Question 1

Nodes in a NORMA multiprocessor communicate through __________.

Accepted Answer

A)  explicit messages and, in some systems, shared virtual memory (SVM) 
B)  explicit messages and, in some systems, shared physical memory 
C)  SVM and, in some systems, shared physical memory 
D)  explicit messages, SVM and, in some systems, shared physical memory 
A)  explicit messages and, in some systems, shared virtual memory (SVM) 
B)  explicit messages and, in some systems, shared physical memory 
C)  SVM and, in some systems, shared physical memory 
D)  explicit messages, SVM and, in some systems, shared physical memory

Question 2

In which environments does a symmetric load balancing policy perform well?

Accepted Answer

A)  The system is always overloaded. 
B)  The system is always underloaded. 
C)  There are some periods when the system is underloaded, and some when the system is overloaded. 
D)  all of the above 
A)  The system is always overloaded. 
B)  The system is always underloaded. 
C)  There are some periods when the system is underloaded, and some when the system is overloaded. 
D)  all of the above

Question 3

__________ are not migrated with a process as part of its process state.

Accepted Answer

A)  Machine registers contents 
B)  Children processes 
C)  The state of the process's open files 
D)  Working set memory pages 
A)  Machine registers contents 
B)  Children processes 
C)  The state of the process's open files 
D)  Working set memory pages

Question 4

A __________ is an example of a SIMD processor?

Accepted Answer

A)  Vector processor 
B)  Dual-processor Intel Pentium system 
C)  Uniprocessor with a pipeline, containing many stages 
D)  all of the above 
A)  Vector processor 
B)  Dual-processor Intel Pentium system 
C)  Uniprocessor with a pipeline, containing many stages 
D)  all of the above

Question 5

How might page migration and page replication actually reduce system performance?

Accepted Answer

A)  Page replication requires a more complex coherency protocol because the same page can exist at separate nodes. 
B)  Replicating or migrating a page is more costly than remotely referencing a page a small number of times. If pages that are replicated or migrated are not referenced again at their new nodes, then these strategies slow average memory access time. 
C)  The information that must be maintained to make good migration and replication decisions can consume substantial memory overhead. 
D)  all of the above 
A)  Page replication requires a more complex coherency protocol because the same page can exist at separate nodes. 
B)  Replicating or migrating a page is more costly than remotely referencing a page a small number of times. If pages that are replicated or migrated are not referenced again at their new nodes, then these strategies slow average memory access time. 
C)  The information that must be maintained to make good migration and replication decisions can consume substantial memory overhead. 
D)  all of the above

Question 6

Which of the following statements does not describe a benefit of the COMA design?

Accepted Answer

A)  COMA systems require a less complicated memory coherency protocol than NUMA systems. 
B)  False sharing is reduced compared to NUMA systems that use page migration. 
C)  The number of cache misses serviced remotely is reduced compared to NUMA systems. 
D)  Operating system designers do not have to implement page migration and replication strategies. 
A)  COMA systems require a less complicated memory coherency protocol than NUMA systems. 
B)  False sharing is reduced compared to NUMA systems that use page migration. 
C)  The number of cache misses serviced remotely is reduced compared to NUMA systems. 
D)  Operating system designers do not have to implement page migration and replication strategies.

Question 7

How is bus snooping implemented to ensure cache coherence?

Accepted Answer

A)  The system maintains a centralized directory that records the items in each processor's cache. On a cache write, the writing processor "snoops" this list to determine whether the item is in other processors' caches, and if so, tells these other processors to remove the item. 
B)  The system only allows one processor at a time to cache each data item; when a processor tries to cache a data item, it "snoops" other processors' caches over the bus to determine whether it is allowed to cache the data. 
C)  Each processor "snoops" the processor-memory bus to determine whether another processor has sent a message about an update to a data item stored in its cache. 
D)  Each processor "snoops" the bus to determine whether a requested write from another processor is for a data item in the processor's cache. If the data resides in the processor's cache, the processor removes the data item from its cache. 
A)  The system maintains a centralized directory that records the items in each processor's cache. On a cache write, the writing processor "snoops" this list to determine whether the item is in other processors' caches, and if so, tells these other processors to remove the item. 
B)  The system only allows one processor at a time to cache each data item; when a processor tries to cache a data item, it "snoops" other processors' caches over the bus to determine whether it is allowed to cache the data. 
C)  Each processor "snoops" the processor-memory bus to determine whether another processor has sent a message about an update to a data item stored in its cache. 
D)  Each processor "snoops" the bus to determine whether a requested write from another processor is for a data item in the processor's cache. If the data resides in the processor's cache, the processor removes the data item from its cache.

Question 8

__________ process scheduling attempts to exploit parallelism inherent in groups of related processes.

Accepted Answer

A)  Job-blind scheduling 
B)  Space-partitioning scheduling 
C)  Timesharing scheduling 
D)  RRprocess scheduling 
A)  Job-blind scheduling 
B)  Space-partitioning scheduling 
C)  Timesharing scheduling 
D)  RRprocess scheduling

Question 9

__________ is not a desirable characteristic of a successful migration strategy.

Accepted Answer

A)  Transparency 
B)  Scalability 
C)  Residual dependency 
D)  Fault tolerance 
A)  Transparency 
B)  Scalability 
C)  Residual dependency 
D)  Fault tolerance

Nodes in a NORMA multiprocessor communicate through __________.

In which environments does a symmetric load balancing policy perform well?

__________ are not migrated with a process as part of its process state.

A __________ is an example of a SIMD processor?

How might page migration and page replication actually reduce system performance?

Which of the following statements does not describe a benefit of the COMA design?

How is bus snooping implemented to ensure cache coherence?

__________ process scheduling attempts to exploit parallelism inherent in groups of related processes.

__________ is not a desirable characteristic of a successful migration strategy.

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

Understanding Computer Systems and Programming Concepts

Understanding Processes and Threads in Operating Systems

Exploring Semaphores and Multithreading in Operating Systems

Exploring Thread Synchronization and Mutual Exclusion in Java

Concurrency and Deadlock in Database Systems: Exploring Monitor Implementation and Thread Synchronization in Java

Operating System Scheduling and Deadlock Prevention: a Comprehensive Guide

Understanding Processor Scheduling and Memory Management in Operating Systems

Memory Management in Operating Systems: Segmentation, Paging, and Strategies for Efficiency

Memory Management and Address Translation in Operating Systems

Memory Management and Page Replacement Strategies in Operating Systems

Disk Storage and Raid Technology

Understanding File Systems and Database Systems: a Comprehensive Overview

Exploring Performance Evaluation and Benchmarking in Computer Systems

Understanding the Layers of the TCP/IP Protocol Stack

Understanding Distributed Systems and Operating Systems

Exploring Distributed File Systems and Grid Computing With NFS, AFS, Coda, and JXTA

Security Threats and Solutions in Cryptography and Access Control

Exploring the Linux Operating Systems Features and Functionality

In-Depth Analysis of Windows XP

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Exam 15: Understanding Multiprocessor Organizations and System Performance

Nodes in a NORMA multiprocessor communicate through __________.

In which environments does a symmetric load balancing policy perform well?

__________ are not migrated with a process as part of its process state.

A __________ is an example of a SIMD processor?

How might page migration and page replication actually reduce system performance?

Which of the following statements does not describe a benefit of the COMA design?

How is bus snooping implemented to ensure cache coherence?

__________ process scheduling attempts to exploit parallelism inherent in groups of related processes.

__________ is not a desirable characteristic of a successful migration strategy.

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

Understanding Computer Systems and Programming Concepts

Understanding Processes and Threads in Operating Systems

Exploring Semaphores and Multithreading in Operating Systems

Exploring Thread Synchronization and Mutual Exclusion in Java

Concurrency and Deadlock in Database Systems: Exploring Monitor Implementation and Thread Synchronization in Java

Operating System Scheduling and Deadlock Prevention: a Comprehensive Guide

Understanding Processor Scheduling and Memory Management in Operating Systems

Memory Management in Operating Systems: Segmentation, Paging, and Strategies for Efficiency

Memory Management and Address Translation in Operating Systems

Memory Management and Page Replacement Strategies in Operating Systems

Disk Storage and Raid Technology

Understanding File Systems and Database Systems: a Comprehensive Overview

Exploring Performance Evaluation and Benchmarking in Computer Systems

Understanding the Layers of the TCP/IP Protocol Stack

Understanding Distributed Systems and Operating Systems

Exploring Distributed File Systems and Grid Computing With NFS, AFS, Coda, and JXTA

Security Threats and Solutions in Cryptography and Access Control

Exploring the Linux Operating Systems Features and Functionality

In-Depth Analysis of Windows XP

Filters