CS302 Midterm Past Papers by Junaid

Q1. Which of the following is a volatile memory?

1. PROM
2. DRAM
3. EPROM
4. EEPROM
5. ________ is used when the output is connected back to the input of the PAL or if the output pin is used as an input only.
6. Combinational Input/output
7. Combinational Output
8. Combinational Input AL-JUNAID INSTITUTE OF GROUP
9. Programmable polarity
10. The AND Gate performs a logical ________ function.
11. Addition
12. Subtraction
13. Multiplication
14. Division
15. The Adjacent 1s Detector accepts 4-bit inputs. If ________ adjacent 1s are detected in the input, the output is set to high.
16. 2
17. 4
18. 1
19. 0

Q5. In the keyboard encoder, how many times per second does the ring counter scan the key board?

1. 600 scans/second
2. 625 scans/second
3. 650 scans/second
4. 700 scans/second
5. The FAST Model Page Access allows ________ memory read and access times when reading successive data values stored in consecutive locations on the same row.
6. Slow
7. Faster
8. Medium
9. Modern
10. GAL can be reprogrammed as instead of fuses E2CMOS logic is used which can be programmed to connect a ________ with a ________.
11. column, row
12. row, column
13. column, column
14. row, row

Q8. Which of the following Output Equations determines the output of the State Machine?

1. MIN = Q0Q1
2. MAX = Q0Q1EN
3. MIN = Q0Q1EN
4. MAX = Q1EN
5. The maximum value, represented by a single hexadecimal digit is ________.
6. "E"
7. "F"
8. "G"
9. "H"

10. If the voltage drop across the active load is 0 volts due to absence of current the comparator output is a

1. 0
2. 1

11. The Static Ram (SRAM) is non-volatile and is not a ________ density memory as a latch is required to store a single bit of information.

1. Low
2. High
3. Medium
4. Hot

12. DE Morgan’s two theorems prove the equivalency of the NAND and ________ gates and the NOR and ________ gates respectively.

1. Negative-OR, Negative-AND
2. Negative-AND, Positive-OR
3. Positive-OR, Negative-AND
4. Positive-OR, Positive-AND

13. Two signals ________ and ________ provide the timing inputs to the State Machine.

1. NSSR and EWSR
2. LTIME and STIME
3. PTIME and QTIME
4. NSGrn and NSYel

14. The 74HC163 is a 4-bit Synchronous counter, it has ________ data output pins.

1. 2
2. 4