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Operating System
1081
Computer Science Fundamentals
998
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OS Deadlocks
For a Hold and wait condition to prevail ____________
A process must be not be holding a resource, but waiting for one to be freed, and then request to acquire it
A process must be holding at least one resource and waiting to acquire additional resources that are being held by other processes
A process must hold at least one resource and not be waiting to acquire additional resources
None of the mentioned
Author:
rikazzz
Comment
OS Mass-Storage Structures
Whenever a process needs I/O to or from a disk it issues a ______________
system call to the CPU
system call to the operating system
a special procedure
all of the mentioned
Author:
rikazzz
Comment
Computer Science Fundamentals
Process of evaluating a system to verify whether or not it is meeting its objectives.
System Maintenance
System Evaluation
System validation
System authorization
Process of evaluating a system (after it is put in operation) to verify whether or not it is meeting its objectives is called as system evaluation.
Author:
rikazzz
Comment
OS File Systems and Their Implementation
____________ writes occur in the order in which the disk subsystem receives them, and the writes are not buffered.
Asynchronous
Regular
Synchronous
Irregular
Author:
rikazzz
Comment
OS The Linux System
Which of the following is the drawback of the One to One Model?
increased concurrency provided by this model
decreased concurrency provided by this model
creating so many threads at once can crash the system
creating a user thread requires creating the corresponding kernel thread
Author:
rikazzz
Comment
OS The Linux System
There is a set of page replacement algorithms that can never exhibit Belady’s Anomaly, called ____________
queue algorithms
stack algorithms
string algorithms
none of the mentioned
Author:
rikazzz
Comment
OS I/O Systems
A keyboard is an example of a device that is accessed through a __________ interface.
block stream
set of blocks
character stream
none of the mentioned
Author:
rikazzz
Comment
OS File Systems and Their Implementation
A relative block number is an index relative to ____________
the beginning of the file
the end of the file
the last written position in file
none of the mentioned
Author:
rikazzz
Comment
OS Distributed Communication
In a memory mapped input/output __________
the CPU uses polling to watch the control bit constantly, looping to see if a device is ready
the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available
the CPU receives an interrupt when the device is ready for the next byte
the CPU runs a user written code and does accordingly
Author:
rikazzz
Comment
OS The Linux System
Which of the following system calls does not return control to the calling point, on termination?
fork
exec
ioctl
longjmp
Author:
rikazzz
Comment
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