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Operating System
1081
Computer Science Fundamentals
998
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OS The Linux System
Which of the following page replacement algorithms suffers from Belady’s Anomaly?
Optimal replacement
LRU
FIFO
Both optimal replacement and FIFO
Author:
rikazzz
Comment
Computer Science Fundamentals
The general form for calculating the number of rows in a truth table is ________
2n
2n+1
2n
2n+1
The general form for the calculation of rows in a truth table is 2n . Here, n= number of literals in the function.
Author:
rikazzz
Comment
OS File Systems and Their Implementation
Disks are segmented into one or more partitions, each containing a file system or ______
left ‘raw’
made into swap space
made into backup space
left ‘ripe’
Author:
rikazzz
Comment
Computer Science Fundamentals
Which of the following is capable of recognizing a pre-specified type of mark by pencil or pen?
OMR
Winchester
Bar code reader
Image Scanner
OMR stands for optical mark reader. These are very useful for grading tests with objective type questions or for any input data that is of choice or selection nature.
Author:
rikazzz
Comment
OS File Systems and Their Implementation
On systems where there are multiple operating system, the decision to load a particular one is done by _____________
boot loader
bootstrap
process control block
file control block
Author:
rikazzz
Comment
OS Memory Management
Consider a computer with 8 Mbytes of main memory and a 128K cache. The cache block size is 4 K. It uses a direct mapping scheme for cache management. How many different main memory blocks can map onto a given physical cache block?
2048
256
64
8
Author:
rikazzz
Comment
OS Distributed File Systems
What is the coherency of replicated data?
All replicas are identical at all times
Replicas are perceived as identical only at some points in time
Users always read the most recent data in the replicas
All of the mentioned
Author:
rikazzz
Comment
OS Security
What is the breach of integrity?
This type of violation involves unauthorized reading of data
This violation involves unauthorized modification of data
This violation involves unauthorized destruction of data
This violation involves unauthorized use of resources
Author:
rikazzz
Comment
OS Security
What are the drawbacks of the host based IDS?
Unselective logging of messages may increase the audit burdens
Selective logging runs the risk of missed attacks
They are very fast to detect
They have to be programmed for new patterns
Author:
rikazzz
Comment
OS Distributed File Systems
Implementation of a stateless file server must not follow?
Idempotency requirement
Encryption of keys
File locking mechanism
Cache consistency
Author:
rikazzz
Comment
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