Same chapter3 marksDifficulty: Medium
What is a flip-flop and how does it differ from a combinational circuit?
Combinational and Sequential Logic Circuits
3 marksDifficulty: Medium
Distinguish between an SR flip-flop and a JK flip-flop.
Original Khojo Papers practice question — not from a past board paper.
Answer
In an SR flip-flop the input combination S = 1, R = 1 is forbidden because the output becomes indeterminate. The JK flip-flop removes that restriction: with J = 1 and K = 1 the output simply toggles, so every input combination is defined.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
This is why the JK flip-flop is used as the building block of counters.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is a multiplexer, and how many select lines does an 8-to-1 multiplexer need?
Combinational and Sequential Logic Circuits
Same chapter3 marksDifficulty: Medium
Draw the truth table of a half adder and state its limitation.
Combinational and Sequential Logic Circuits
Same chapter3 marksDifficulty: Medium
Distinguish between an encoder, a decoder and a multiplexer.
Combinational and Sequential Logic Circuits
Same chapter3 marksDifficulty: Medium
Draw the truth table of a full adder and state how many half adders it takes to build one.
Combinational and Sequential Logic Circuits
Same subject3 marksDifficulty: Medium
State and verify the absorption law X + X·Y = X using a truth table.
Boolean Algebra