there is little difference in both of these commends...
su --> just switch you to user mode (root) but didn't provide the complete user environment
su - ---> provide you the complete user environment and also direct jump to user home directory.
The system calls in UNIX is written using which language? a) C b) C++ c) Assembly Language d) Fortran
Which of the following enables multi-tasking in UNIX? a) Time Sharing b) Multi programming c) Multi user d) Modularity
Which of the following is considered as the super daemon in Unix? a) sysinit b) init c) inetd d) proc
Unix is which kind of Operating System? a) Multi User b) Multi Processes c) Multi Tasking d) All the above
SVR4 stands for? a) Standard Version Release 4 b) System Version Release 4 c) Standard Five Release 4 d) System Five Release 4
Lp0 device file is used to access a) Floppy b) Cdrom c) Printer d) Tape drive
Syntax of any Unix command is a) command [options] [arguments] b) command options [arguments] c) command [options] [arguments] d) command options arguments
SVR4 was developed by a) Sun Microsystems b) AT&T c) University of Berkeley d) Sun and AT&T jointly
Which of the following statement is FALSE? a) Unix supports multiple users b) Linux is an open source operating system and the source code is shared c) Shell takes care of inter process communication d) Shell provides the feature of I/O Redirection
Which of the following UNIX flavor is from IBM? a) BSD b) Solaris c) HP-UX d) AIX
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