KTMT & HN

Which is correct about dual-layer DVD?

• contains layers on both sides of the disk for writing data to

• DVD drives has double laser head for reading from or writing to this disk

• the same as double-sided DVD

• contains two layers on a single side for writing data to

In computer, how does the processor serve multiple interrupt request from devices?

• Device with higher priority will use interrupt enable flag

• Priority is assigned to each device, the one with higher priority will be connected to lower order Interrupt Request (IRQ) line

• The processor can not process multiple interrupt requests

• Priority is assigned to each device, the one with lower priority will be served

What is correct about the function of TRIM command in SSD? 

• Allow SSD to allocate memory pages in blocks properly for faster access

• Allow OS to notify SSD the presence of occupied blocks of data which are no longer in use and can be erased internally

• Allow SSD to defragment scattered data stored in separate pages

• Allow SSD to manage occupied pages and remove them automatically for later use

Given 8-bit floating-point binary format:  1 (sign) + 3 (exponent) + 4 (mantissa) Convert the 8-bit floating point number d3 (in hex) to decimal.

• 2.5

• 3.2

• 4.75

• -4.75

Consider a 32-bit microprocessor whose bus cycle is the same duration as that of a 16-bit microprocessor. Assume that, on average, 30% of the operands and instructions are 32 bits long, 40% are 16 bits long, and 30% are only 8 bits long. Calculate the improvement achieved when fetching instructions and operands with the 32-bit microprocessor?

• 10%

• 15%

• 33%

• 17%

Sign-extend number 82 (8-bit) to 16-bit. Write result in hex

• 1202

• A203

• 0052

• C409

In the interconnection system among computer components (e.g.. CPU, Memory, I/O) the number of address line governs: 

• The maximum physical memory size that the CPU can address

• Size of cache memory

• Size of I/O port

• Size of memory word

In 16-bit real mode, which set of registers are legal for addressing a stack memory location?

Select one or more:

• SS:SP

• SS:BP

• DS:SI

• SS:BX

Part of memory as shown in figure

• little-endian

• level-endian

• big-endian

• non-endian

• little-endian

• non-endian

• level-endian

• big-endian