its components.

• The ability of a system to function properly only when all of its components are working perfectly.

• The ability of a system to continue functioning properly in the event of the failure of some of its components.

• The ability of a system to function properly even when there is no failure of its components.

Why is fault tolerance important in computer systems?

• To increase the likelihood of system failures

• To decrease system performance

• To save costs on system maintenance

• To ensure system functionality in the presence of failures.

What is redundancy in fault tolerance?

• Having multiple backup plans

• Duplication of critical components or systems

• Using outdated technology

• Ignoring potential failures

What are the different types of redundancy?

• power redundancy

• network redundancy

• hardware redundancy, software redundancy, and data redundancy

• memory redundancy

Explain the concept of hardware redundancy.

• Hardware redundancy is the practice of having multiple software programs running simultaneously on a single hardware component.

• Hardware redundancy is the practice of having duplicate hardware components in a system to ensure continuous operation in case of a failure.

• Hardware redundancy refers to the process of regularly updating hardware components to ensure optimal performance.

• Hardware redundancy involves using virtualization technology to create multiple virtual instances of a hardware component.

What is software redundancy and how does it work?

• Software redundancy is the practice of duplicating critical components or systems in software to ensure reliability and fault tolerance.

• Software redundancy is the practice of reducing the number of critical components or systems in software to ensure reliability and fault tolerance.

• Software redundancy is the practice of using outdated components or systems in software to ensure reliability and fault tolerance.

• Software redundancy is the practice of removing critical components or systems in software to ensure reliability and fault tolerance.

What is data redundancy and why is it used in fault tolerance?

• Data redundancy is used in fault tolerance to save storage space.

• Data redundancy is used in fault tolerance to increase the risk of data loss.

• Data redundancy is used in fault tolerance to decrease data integrity.

• Data redundancy is used in fault tolerance to ensure data integrity and availability.

What is the difference between active redundancy and passive redundancy?

• Active redundancy involves active backup components, while passive redundancy involves inactive backup components.

• Active redundancy involves backup components that are always on, while passive redundancy involves backup components that are only activated when needed.

• Active redundancy and passive redundancy are the same thing.

• Active redundancy involves inactive backup components, while passive redundancy involves active backup components.

How does fault tolerance help in ensuring system reliability?

• Fault tolerance only applies to hardware failures, not software failures.

• Fault tolerance has no impact on system reliability.

• Fault tolerance increases the likelihood of system failures.

• Fault tolerance helps in ensuring system reliability by allowing the system to continue functioning even if there are failures or errors.

What are some examples of fault tolerance techniques used in real-world systems?

• redundancy, replication, checkpointing, error detection and correction

• load balancing

• retrying failed operations

• data backup