Q. Which of these is the correct method for appending “foo” in /tmp/bar file?
✅ Correct Answer: (B)
echo foo >> /tmp/bar
Operating System Architecture MCQs | Page - 63
Dear candidates you will find MCQ questions of Operating System Architecture here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. Syntax to suppress the display of command error to monitor?
✅ Correct Answer: (D)
command 2> /dev/null
Q. The following commands gives the output like this #cat file1 file2
#cat: file1: No such file or directory hello
If we execute the command “cat file1 file2 1>2 2>&1” the output would be
#cat: file1: No such file or directory hello
If we execute the command “cat file1 file2 1>2 2>&1” the output would be
✅ Correct Answer: (B)
no output is displayed
Q. cat < file1 >> file2 | file3
✅ Correct Answer: (D)
syntax error
Q. Executing cat /etc/password > /dev/sda as superuser will
✅ Correct Answer: (B)
write data to the physical device sda
Q. rom where would the read statement read if the following statements were executed? exec < file1 exec < file2 exec < file3 read line
✅ Correct Answer: (B)
it would not read any files
Q. In python, the list L contains the following elements : ['A', 1,'1','George']. Which of the following ways of slicing would assign only the first two elements to the variable X ?
✅ Correct Answer: (C)
x=[l[0:2]
Q. How do you find out what's your shell ?
✅ Correct Answer: (A)
echo $shell
Q. What's the command to find out users on the system ?
✅ Correct Answer: (A)
who
Q. Which command is used for changing init's run level once the system is up ?
✅ Correct Answer: (B)
telinit
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