Which command can be used to display a text file's contents in reverse order and why might a user want to do this?
What will be an ideal response?
You can use the tac command ("cat" spelled backward) to display a text file's contents in reverse order. The main purpose of this command is to display log files, which are text files in the /var/log directory containing information gathered about the system. Displaying these files in reverse order means the most recent events are shown first, which is more helpful when troubleshooting.
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Suppose that a static hash file initially has 600 buckets in the primary area and that records are inserted that create an overflow area of 600 buckets. If we reorganize the hash file, we can assume that the overflow is eliminated. If the cost of reorganizing the file is the cost of the bucket transfers (reading and writing al of the buckets) and the only periodic file operation is the fetch operation, then how many times would we have to perform a fetch (successfully) to make the reorganization cost-effective? That is, the reorganization cost and subsequent search cost are less than the search cost before reorganization. Assume s=16, rd=8.3 ms, btt=1 ms.
What will be an ideal response?
You driving to a meeting at 60 miles per hour. At 50 miles from your destination you realize you will be 5 minutes late unless you speed up. To arrive on time, how many miles per hour must you increase your speed?You driving to a meeting at 60 miles per hour. At 50 miles from your destination you realize you will be 5 minutes late unless you speed up. To arrive on time, how many miles per hour
must you increase your speed? Solve the problem using the approach used in the examples above. Then use an alternative approach to check the solution. No need to use the IPO worksheet
Federal rules and laws are changed
A) To keep up with new technology B) To help govern regulations C) To keep up with political policies D) To help explain the differences in physical and cyberlaws
Elements are deleted from the end of the queue called the ____.
A. rear B. front C. tail D. middle