User Mode vs Kernel Mode

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High level description of User Mode vs Kernel Mode, which is important to understand OS internals.
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Excellent video! Thanks for the information. :D

princessEiram
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good video, thanks for the information .

anuragchatap
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Nice description ...plz make more videos

dond
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try giving some videos or picture.. which make us understand easy and fast

nisillamsal
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Nice Video...

Can you maybe make a video and explain it: who can be in that mode, why we need these modes and to discuss issues with these modes in Virtualization ?!

Thnx!

albertzabergja
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Sir, thank you for making the concept clear. but how kernel level thread communicate with user level threads for e.g when a file open request is made by user level thread in a program like Java.

UserBkj
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Hello every one. Im reading my MCSA and on preparing the upgrade section it is mentioned that "All kernel-mode software on the server, including device drivers, must be digitally signed" or the upgrade will fail. What does this mean?

mokgoptm
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Can you please say a few words about time consuming while a program goes from user space to kernel space and vica verca?

dima
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Thanks for ur information try to make some visual images

madhavprasad
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Can you please tell me ?Why we are calling user mode thread is so cheap?

bi