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Operating System
1081
Computer Science Fundamentals
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Computer Science Fundamentals
How many flip-flops are there in a flag register of 8085 microprocessor?
4
5
7
10
There are five flags or flip-flops in a flag register in 8085 microprocessor that shows the status after ALU operation. They are mainly affected by the content of the accumulator.
Author:
rikazzz
Comment
OS Protection
What is not true regarding ‘Fence’?
It is implemented via hardware register
It doesn’t protect users from each other
It good to protect OS from abusive users
Its implementation is unrestricted and can take any amount of space in Operating system.
Author:
rikazzz
Comment
OS Processes
Which of the following need not necessarily be saved on a context switch between processes?
General purpose registers
Translation lookaside buffer
Program counter
All of the mentioned
Translation Look-aside Buffer (TLB) need not necessarily be saved on a context switch between processes. A special, small, fast-lookup hardware cache is called Translation Look-aside Buffer. TLB used to reduce memory access time.
Author:
rikazzz
Comment
OS Distributed File Systems
What things are the transaction coordinator is responsible for?
Starting the execution of the transaction
Breaking transaction into a number of subtransactions
Coordinating the termination of the transaction
All of the mentioned
Author:
rikazzz
Comment
Computer Science Fundamentals
______________ help us to see patterns.
Spreadsheets
Calculations
Charts
Graphs
Charts in spreadsheets give us a picture of our data. It can help us to see patterns as well.
Author:
rikazzz
Comment
OS The Linux System
When a program tries to access a page that is mapped in address space but not loaded in physical memory, then ____________
segmentation fault occurs
fatal error occurs
page fault occurs
no error occurs
Author:
rikazzz
Comment
Computer Science Fundamentals
BOOLEAN is a type of data type which basically gives a tautology or fallacy.
True
False
A Boolean representation is for giving logical values. It returns either true or false. If a result gives a truth value, it is called tautology whereas if it returns a false term, it is referred to as fallacy.
Author:
rikazzz
Comment
OS The Linux System
Which of the following calls never returns an error?
getpid
fork
ioctl
open
Author:
rikazzz
Comment
Computer Science Fundamentals
A type of cipher that uses multiple alphabetic strings.
Substitution based
Transposition-based
Polyalphabetic substitution based
Mono alphabetic substitution based
These ciphers are similar to that of mono alphabetic ciphers. Multiple strings are used to encode the plain text.
Author:
rikazzz
Comment
OS CPU Scheduling
The portion of the process scheduler in an operating system that dispatches processes is concerned with ____________
assigning ready processes to CPU
assigning ready processes to waiting queue
assigning running processes to blocked queue
all of the mentioned
Author:
rikazzz
Comment
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