7. A filename containing a space character in a command in the Bash shell (shell ) Which of the following methods can be applied for its use ? a) Before the space character Using the backslash (1) character b) Double-clicking the file name c) Single quotation mark of the file name into to be taken d) None 8. A user can access their home Which of the following commands can be used to create an empty file named helloworld.py in the folder? ( It is known that the user is in the / tmp folder on the command line be is currently working on.) a) touch.. home/helloworld.py b) touch /helloworid py c) touch /home/helloworld.py d) touch /home/user/helloworld.py 9. Which of the following commands is used to delete a folder named OS containing files and folders ? can it be used ? a) del OS b) mrOS c) rmdir OS d) None right to write only for others from a file named " file.txt " Which of the following commands can be used to remove it? a) chmod 777 file.bxt b) chmod-wr file.txt c) chmod ow file.txt d) chmod u+x file.txt 11. Multiprogramming in a single processor system increases processor efficiency. by turning off all interrupts except high priority ones b) idle processor time cycle) reducing c) interrupt service ( interrupt long time spent handling with the use of d) None 12. At least how many threads does a process need to run in the Windows operating system ? a) 0 b) 1 c) 2 d) Windows processes do not use threads. 13. From the thread libraries below ( thread libraries) which have indirect ( implicit ) thread support? a) grand central dispatch b) Java c) OpenMP d) None