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Construct a crontab to perform tasks given below at the frequencies specified. Note that you do NOT need to write the actual scripts!
a) Run a backup script named local-backup from the /usr/local/adm directory every weekday at 11:30pm.
b) Execute a cleanup script named weekly-cleanly from the same directory above, every Friday at 4:30am.
c) Every night, produce a list of files that are world-writable.
d) Execute a reporting program, named twice-monthly from the /usr/local/bin directory on the 15th and 31st.
e) Execute a performance report script named perf23 every hour at 15 and 45 minutes after the hour on weekdays between the hours of 6:00am and 6:00pm. The script is located in root's home directory.
Discuss how do you envision ways program verification and performance tuning will be accomplished in future and will it still be a work of art?
A procedure is said to be I/O bound if it needs a lot of I/O operations, whereas a procedure that consists of mostly computations within the CPU/memory system is said to be compute bound.
ATM networks use a token bucket program to regulate traffic. A new token is put into the bucket every one usec so ATM cells can be sent during this period.
Forking the child process
Assume that a computer using a set associative cache has 2^16 words of main memory and a cache of thirty-two blocks, where each cache block contains eight words.
Explain 3-approaches to organizing programming teams. For what types of assignments or development activities is each approach best suited?
The ring algorithm supposes that the links are unidirectional and that every procedure sends its message to the neighbor on the right. The main data structure used through the algorithm is the active list,
Explain how the computer system accommodating the 2G memory requirement by only using 1G physical memory. Assume that the page size is 4M, and so is the page frame size and Explain what logic memory addresses are, what physical memory addresses are..
Determine the difference between message confidentiality and message integrity? Can you have confidentiality without integrity?
Create a program that shows how various exceptions are caught with catch Exception
Give three technical merits of UNIX b) Differentiate between "clustered systems" and "real-time systems". c) Describe the purpose of using "trust relationship"
Describe the role of each of the following in determining the speed of a personal computer, RAM, Clock speed, Data on hard disk
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