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UNIX -3530 Midterm Correct Answers Latest Version
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UNIX -3530 Midterm Correct AnswersLatest Version
What symbol can refer that you are located in the Home directory in Unix?
ANS✔✔ ~ (tilde)
Who wrote the C compiler for the Unix fifth version? ANS✔✔ Dennis Richie
Which syntax is used to redirect the outputs to a file instead of printing to
the screen? ANS✔✔ <
Which is the correct command line syntax to count all the words in all of your
text documents, sort the text documents, and then display to screen the 2
lowest wc numbers to the screen? ANS✔✔ wc *.txt | sort | head -2
What are the three parts of the Unix architecture? ANS✔✔ Kernel, Shell, User
command and apps
What does the segmentation table contain that a CPU generates? ANS✔✔
Base Address/Limit
There is a simple relationship between logical addresses and physical
addresses in segmentation (T/F) ANS✔✔ False
What is the job of the memory management unit? ANS✔✔ Translate virtual
addresses in to physical addresses
, What are the disadvantages of the Fixed Partition Scheme? ANS✔✔ - If the
job size is greater than the size of the memory partition then the execution
of the job is not performed.
- Systems need to be shutdown to re-configure the sizes of partitions
- The remaining space in each partition is unused
Which memory management management allocation scheme is where the
entire program or job is first loaded into memory contagiously as much as
possible? ANS✔✔ Single-User Contiguous Scheme
What are the two aspects on which the performance depends? ANS✔✔ - The
amount of memory available
- Optimal utilization of memory while processing of jobs
Which memory management allocation scheme is where the main memory is
divided into blocks of memory known as partitions. Each job is allocated a
partition. ANS✔✔ Fixed Partition
Single-User Contiguous Scheme : advantages ANS✔✔ - The jobs are allocated
sequentially. Hence the requirement of operating system's work is less.
-The Operating system just needs to check if the incoming job fits into the
available memory space else reject the job and proceed to the next incoming
job.
Single-User Contiguous Scheme : Disadvantages ANS✔✔ - Only one job or
program is loaded in to memory at any point of time.
- Memory sharing is not possible among jobs
- Even though there is a space to accommodate the waiting jobs, it is not
possible accommodate more than one job.
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