Digital Computer Electronics – Section 2

1. If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory location?

A. 0000, EEEE
B. 0, 64
C. 0000, FFFF
D. 0000, 9999
E. None of the above

Correct Answer:  C. 0000, FFFF

2. A microprocessor has memory locations from 0000 to 3FFF. Each memory location stores 1 byte. How bytes can the memory store? Express this in kilobytes?

A. 4,095, 4K
B. 16,384, 16K
C. 32,740, 32K
D. 46,040, 46K
E. None of the above

Correct Answer:  B. 16,384, 16K

3. The m-bit parallel adder consists of:

A. (m+1) full adders
B. m/2 full adders
C. m-1 full adders
D. m full adders
E. None of the above

Correct Answer:  D. m full adders

4. An OR gate has 6 inputs. How many input words are in its truth table?

A. 64
B. 32
C. 16
D. 128
E. None of the above

Correct Answer:  A. 64

5. Which TTL sub-family has maximum speed?

A. standard TTL
B. schottky-clamped TTL
C. high speed TTL
D. low power TTL
E. None of the above

Correct Answer:  B. schottky-clamped TTL

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