Hi all
today i gone through worst interview of my life that for hour questions were so basic but i never though about them now i am figuring out answers my self but i would appreciate if you ppl help me ... i am listing some of the questions i remember ..
1 )
now which shell will execute this echo statement ?
2 ) how to call one shell script from other script without creating new process ? interviewer told me i want to use $aaa from a.sh script to b.sh without exporting it ?
ANSWER
3 ) how to know current shell you are working in ?
echo $SHELL ...but he was looking for something else ..i dont know what exactly.
sorry for not searching the forum before posting questions here is the thread : https://www.unix.com/unix-dummies-que...ent-shell.html
4 ) how to display all ENV varaibles without using env command ? from shell and then from perl ( perl i will figure out ..)
i knew this one i was not sure ..
5 ) in perl say i have statement
will it assign STDOUT / STDERR / BOTH ? if not BOTH then how to get other one ?
ANSWER : it read both
6 ) in perl what can be maximum length of variable ? like my $a = "aaa...." how far can i go ?
@ corona688 - you are right ... looks like there is no limit
above script worked ...without any probs ..3 million is more than enough
7 ) in perl how can i execute a module ? and how can i use variable used in modul a in module b ?
ANSWER :
suppose i have module "A" and variable "aaa" inside it i want to access "$aaa" in B module then i would use something like
$bbb = $A::aaa ;
read it on perlmod man page ....
i can remember this much only right now ... if i find out i will put answers in this thread only ...
@ MOD : this is not homework. if this is against rules of forum you can delete this thread.
Last edited by zedex; 02-02-2009 at 02:31 PM..
Reason: answer for q 5
Hi all
today i gone through worst interview of my life that for hour questions were so basic but i never though about them now i am figuring out answers my self but i would appreciate if you ppl help me ... i am listing some of the questions i remember ..
1 )
now which shell will execute this echo statement ?
Korn shell - ksh
The rest of your questions I will leave to people with better knowledge...sounds like it was a tough interview.
now which shell will execute this echo statement ?
Just work it out logically. What does bash do when you run 'bash filename'? How will it treat lines beginning with #?
Quote:
2 ) how to call one shell script from other script without creating new process ? interviewer told me i want to use $aaa from a.sh script to b.sh without exporting it ?
'source filename'.
Quote:
6 ) in perl what can be maximum length of variable ? like my $a = "aaa...." how far can i go ?
2 ) how to call one shell script from other script without creating new process ? interviewer told me i want to use $aaa from a.sh script to b.sh without exporting it ?
Dont understand.. Is he thinking of exec ?
Quote:
4 ) how to display all ENV varaibles without using env command ? from shell and then from perl ( perl i will figure out ..)
1. bash
2. use the dot command to invoke the script
3. ps -f
4. In ksh I would use "typeset -x". Also there is "printenv".
I'm not real good at perl, but I think....
5. stdout; 2>&1
6 and 7: I'll pass
When you say:
bash file
bash will open the file and start reading commands. No kernel exec happens and to any shell "#! /usr/bin/ksh" is just a comment.
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