ITE 221 Chapter 11 Study Guide – Flashcards
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The ____ plays a dual role as a high-level manager and a tireless low-level worker.
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operating system
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Operating systems are organized internally into layers.
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True
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Memory allocation is less complex when the OS supports multitasking.
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False
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Resource allocation in a single-tasking OS involves only two running programs an application and the OS.
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True
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Because page size is fixed, memory references can easily be converted to the corresponding page number and offset in the page.
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True
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Noncontiguous memory allocation is more flexible than contiguous memory allocation, but flexibility comes at a price.
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True
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Virtual memory management responsibility is split between the CPU and the OS.
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True
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Intel Core CPUs implement virtual memory management tables in ____.
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hardware
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Multitasking operating systems are not the norm for general-purpose computers
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False
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____ uses memory address operands that refer to actual physical memory locations.
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Absolute addressing
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A ____ is an OS that enables dividing a single physical computer or cluster into multiple virtual machines.
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hypervisor
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Data values and instructions generally occupy multiple bytes of storage.
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True
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Contiguous program loading, coupled with fixed-size memory partitions, usually results in efficient use of memory space.
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False
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A blocked thread is waiting for an event to occur, such as allocation of a requested resource or correction of an error condition.
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True
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The only portion of a process that must be in memory at any point during execution is the next instruction to be fetched.
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False
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A ____ can execute instructions to process a single transaction, retrieve and store data from an I/O device, or retrieve and analyze one set of process variables.
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thread cycle
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A page table entry includes the page s physical memory address if it s loaded into memory.
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True
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____ occurs when memory partitions allocated to a single process or purpose are scattered throughout physical memory.
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Fragmentation
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The process of determining the physical memory address that corresponds to a memory reference is called ____.
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address mapping
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In ____ memory allocation, each process partition has its own offset value.
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noncontiguous
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Through the ____ layer, a user or system administrator can run application and OS utility programs and manage system resources, such as files, folders, and I/O devices.
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command
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Multitasking operating systems are not the norm for general-purpose computers.
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False
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A CPU s or computer s ____ is the highest numbered storage byte that can be represented.
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addressable memory
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The OS maintains a ____ and updates it each time a partition is allocated or freed.
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memory partition table
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____ store information about page locations, allocated page frames, and secondary storage space
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Page tables
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The ____ is the OS portion that manages resources and interacts directly with computer hardware.
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Kernel
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The ____ is the user interface to the OS.
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shell
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A secondary storage region, called the ____, is reserved for the task of storing pages not held in memory.
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swap space
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A thread s current priority level is called its local priority.
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False
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A hypervisor can make the sum of physical resources allocated to all virtual machines appear greater than the underlying physical resources.
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True
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When considered as a byte sequence, the rightmost byte is called the most significant byte.
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False
