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self doubt about dense index
In dense index the index is created for every search key value, does it mean for every record there will be an entry in the dense index? if yes then clustering index need not be dense because clustering index will be created for the clustered attribute ... index and hence for every record there is not an entry in clustering index, thus it is non-dense. What is it?
commented
in
Databases
Nov 13, 2018
381
views
1
answer
2
self doubt.
who is responsible for changing the mode bit of the system. Is it the privileged or the non-privileged instruction? some authors are writing that it can be privileged or non-privileged instruction if it is non-privileged instruction then a process running in user mode ... it should not be running in kernel mode? so in conclusion what is needed to shift from kernel mode to user mode?
asked
in
Operating System
Oct 23, 2018
138
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0
answers
3
test series
A: B: while true do while true do { { wait(p); wait(p); wait(q); wait(q); x=x+1; y=y+1; y=y-1; x=x-1; signal(p); signal (q); signal(q); signal(p); } } Two processes A and B, Is bounded guaranteed , if yes then how ?
commented
in
Operating System
Sep 15, 2018
393
views
0
answers
4
test seiries
which of the following require executing code in kernel mode ? a) semaphore p operation. b) making system call. c) disabling interrupts. d) b and c.
asked
in
Operating System
Sep 15, 2018
85
views
1
answer
5
doubt about interrupts
Are interrupts disabled in kernel mode ?
asked
in
Operating System
Sep 13, 2018
188
views
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