101-500 Practice Test

Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?

A.

cat < myapp | cat > file1.log

B.

myapp 0>&1 | cat > file1.log

C.

myapp | cat > file1.log

D.

myapp | tee file1.log

E.

tee myapp file1.log

Which of the following shell redirections will write standard output and standard error output to a file named filename?

A.

2>&1 >filename

B.

>filename 2>&1

C.

1>&2>filename

D.

>>filename

E.

1&2>filename

Which of the following sequences in the vi editor saves the opened document and exits the editor? (Choose TWO correct answers.)

A.

esc ZZ

B.

ctrl :w!

C.

esc zz

D.

esc :wq!

E.

ctrl XX

Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

A.

uptime

B.

up

C.

top

D.

uname -u

E.

time –up

Which of the following commands will reduce all consecutive spaces down to a single space?

A.

tr '\s' ' ' < a.txt > b.txt

B.

tr -c ' ' < a.txt > b.txt

C.

tr -d ' ' < a.txt > b.txt

D.

tr -r ' ' '\n' < a.txt > b.txt

E.

tr -s ' ' < a.txt > b.txt