Electronics (ECE) - MCQ Practice Questions

A SR flip-flop with S=0, R=0 results in:

The Gray code for decimal 5 is:

A 3-to-8 decoder has how many output lines, and what is the number of active outputs for any single input combination?

In VHDL, what does the 'rising_edge' function detect?

Which of the following is NOT a characteristic of ROM (Read-Only Memory)?

In a 16×4 RAM, what do the numbers 16 and 4 represent respectively?

What is the fundamental difference between combinational and sequential circuits?

Which of the following is a characteristic of asynchronous counters?

A BCD counter counts from 0 to 9 and then resets. How many flip-flops are minimum required?

In a multiplexer (MUX) with 3 select lines, how many input lines can it handle?

A demultiplexer (DEMUX) with 4 select lines has how many output lines?

Which type of flip-flop has the simplest truth table and is used for frequency division?

Which of the following is a volatile memory?

Which of the following is a sequential circuit?

In state machine design, if a machine has 15 different states, the minimum number of flip-flops needed is?

In a 3-to-8 decoder, if the binary input is 101, which output line will be activated?

Which of the following logic gates has an output of 1 only when both inputs are different?

What is the Boolean expression for a 2-input NAND gate?

In a Multiplexer (MUX), how many select lines are required for an 8:1 MUX?

What is the primary purpose of using parity bits in error detection?