DIGITAL ELECTRONICS-II MCQ SET-4

1. Which of the following is waveshaping circuit.

(A) Clamper
(B) Clipper
(C) Both (a) and (b)
(D) None of these

2. Schemitt trigger generates square wave from :

(A) Cosine wave i/p
(B) Sine wave i/p
(C) Triangular wave
(D) None

3. A differentiator consists of ______

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

4. A decoder has n-input lines and ______ output lines.

(A) Maximum 2ⁿ
(B) Minimum 2ⁿ
(C) Maximum n
(D) Maximum n²

5. Magnetic tapes wave used to record.

(A) Sound
(B) Video
(C) Computer Data
(D) All of the above

6. Which of the following statement is correct for monostable multivibrator .

(A) It requires one input pulse
(B) It requires two input pulse
(C) It does not requires any input pulse
(D) None of these

7. In multivibrator, transistor works in ______ region.

(A) Cut-off
(B) Active
(C) Saturation
(D) Both (a) and (c)

8. 555 timer consist of ______ comparators.

(A) Two
(B) Three
(C) Four
(D) Five

9. In which of the following memory, the contents of memory location do not change with time

(A) Static memory
(B) Dynamic memory
(C) Both (a) and (b)
(D) None of these

10. Which of the following memory is programmed.

(A) ROM
(B) PROM
(C) EPROM
(D) None of these

11. Which of the following is not a sequential memory

(A) CCD
(B) RAM
(C) Shift register
(D) All of the above

12. Which of the following is correct statement for magnetic core memory

(A) It is non-volatile memory
(B) This memory can be read only
(C) Both (a) and (b)
(D) None of these

13. Which of the following is optical storage

(A) CD-ROM
(B) RAM
(C) Shift register
(D) All of the above

14. In n-bit weighted resistor D/A converter, number of resistors required is ______

(A) n
(B) 2n
(C) n+1
(D) n-1

15. Which of the following is faster A/D converter

(A) Parallel comparator
(B) Counting type
(C) Dual slope type
(D) None of these

16. For an n-bit A/D converter, the range of analog voltage is represented in 2ⁿ intervals. This process is called ______

(A) Enconding
(B) Sampling
(C) Quantization
(D) Holding

17. The screen of CRT is coated with ______

(A) Silver
(B) Phosphor
(C) Silicon
(D) None of these

18. Diameter of basic CD-ROM is ______

(A) 120 mm
(B) 120 cm
(C) 12 mm
(D) 18 mm

19. Which of the following statement is correct for Hard disc.

(A) Information is stored on upper side of disc
(B) Information is stored on lower side of disc
(C) Information is stored on both side of disc
(D) None of these

20. Which of the following requires a capacitor to store binary data.

(A) SRAM
(B) DRAM
(C) Both (a) and (b)
(D) None of these