Operating Systems 2015F: Assignment 5 - Revision history

Soma at 20:43, 19 November 2015

2015-11-19T20:43:30Z

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 #* Every memory access then requires a system call.
 #* The page table has to be checked on every memory access
 #* The process table has to be updated on every tick interval.
 #* None of the above

Soma at 13:59, 16 November 2015

2015-11-16T13:59:59Z

← Older revision		Revision as of 13:59, 16 November 2015
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	~~'''This assignment is not yet finalized'''~~

	# Within a UNIX filesystem, one inode can be referred to by many different pathnames (filenames). What is another term for these names?		# Within a UNIX filesystem, one inode can be referred to by many different pathnames (filenames). What is another term for these names?
	#* hard links		#* hard links

Soma at 05:12, 13 November 2015

2015-11-13T05:12:23Z

← Older revision		Revision as of 05:12, 13 November 2015
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	#* contents of data blocks of regular files		#* contents of data blocks of regular files
	#* block free list		#* block free list
	# If a system automatically boots into a defective kernel (e.g., one that crashes on startup), you can recover the system by:		# If a system automatically boots into a defective kernel (e.g., one that crashes on startup), you can recover the system by:
	#* Select a different kernel in the bootloader		#* Select a different kernel in the bootloader
	#* Perform a soft reboot of the system		#* Perform a soft reboot of the system

Soma at 05:11, 13 November 2015

2015-11-13T05:11:38Z

← Older revision		Revision as of 05:11, 13 November 2015
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	#* Allocate a logical address space to each process that is distinct from the physical memory map		#* Allocate a logical address space to each process that is distinct from the physical memory map
	#* All of the above		#* All of the above
	# The ``dirty'' bit in a page table entry		# The ``dirty'' bit in a page table entry indicates that:
	indicates that:
	#* A security violation has occurred		#* A security violation has occurred
	#* The corresponding page has been accessed.		#* The corresponding page has been accessed.

Soma at 05:11, 13 November 2015

2015-11-13T05:11:15Z

← Older revision		Revision as of 05:11, 13 November 2015
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	#* a TCP/IP stack		#* a TCP/IP stack
	#* All of the above		#* All of the above
	# An OS that is based upon a microkernel		# An OS that is based upon a microkernel architecture will typically:
	architecture will typically:
	#* have most device drivers and filesystem code run within separate userspace processes		#* have most device drivers and filesystem code run within separate userspace processes
	#* have most OS code run in CPU supervisor mode		#* have most OS code run in CPU supervisor mode
	#* support loadable kernel modules		#* support loadable kernel modules
	#* All of the above		#* All of the above
	# A typical executing application is best		# A typical executing application is best described as a:
	described as a:
	#* kernel		#* kernel
	#* process		#* process

Soma at 05:10, 13 November 2015

2015-11-13T05:10:42Z

← Older revision		Revision as of 05:10, 13 November 2015
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	'''This assignment is not yet finalized'''		'''This assignment is not yet finalized'''

	# Within a UNIX filesystem, one inode can be		# Within a UNIX filesystem, one inode can be referred to by many different pathnames (filenames). What is another term for these names?
	referred to by many different pathnames (filenames). What is
	another term for these names?
	#* hard links		#* hard links
	#* symbolic links		#* symbolic links

Soma: Created page with "'''This assignment is not yet finalized''' # Within a UNIX filesystem, one inode can be referred to by many different pathnames (filenames). What is another term for th..."

2015-11-13T05:10:28Z

Created page with "'''This assignment is not yet finalized''' # Within a UNIX filesystem, one inode can be referred to by many different pathnames (filenames). What is another term for th..."

New page

'''This assignment is not yet finalized'''

# Within a UNIX filesystem, one inode can be
referred to by many different pathnames (filenames). What is
another term for these names?
#* hard links
#* symbolic links
#* URLs
#* all of the above
# A modern monolithic operating system kernel typically implements
#* scheduling \& address space management
#* some device drivers
#* a TCP/IP stack
#* All of the above
# An OS that is based upon a microkernel
architecture will typically:
#* have most device drivers and filesystem code run within separate userspace processes
#* have most OS code run in CPU supervisor mode
#* support loadable kernel modules
#* All of the above
# A typical executing application is best
described as a:
#* kernel
#* process
#* thread
#* system call
# When a running program X requests data from a file F whose contents are on disk, the OS will:
#* save X's current state
#* schedule a disk request for F's data blocks
#* load the state of another ready-to-run program Y (which may be X)
#* All of the above
# When a regular process is running on a single-CPU system, all of the following are true '''except''':
#* The kernel is running.
#* Disks can be writing data to memory.
#* The CPU will generate an exception (software interrupt) if certain addresses are accessed.
#* The CPU is in user mode.
# Modern virtual memory systems:
#* Logically divide RAM into fixed-sized chunks
#* Store portions of processes on disk
#* Allocate a logical address space to each process that is distinct from the physical memory map
#* All of the above
# The ``dirty'' bit in a page table entry
indicates that:
#* A security violation has occurred
#* The corresponding page has been accessed.
#* The corresponding page has been modified.
#* The corresponding page is shared between multiple processes.
# An inode contains all of the following '''except''':
#* user ID
#* filename
#* time of last data modification
#* link count
# When checking the consistency of a filesystem (e.g. after a loss of power), all of the following must be checked '''except''':
#* inode reference counts
#* pointers to data blocks (in inodes or indirect blocks)
#* contents of data blocks of regular files
#* block free list
# If a system automatically boots into a defective kernel (e.g., one that crashes on startup), you can recover the system by:
#* Select a different kernel in the bootloader
#* Perform a soft reboot of the system
#* Perform a hard reboot of the system
#* Press Alt-SysRq-R
# Virtual memory is prohibitively expensive on a system that lacks a TLB because
#* Every memory access then requires a system call.
#* The page table has to be checked on every memory access
#* The process table has to be updated on every tick interval.
#* None of the above