Electronics (ECE) - MCQ Practice Questions

Which of the following is NOT a basic logic gate?

The output of a NAND gate is 0 when:

How many 2-input NAND gates are required to implement a 2-input AND gate?

The decimal equivalent of binary number 10110.101 is:

In Gray code, consecutive numbers differ by:

A multiplexer with 8 inputs requires how many select lines?

The BCD equivalent of decimal 47 is:

A full adder has how many inputs and outputs?

A JK flip-flop with J=1, K=1 performs:

In a 4-bit ripple counter using negative edge-triggered flip-flops, if the input frequency is 16 MHz, what is the frequency at the output of the third flip-flop?

Which logic gate produces HIGH output only when both inputs are different?

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?