Creatign two threads to display the task bar and do the background processing..

..under construction......

Some Questions Compilation

Hi
here is my effort to compile few interview questions being asked in one of the susidiary of a top notch Phone making MNC..

Delegates in C#
uart baud rate y 115200, why these numbers why not some other..
udev, interface ..
hw/sw flow control in uart
programm to dlete a node, a loong node w/o any temporary variable
work queue, tasklets
system v ipc
send messg and post messge in system v ipc
pasing by pointer and refernce in c
where does the arguments of a funtion gets stored in memory (bss or stack)
why the irqs are diabled at boot loader stage
inhritance and polymorphism in c++, virtual functions, what is copy constructor and what is singleton class.
volatile?is it a storage class or compiler directive
way to pass signals in process
how the memory can be allocated in kernel w/o malloc,kalloc, vmalloc - ans get pages , oage level apis ,
mmap ??
memory map and io mapped io
main()
{

fork();
printf("abc")

}
how many times abc will be printed?what if fork is used three times
what is daemon , how it is created and destroyed, thier role
question aabout projects..
version of .NET , why 3.5 why not 2.0
win ce questions if you know
how many bits /per pixel were there in the monochrome lcd we use in the driver
whatis input sub sytem
what is proc file system , there use
what is /etc/fsstab what is /etc/rc.d used for, why ?
assembly level programmin , you know?what?where have you used?
synchronisation primitives
what is atomic_t variables
which is better mutex or atomic_t>?why?
what are spinlocks..
IDES used for development..
your interesets, i have written blogging
mobile phones,
what is the gps latitudde /longitude of bangalore??
what is almanac data in gps
output of ++*p, precedence of * over /....

1. ARM-- prefetch abort-- who sets the permission.. if processor, then why processor can't access the instruction

how the processor returns from supervisor mode to user mode. If user application calls system call to go into kernel mode, how the transition happens in ARM and how it gets back to user.


2. I2C-- The I2C core is currently handling i2c_write() from EEPROM and RTC is trying write on i2c bus, how the core handles this condition.

before i2c_write should it always check for bus busy, and wait in a while loop.
i2c adapter driver vs i2c client driver. Function calls in linux for both

3. LCD-- what are the layers in video linux,
what are the function calls in linux for LCD,
how the mapped memory from user goes into LCD controller.
how data from LCD contoller goes to user mode.
how LCD controller gets the video data from user.
if user calls mmap, how the kernel gets the arguments from user.
what mmap does.
In which part of the memory the user video data resides and where the kernel mapped video data resides.

4. What is the address space of linux kernel.

5. examples of volatile where u used it. how to use volatile in hardware registers, write the C code for it. how does ioremap() works. how the device register memory gets mapped into linux kernel address space.

6. Describe the boot steps. In which part of the memory the kernel resides. Which flash u used in your system. How linux boots from flash memory.

Tryst with Hawkboard - Day 1

..Saurav brought one hawkboard last to last night..out of sheer adrenaline push amidst his fellow coleegaues and ordered me to book the 11-1 am slot for our"only new found love - Linux/Android".And whats the use w/o a hw board if linux has to be waken up ..so it came witha grand entry for INR ****..yeh it was close to four dgits.So worth head banging for such a time slot ..
What we did in this slot :

Our ijob was to connect the board with serial port and get it booted and see the hawkboard prompt on our host machine..that was our moment of glory..as if we had discovered America..
We had a serial to USB converter and we connected it on our laptop as our laptops doesn't supports the serial port(all it has was a good for nothing never usable VGA parallel port)We tried , get it connected , some baud rate and serial port configuration on the hyperterminal , some button pressing, we got nothinng....again some change in configuration here and there googling and found the same state...still nothing...we went to the another pre historic desktop and planned to give up the USB converter and use directly the serial cable ..and blaaahhhhhhhhhhhhhh....got the hawkboard screen display on hyperterminal....we feel ecstatic...now get it done on the USB serial converter on our laptop...
Opened minicom and set its port by .dev/ttyUSB01 and yes we were able to get it briught up using the serial port as well !!