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December 22, 2020

Which of the following is (are) true about normally open single pole relays?

1.Which of the following memory supports Execute in Place (XIP)?

(a) EEPROM (b) NOR FLASH (c) NAND FLASH (d) both (b) and (c)

(e) None of these19. How many memory cells are present in 1Kb Serial EEPROM

(a) 1024 (b) 8192 (c) 512 (d) 4096 (e) None of these

2. Which of the following is (are) example(s) for the input subsystem of an embedded system dealing with digital data?

(a) ADC (b) Optocoupler (c) DAC (d) All of them

(e) only (a) and (b)

3. Which of the following is (are) example(s) for the output subsystem of an embedded system dealing with digital data?

(a) LED (b) Optocoupler (c) Stepper Motor (d) All of these

(e) only (a) and (c)

4. Which of the following is true about optocouplers

(a) Optocoupler acts as an input device only

(b) Optocoupler acts as an output device only

(c) Optocoupler can be used in both input and output circuitry

(d) None of these

5. Which of the following is true about a unipolar stepper motor

(a) Contains only a single winding per stator phase

(b) Contains two windings per stator phase

(c) Contains four windings per stator phase

(d) None of these

6. Which of the following is (are) true about normally open single pole relays?

(a) The circuit remains open when the relay is not energised

(b) The circuit remains closed when the relay is energised

(c) There are two output paths

(d) Both (a) and (b) (e) None of these

7. What is the minimum number I/O line required to interface a 16-Key matrix keyboard?

(a) 16 (b) 8 (c) 4 (d) 9

8. Which is the optimal row-column confi guration for a 24 key matrix keyboard?

(a) 6 × 4 (b) 8 × 3 (c) 12 × 2 (d) 5 × 5

Computer Science

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