EXAM CODE : 201-450 UPDATION DATE : 2023-03-28 TOTAL QUESTIONS : 161 UPDATES : UPTO 3 MONTHS GUARANTEE : 100% PASSING GUARANTEE
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Which of the following is a side effect of extensive usage of swap space?
A. The root filesystem may become full because swap space is always located on the system root partition.
B. The overall system performance may degrade because of heavy hard disk use and memory reorganization.
C. Since processes always exist completely in either RAM or swap, regular RAM may become unused if the kernel does not move processes back from the swap space to memory.
D. The memory may become fragmented and slow down the access to memory pages. However, this can be kept to a minimum by the regular use of memfrag -d.
E. Applications need to restart because their virtual memory addresses change to reflect memory relocation to the swap address area.
ANSWER : B
In the below example output, which columns detail the percent of the time the CPU spent running non-kernel code and the percent of the time the CPU spent running kernel code? (Choose TWO correct answers.)
# vmstat 1 100 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0
A. id
B. us
C. wa
D. sy
ANSWER : B,D
When planning a web server which of the following choices will impact system sizing? (Choose THREE correct answers.)
A. How many concurrent users are expected.
B. Which hardware vendor has better Linux support.
C. What type of content will be served.
D. What scripting languages will the web server support.
E. Will the OS install be CD, DVD or network based.
ANSWER : A,C,D
Which commands below are useful to collect data about remote filesystem connections? (Choose TWO correct answers.)
A. pidstat
B. nfsiostat
C. sadf
D. cifsiostat
ANSWER : B,D
In the following output, what percentage of time was the CPU waiting for pending I/O?
# vmstat 1 100 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0 0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0
A. 0
B. 100
C. 35.9
D. 57.7
E. 36.6
ANSWER : A
