1. The closer the memory to the CPU, the faster it is. 2. The 2’s complement rep
ID: 3621482 • Letter: 1
Question
1. The closer the memory to the CPU, the faster it is.
2. The 2’s complement representation of a positive number is its two’s
complement.
3. Direct Memory Access I/O technique requires an additional
hardware element to control the transfer of data.
4. If the following microoperation appears in a program, it will cause an
infinite loop
T: R2 R1, R1 R2
5. If there is a carry out after an addition in unsigned representation,
then there is an over-flow.
6. If the decimal point is assumed to be at the extreme right in fixed–
point representation than all numbers must be represented as fractions.
7. The largest number that can be represented using a floating-point
number with 12 bits for the mantissa and 10 bits for the exponent is:
(1-2-11) X 2(2047+1)
8. When performing an arithmetic right shift on a signed number we
always insert 0’s in the most significant bit.
9. A 4-to-1 MUX is usually built as a 2-to-4 decoder controlling 4 tristate buffers.
10. The main job of the control unit is to produce control signals at the
right time to control the operation of the hardware.
Explanation / Answer
1. False. Typically this is true but not always. 2.True. 3. True 4. True. 5. False. It's possible but not always. 6. False. its should be extreme left 7. I believe this one is true but I'm not sure. Sorry. 8. True 9. I don't remember sorry. 10. False. I can see how this one COULD be true however, it seem like a trick question. It's main function is more to control the operation of the CPU. The CPU's main job is to produce control signals at the right time to control the operation of the hardware.
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