1) Semaphore used to?

a)Avoid deadlocks
b)Communicate messages
c)Synchronice the access to shared resources
d)none of the above

Answer is Synchronice the access to shared resources

2) The number of address lines required to address 1MB memory are?

a)10
b)24
c)16
d)20

Answer is 20

3) In signed magnitude notation what is the minimum value that can be represented with 8 bits

a)-128
b)-255
c)-127
d)0

Answer is -128

4) Bit parity check can performed on a byte can catch

a)Any number of errors
b)Odd number or errors
c)Even number of errors
d)None of the above

Answer is Odd number or errors