expr is a shell command that evaluates arithmetic expression, given as argument to it. The multiplication symbol *, will be treated as metacharacter by shell
Q. No. :
19
Question :
What is the command to connecto to remote terminals?
A :
ping
B :
telnet
C :
ftp
D :
mime
Answer: B
Q. No. :
20
Question :
if file has 000 permission then
A :
root can only read the file
B :
any user can read the file
C :
root can read and write the file
D :
root can read write as well as execute the file
Answer: C
Q. No. :
21
Question :
Which of the following file names cannot be displayed if ls * is run?
A :
-Xy
B :
#x
C :
.x
D :
hidden
Answer: C
Q. No. :
22
Question :
Which command would you use to change the priority of a running process?
A :
nice
B :
ps
C :
top
D :
ls
Answer: A
Q. No. :
23
Question :
Which command is used to display the output of a command as well as store it in a file ?