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What is the type of disk operating system?
a) single-tasking          
b) uni-tasking
c) multi-tasking
d) none of these

b

Which of the following command is used for change directory in disk operating system?
a) CD                          
b) DC
c) change directory      
d) none of these

a

Explanation: CD stand for Change directory



Which command used for copy files in disk operating system?
a) CP                           
b) COPY
c) Ctrl + C                   
d) none of these

b

Which command used for deleting files in disk operating system?
a) DEL                        
b) COPY
c) Ctrl + delete 
d) none of these

a

Explanation: DEL stand for delete



Which of the following command is used to show list directories?
a) DER                        
b) DIR
c) DR                          
d) none of these

b

Explanation: DIR stand for directory



Which of the following command is used to edit plain text files?
a) DER                        
b) DIR
c) EDIT                                  
d) none of these

c