DIGITAL ELECTRONICS-II MCQ SET-6

1. The 555 Timer IC is an _____ pin mini dual inline package.

(A) 1
(B) 2
(C) 4
(D) 8

2. The multivibrator circuit which processes one stable state and one quasi-stable is :

(A) Astable
(B) Bistable
(C) Monostable
(D) None of the above

3. Which of the following circuits is used for converting a sine wave into a square wave ?

(A) Schmitt trigger
(B) Monostable multivibrator
(C) Both (a) and (b)
(D) None of the above

4. An intergator consist of _____

(A) Resistor
(B) OP-AMP
(C) Capacitor
(D) All of the above

5. Quantization error occurs in :

(A) D/A converter
(B) A/D converter
(C) Both (a) and (b)
(D) None of the above

6. Which of the following memories has the highest storage capacity ?

(A) Magnetic Disk
(B) Semiconductor memory
(C) Ferrite core
(D) None of the above

7. Which of the following is used for erasing purpose only ?

(A) RAM
(B) ROM
(C) EEPROM
(D) None of the above

8. SIPO stands for

(A) Series in parallel out
(B) Serial in parallel out
(C) Serial in plane out
(D) None of the above

9. Which of the following is not a sequential memory ?

(A) CCD
(B) Magnetic tape
(C) RAM
(D) All of the above

10. How many select lines would be required for an 8:1 multiplexer ?

(A) 2
(B) 4
(C) 8
(D) 3

11. IC 74150 is :

(A) A 16 to 1 line multiplexer
(B) A 8 to 1 line multiplexer
(C) A 2 to 4 line decoder
(D) None of the above

12. Data distributors are same as :

(A) Decoders
(B) De-multiplexer
(C) Multiplexer
(D) Encoders

13. CRT stands for

(A) Cathode Random Tube
(B) Cathode Ray Tube
(C) Cathode Ray Tunnel
(D) None of the above

14. Parallel type is an example of _____

(A) D/A converter
(B) A/D converter
(C) Both (a) and (b)
(D) None of the above

15. Binary number (10110)₂ equals to (?)₁₀

(A) 32
(B) 64
(C) 14
(D) 22

16. Function of weighted Register is to convert

(A) Analog signal into a digital signal
(B) Digital signal into an analog signal
(C) Both (a) and (b)
(D) None of the above

17. Which technology is used in compact disks?

(A) Laser
(B) Electrical
(C) Mechanical
(D) None of the above

18. 1 GB is equal to :

(A) 1250 MB
(B) 1296 MB
(C) 1024 MB
(D) 1600 MB

19. Which of the following Consumes less power ?

(A) Fluorescent lamp
(B) LCD
(C) LED
(D) None of the above

20. LED stands for :

(A) Light emitting diode
(B) Liquid emitting diode
(C) Light emitting device
(D) None of the above