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Operating System
1081
Computer Science Fundamentals
998
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OS File Systems and Their Implementation
In indexed allocation _____________
each file must occupy a set of contiguous blocks on the disk
each file is a linked list of disk blocks
all the pointers to scattered blocks are placed together in one location
none of the mentioned
Author:
rikazzz
Comment
OS Deadlocks
For a deadlock to arise, which of the following conditions must hold simultaneously?
Mutual exclusion
No preemption
Hold and wait
All of the mentioned
Author:
rikazzz
Comment
OS File Systems and Their Implementation
A consistency checker __________________ and tries to fix any inconsistencies it finds.
compares the data in the secondary storage with the data in the cache
compares the data in the directory structure with the data blocks on disk
compares the system generated output and user required output
all of the mentioned
Author:
rikazzz
Comment
OS Memory Management
The backing store is generally a ____________
fast disk
disk large enough to accommodate copies of all memory images for all users
disk to provide direct access to the memory images
all of the mentioned
Author:
rikazzz
Comment
OS I/O Systems
If the number of cycles spent busy – waiting is not excessive, then ____________
interrupt driven I/O is more efficient than programmed I/O
programmed I/O is more efficient than interrupt driven I/O
both programmed and interrupt driven I/O are equally efficient
none of the mentioned
Author:
rikazzz
Comment
OS Mass-Storage Structures
When hardware is accessed by reading and writing to the specific memory locations, then it is called ____________
port-mapped I/O
controller-mapped I/O
bus-mapped I/O
none of the mentioned
It is called memory-mapped I/O.
Author:
rikazzz
Comment
Computer Science Fundamentals
A set of libraries that provide programmatically access to some kind of graphics 2D functions.
Graphics Package
Formatting Package
Animation Package
Design Package
A set of libraries that provide programmatically access to some kind of graphics 2D functions comes under the graphics package. Their types are GKS, PHIGS, etc.
Author:
rikazzz
Comment
OS Protection
What is the correct way the segmentation program address is stored?
name, offset
start, stop
access, rights
offset, rights
OS can retrieve the real address via looking for the table then making a simple calculation: address of the name + offset.
Author:
rikazzz
Comment
OS I/O Systems
Division by zero, accessing a protected or non existent memory address, or attempting to execute a privileged instruction from user mode are all categorized as ________
errors
exceptions
interrupt handlers
all of the mentioned
Author:
rikazzz
Comment
OS File Systems and Their Implementation
Management of metadata information is done by ____________
file-organisation module
logical file system
basic file system
application programs
Author:
rikazzz
Comment
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