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Operating System
1081
Computer Science Fundamentals
998
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OS I/O Systems
The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.
interrupt request line
interrupt bus
interrupt receive line
interrupt sense line
Author:
rikazzz
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OS Process Synchronization
In the bakery algorithm to solve the critical section problem ____________
each process is put into a queue and picked up in an ordered manner
each process receives a number (may or may not be unique) and the one with the lowest number is served next
each process gets a unique number and the one with the highest number is served next
each process gets a unique number and the one with the lowest number is served next
Author:
rikazzz
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OS Distributed Communication
When high priority task is indirectly preempted by medium priority task effectively inverting the relative priority of the two tasks, the scenario is called __________
priority inversion
priority removal
priority exchange
priority modification
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rikazzz
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OS Protection
Who can add new rights and remove some rights?
copy
transfer
limited copy
owner
Author:
rikazzz
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OS Distributed Communication
What is an interrupt vector?
It is an address that is indexed to an interrupt handler
It is a unique device number that is indexed by an address
It is a unique identity given to an interrupt
None of the mentioned
Author:
rikazzz
Comment
OS File Systems and Their Implementation
In contiguous 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 Distributed File Systems
Which are the two complementary deadlock-prevention schemes using timestamps?
The wait-die & wound-wait scheme
The wait-n-watch scheme
The wound-wait scheme
The wait-wound & wound-wait scheme
Author:
rikazzz
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Computer Science Fundamentals
The zone of alphabetic characters from A to O in ASCII is _____________
1000
0100
0010
0001
The zone used by ASCII for alphabets is 0100. For e.g. A is represented as 0100(zone)0001(digit). The hex equivalent is 41 for A. The zone used by numbers is 0011.
Author:
rikazzz
Comment
Computer Science Fundamentals
What does a microprocessor understand after decoding opcode?
Perform ALU operation
Go to memory
Length of the instruction and number of operations
Go to the output device
After decoding the opcode of the instruction, a microprocessor understands the length of the instruction and the total number of operations to be performed.
Author:
rikazzz
Comment
OS Mass-Storage Structures
Random access in magnetic tapes is _________ compared to magnetic disks.
fast
very fast
slow
very slow
Author:
rikazzz
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