IFT 250 FINAL QUESTIONS AND CORRECT ANSWERS
The xargs command - ANS✅✅Sometimes, the filenames used by commands
can be determined only at runtime. UNIX provides a real dark horse—the xargs
command—that can run any command but obtains the file list from standard
input.
Das, Sumitabha. Your UNIX/Linux: The Ultimate Guide, 3rd edition (Page 183).
McGraw-Hill Higher Education -A. Kindle Edition.
Wild cards - ANS✅✅The metacharacters used to match filenames belong to a
category called?
(Something like the joker that can match any card).
The ________ interacts with the hardware and the _________ interacts with the
user - ANS✅✅operating system, Shell
A program is synonymous with a process. True or false? - ANS✅✅False
Every character has a number associated with it. What is it called? -
ANS✅✅the ASCII value
,If you see a prompt like mailhost login:, what do you think mailhost represents? -
ANS✅✅The machine name
If the system echoes Login incorrect, does it mean that your user-id is incorrect? -
ANS✅✅Not necessarily, the password could be incorrect
Name the command you used in this chapter to display filenames. - ANS✅✅ls
Name the command you used in this chapter to display processes - ANS✅✅ps
Name the command you used in this chapter to display users. - ANS✅✅who
Who are the principal architects of the UNIX operating system? - ANS✅✅Ken
Thompson and Dennis Ritchie
Why did AT&T virtually give away UNIX to the world? - ANS✅✅Because it was
prevented byt the US government from selling computer software
Where did BSD UNIX originate? Name some features of UNIX that were first
found in BSD UNIX - ANS✅✅From the University of California, Berkeley.
Vi editor, C shell, symbolic links, and TCP/IP
Which flavor of UNIX is available for free and runs on the PC? - ANS✅✅Linux
,Identify the companies associated with Solaris UNIX. - ANS✅✅Sun
Identify the companies associated with AIX UNIX - ANS✅✅IBM
Identify the companies associated with Tru64 UNIX - ANS✅✅HP (Digital)
What does X/OPEN represent? Who owns the UNIX trademark today? -
ANS✅✅a standards body now merged with The Open Group which owns the
UNIX trademark
Who are the two brains behind Linux? - ANS✅✅Richard Stallman and Linus
Torvalds
What is the distinctive characteristic about the GNU General Public License? -
ANS✅✅Software developers distributing products under this license must
make the source code public.
Why is UNIX more portable than other operating systems? - ANS✅✅Because
it is written in C, a high-level language (high-level lanuage can run without major
modifications when moved to another machine.
Can you divide UNIX into two major schools? To which school does Sun's UNIX
belong? - ANS✅✅Yes, System V (AT&T) and BSD (Berkeley): Sun is based on
BSD but Solaris is based on AT&T's SVR4
, Why do UNIX tools perform simple jobs rather than complex ones? -
ANS✅✅because complex jobs can be completed by connecting a number of
these simple ones.
What is the windowing system of UNIX known as? - ANS✅✅The X Window
system
Name some interpretive languages available on UNIX systems. - ANS✅✅The
shell, perl, tcl, and python
Name three notable Linux flavors. - ANS✅✅Fedora, suse, Ubuntu
2.1 Enter a : and press [Enter]. Next run type :. What do you conclude? -
ANS✅✅The : must be a command that does nothing. The command type :
indicates that the command is built into the shell.
2.2 UNIX commands must be in lowercase and must not have extensions. True or
false? - ANS✅✅False, you can use uppercase and provide extensions to
command filenames, although convention follows the opposite
2.3 Name three UNIX commands whose names are more than five characters
long. - ANS✅✅printf, script, and passwd.
2.4 Find out whether these commands are internal or external: echo, date, pwd,
and ls. - ANS✅✅echo and pwd are internal commands; date and ls are
external.
The xargs command - ANS✅✅Sometimes, the filenames used by commands
can be determined only at runtime. UNIX provides a real dark horse—the xargs
command—that can run any command but obtains the file list from standard
input.
Das, Sumitabha. Your UNIX/Linux: The Ultimate Guide, 3rd edition (Page 183).
McGraw-Hill Higher Education -A. Kindle Edition.
Wild cards - ANS✅✅The metacharacters used to match filenames belong to a
category called?
(Something like the joker that can match any card).
The ________ interacts with the hardware and the _________ interacts with the
user - ANS✅✅operating system, Shell
A program is synonymous with a process. True or false? - ANS✅✅False
Every character has a number associated with it. What is it called? -
ANS✅✅the ASCII value
,If you see a prompt like mailhost login:, what do you think mailhost represents? -
ANS✅✅The machine name
If the system echoes Login incorrect, does it mean that your user-id is incorrect? -
ANS✅✅Not necessarily, the password could be incorrect
Name the command you used in this chapter to display filenames. - ANS✅✅ls
Name the command you used in this chapter to display processes - ANS✅✅ps
Name the command you used in this chapter to display users. - ANS✅✅who
Who are the principal architects of the UNIX operating system? - ANS✅✅Ken
Thompson and Dennis Ritchie
Why did AT&T virtually give away UNIX to the world? - ANS✅✅Because it was
prevented byt the US government from selling computer software
Where did BSD UNIX originate? Name some features of UNIX that were first
found in BSD UNIX - ANS✅✅From the University of California, Berkeley.
Vi editor, C shell, symbolic links, and TCP/IP
Which flavor of UNIX is available for free and runs on the PC? - ANS✅✅Linux
,Identify the companies associated with Solaris UNIX. - ANS✅✅Sun
Identify the companies associated with AIX UNIX - ANS✅✅IBM
Identify the companies associated with Tru64 UNIX - ANS✅✅HP (Digital)
What does X/OPEN represent? Who owns the UNIX trademark today? -
ANS✅✅a standards body now merged with The Open Group which owns the
UNIX trademark
Who are the two brains behind Linux? - ANS✅✅Richard Stallman and Linus
Torvalds
What is the distinctive characteristic about the GNU General Public License? -
ANS✅✅Software developers distributing products under this license must
make the source code public.
Why is UNIX more portable than other operating systems? - ANS✅✅Because
it is written in C, a high-level language (high-level lanuage can run without major
modifications when moved to another machine.
Can you divide UNIX into two major schools? To which school does Sun's UNIX
belong? - ANS✅✅Yes, System V (AT&T) and BSD (Berkeley): Sun is based on
BSD but Solaris is based on AT&T's SVR4
, Why do UNIX tools perform simple jobs rather than complex ones? -
ANS✅✅because complex jobs can be completed by connecting a number of
these simple ones.
What is the windowing system of UNIX known as? - ANS✅✅The X Window
system
Name some interpretive languages available on UNIX systems. - ANS✅✅The
shell, perl, tcl, and python
Name three notable Linux flavors. - ANS✅✅Fedora, suse, Ubuntu
2.1 Enter a : and press [Enter]. Next run type :. What do you conclude? -
ANS✅✅The : must be a command that does nothing. The command type :
indicates that the command is built into the shell.
2.2 UNIX commands must be in lowercase and must not have extensions. True or
false? - ANS✅✅False, you can use uppercase and provide extensions to
command filenames, although convention follows the opposite
2.3 Name three UNIX commands whose names are more than five characters
long. - ANS✅✅printf, script, and passwd.
2.4 Find out whether these commands are internal or external: echo, date, pwd,
and ls. - ANS✅✅echo and pwd are internal commands; date and ls are
external.
