Digital Electronics MCQs Quizlet Bank
1. Which type of conversion, most demultiplexers facilitate?
A. Single input, multiple outputs
B. Decimal-to-hexadecimal
C. Odd parity to even parity
D. AC to DC
2. How many select lines are requiredIn, in 1-to-4 demultiplexer?
A. 4
B. 2
C. 6
D. 9
3. For the implementation of 1-to-16 DEMUX, Which of the following IC is used?
A. IC 74139
B. IC 74138
C. IC 74154
D. IC 74155
4. One transistor and one capacitor as a basic memory unit, Which of the following memory unit is?
A. DRAM
B. SRAM
C. None of these
D. Both A & B
5. Mention that which of the following number system has a base of 16?
A. Decimal
B. Hexadecimal
C. Octal
D. None
6. What latch is ________ sensitive…
A. level
B. edge
C. both level and edge
D. None
7. _______ number of bits are required to store one BCD digit.
A. 8
B. 4
C. 2
D. 3
8. Which of the following sets of logic gates are designated as universal gates..?
A. NOR, NAND
B. OR, NOT
C. XOR, NOR
D. NOR, NAND
E. None of these
9. A D-flip-flop is said to be transparent when
A. the output follows a clock
B. the output follows an input
C. the output is LOW
D. the output is HIGH
10. What is the base of digital electronics in a numbering system?
A. Binary
B. Hexadecimal
C. Decimal
D. Octal
E. None
11. Which of the following symbols represent the digit in the binary system?
A. 0,1,2
B. 0 to 8
C. 0,1
D. 1,2
12. Which one of the following is a widely used alphanumeric code for computer input and output?
A. Parity
B. Gray
C. EBCDIC
D. ASCII