UNIT 3 Level Quiz

Which of the following best describes a distributed computing system?

• A single powerful computer handling all tasks
• Multiple independent computers working together as one system
• Only multiprocessor systems with shared memory
• A single-threaded program running faster

In parallel multiprocessors, processors usually share:

• Distributed file systems
• Global memory space
• Network interfaces only
• Independent I/O devices

A multicomputer system differs from a multiprocessor system because:

• It has faster processors
• Processors communicate via a network instead of shared memory
• It does not support concurrency
• It is always cheaper

Which of the following is an example of a concurrent program?

• A single-threaded calculator
• Multiple processes executing independently but interacting
• A compiler running sequentially
• A database storing static data

Message passing systems are mainly used in:

• Shared-memory multiprocessors
• Distributed memory systems
• Uniprocessor systems
• Cache-only systems

Which is a limitation of message passing compared to shared memory?

• Higher communication overhead
• Lack of process isolation
• No synchronization needed
• Faster execution always

In shared memory systems, processes communicate by:

• Sending signals over a network
• Exchanging messages
• Reading and writing common variables
• Using external storage

Which execution model assumes lock-step progress of processes?

• Asynchronous execution
• Real-time execution
• Synchronous execution
• Multi-threaded execution

In asynchronous execution, processes:

• Must wait for global synchronization
• Execute independently at arbitrary speeds
• Use a single system clock
• Cannot communicate

One challenge in distributed systems is:

• Centralized memory access
• Synchronization of processes without a global clock
• Unlimited bandwidth availability
• Perfect fault tolerance