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What is shell? Group of answer choices User command interpreter providing CLI interface to users and communicating with kernel to execute commands It is a protective cover (shell) for the operating system Operating system software interface to the hardware Command interpreter providing GUI interface to applications and directly executing them

What is shell? Group of answer choices User command interpreter providing CLI interface to users and communicating with kernel to execute commands It is a protective cover (shell) for the operating system Operating system software interface to the hardware Command interpreter providing GUI interface to applications and directly executing them

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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What is shell?
Group of answer choices
User command interpreter providing CLI interface to users and communicating with kernel to execute commands
It is a protective cover (shell) for the operating system
Operating system software interface to the hardware
Command interpreter providing GUI interface to applications and directly executing them
 
How does shell identify whether the user typed command exists or not?
Group of answer choices
All the user commands are built in shell software and hence it knows all the valid commands
Shell asks the kernel to check for valid/invalid command
Shell asks the operating system to check for valid/invalid command
By searching the directories specified in the PATH variable looking for a filename same as the user specified command name and looking at the list commands built in the shell program.
 
Which are not system directories?
Group of answer choices
/bin, and /etc
/dev and /
/user and /users
/var and /proc
 
 
 
What does .. in the relative pathname represent?
Group of answer choices
Represents grandparent (parent of parent, that is, two level above) of the current directory
Represents the current directory
Represents parent directory of the current directory
Cannot use .. in the pathname
 
 
 
Where does relative pathname start?
Group of answer choices
At current directory
At parent directory
At root directory
At system directory
 
 
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