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41 Cards in this Set
- Front
- Back
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What operating system part is unique to each operating system.
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Interface
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Linux, Netware, Unix, and Windows are commonly used for what operating system platform.
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Network Platform
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A combination of batch and interactive make up a.
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Hybrid System
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What Introduced the need for control cards.
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Job Scheduling
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The control unit was introduced during second generation why.
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Reduce descretpy and speed between the IO and CPU
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What is firmware.
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Program permanently keep in rom.
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What sparked the demand for network capabilities in the mid 1990.
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The internet
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What is the kernel.
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The core part of the OS
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In fixed partition what is the first step in loading a job.
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Determine the jobs requested memory
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HHow does best fit memory allocation work?
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Looks at the job scheduler and all partitions that are open to use the best fit so we have the least amount of internal fragmentation.
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How does the memory manager deallocated in a fixed partition scheme.
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resets the memory block to free.
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What is compaction.
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Reclaiming fragmented segments.
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What is a problem associated with compaction.
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overhead, takes up alot time
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What are the three options to perform compaction.
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Time, Percentage, jobs are waiting.
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What are the biggest advantage for storing programs in non contigues memory locations
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Main Memory is more efficient
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What is the problem with setting page sizes to small.
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Very long page map tables
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Under page defaults what most be done with any pages that have been swapped if its been modified?
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It has to be rewritten to the disk
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What is thrashing?
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Constite swapping
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How does the first in first out policy work for page swapping
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First in first out.
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How does the Least Recently Used policy work
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Swaps the one with least amount of activity
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What is ment by locality of reference?
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No reason to load the entire program all the time.
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What is the makeup of a address for segmented memory management?
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Segment number and displacement
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What does the system use as a main memory between cpu?
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Cache
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What is a thread?
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A lightweight process or a portion of a process that can be run independitly.
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Trying to balances cpu bound process and IO bound process fall under which scheduler?
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Job Scheduler
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5 states of a scheduler.
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Hold Ready Running Waiting Finish
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When a job is accepted by the system which happens first?
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Goes into hold than into a que
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What is the purpose of accounting in a PCB?
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Billing and perfomance measurments or statistics
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What is considered a schedule wait in a multi-program enviroment?
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A IO Request
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A first come first serve algorithium uses what kind of que?
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First in First out que
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What is aging?
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When a process sits in a waiting que it raises it prioritys
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What is the advantage and disadvantage of using dynamic resource sharing in a interative system?
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Uses resources better but can lead to deadlocks
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Deadlocks become critical for what kind of systems?
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Real-time
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A race can happen in a database if you fail to do what?
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Lock the record
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Control the flow of messages threwout the network?
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Protocols
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What is ment by mualtile exclusion?
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Only one process is giving a dedicated resource
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No premeption means?
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Cannot be interupted dedicated for aslong as its need
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What is a circular wait?
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Waiting for a job that will never finish.
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what is another name for multiprocessing?
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Parrell processing
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What is a critical region of a process?
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Has to be processed as a unit
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Threads are compossed of what? Process Regisers,
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Process Regisers, Program Counters, Stats and Stacks share data area, code, and original resources allocated.
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