CS501 Current Final Term Fall 2013 Shared by MCS_2nd File 9

 objective , 8 se 10 mcq;s from past ,last tw0 chaptr se 6 mcqs aaey thy , bandwiidth , latency aur transmition , k hawaly se

ye bhi quiz men tha

 For write to complete in Write through, the CPU has to wait. This wait state is called write stall.

Subjective,

what is pakcket switchin?

A block (an appropriate number of bits) of data is called a packet. Transfer of data in the form of packets through different paths in a network is called packet switching.

What is PROM?

The  stands for Programmable Read only Memory. It is also nonvolatile and may be written into only once. For PROM, the writing p rocess is performed electrically in the field. PROMs provide flexibility and convenience.

Synchrounous ki three states likhni thi ,

Synchronous:
· Characters are sent back to back.
· Must include special "sync" characters at the beginning of each message.
· Must have special "idle" characters in the data stream to fill up the time when no i

What is overflow condition?

When two m-bit numbers are added and the result exceeds the capacity of an m-bit destination, this situation is called an overflow. The condition that occurs when a calculation produces a result that is greater in magnitude than that which a given register or storage location can store or represent is called over flow condition

waht is Synchronous and Asynchronous aproach in aperating system ,see 23 lecture

Asynchronous activity:
Memory subsystems are almost always synchronous. This means that most memory
transfers are governed by the CPU’s clock. Generally this is not the case with I/O
subsystems. Additional signals, called handshaking signals, are needed to take care of
asynchronous I/O transfers.

Synchronous

The master and the slave are assumed to be permanently connected together, so that there is no need for the selection of the particular slave device out of the many devices that may be present in the system. It is also assumed that the slave device can perform the transfer at the speed of the master, so no handshaking signals are needed.

Q. Write Steps for Floating-Point Multiplication.
 The floating-point multiplication uses the following steps:·
 Unpack sign, exponent and significands·
 Apply exclusive-or operation to signs, add exponents and then multiply significands.·
 Normalize, round and shift the result.·
 Check the result for overflow.·
 Pack the result and report exceptions.·

3 numerical , thy 1 ye wala

Q. Consider a 64KB direct-mapped cache with a line length of 32 bytes. (Marks 5) a. Determine the number of bits in the address that refer to the byte within a cache line. b. Determine the number of bits in the address required to select the cache line.

Sol. n = log2 of number of bytes in line m = log2 of number of lines in cache a. For the given cache, the number of bits in the address to determine the byte within the line = n = log232 = 5 b. There are 64K/32= 2048 lines in the given cache. The number of bits required to select the required line = m =log22048 = 11 Hence n = 5 and m = 11 for this example.

and other was   about frequensy , and other was about fraction , ap ko bs formuly anay chaey ,

,DmA controller k abarey men q tha cycle stealing ka ,

CYCLE STEALING: Taking control of the system bus for a few bus cycles.

what is programmeable I/o ports ,

ANS:

serial

parrallel

bs yhi thy

, ye sb k sb mmery aj k paper men thy , mcq  k liye sb defination ani chaey