TCS PA Unix MCQs
1.To copy two files in a new files ?
cat file1 file 2 > file 3
2.To sort the records from large to small number and print the largest number ?
Option with Desc limit 1
3.Grep tata.*services$//multiple answer question
which has tata --service –may contain anything like consultancy , conference etc..
4.To remove a folder which have files
rm –rf
5.Grep –v java// multiple answer question
options which doesn’t contain the java word in the line is the answer
6.S=0 {s=s+$2}
Avg of second column
Sum of second column
7.Unix command to remove duplicates in line ?
1.sort –u
2.sort unique
3.uniq
4.unique
8.What is output of below commands.. ?
grep –o cat animal.txtgrep ‘cat’ animal.txt
1.cat cat
9.File and directory permission access will be done by which command ... ?
chmod
10.On update cascade ensures what .. ?
1.Data integrity
11.Delete lines from ‘this’ file .. ?
Sed/’this’/d file
12.String ‘llp’ file case insensitive.. ?
1.Grep –i‘llp’ file.txt
13.Compress file in unix.. ?
Zip
gzip
14.Pattern match at beginning of file ?
^pat
15.Length of longest file .. ?
Wc –L <filename>
16.Sort file1| uniq–u
Sort the file name file 1 and diplaysdistinct lines
17.Query to delete primary key constraints .. ?
Drop
18.To print first line from file1.txt use,
awk 'NR==1' file1.txt
head -1 file1.txt
sed -n '1p' file1.txt
19.What is output of below command
awk'BEGIN{s=0 while(s<55){print s; ++s}}'
syntax error.
20.To count only words from which command is used ?
1.wc filename
2.wc -w filename
3.wc -word filename
21.S=S+$2.. ?
sum of second column
22._____displays all environment variables
env
23.in order to determinvalue of a variable use the command?
set
24.What are three main components of the Unix Architecture
kernel,shell,utilities
25.When a process finished its execution and exit status not received by the parent, the process state becomes...
Zombie
