Previous Year Question
Given the following statements:Statement 1:A latch has one stable state.Statement 2:A latch is considered to be in the RESET state when the Q output is low.Choose the correct option for the above statements
Correct answer: C
Explanation
A latch is bistable, meaning it has two stable states, so statement 1 is false. In the RESET state its normal output Q is LOW (0), so statement 2 is true. Therefore option C is correct.
Formula
SET: Q=1; RESET: Q=0
Step-by-step solution
Correct Answer
C — Statement 1 is false, but statement 2 is true
Concept and Reasoning
A latch is bistable, meaning it has two stable states, so statement 1 is false. In the RESET state its normal output Q is LOW (0), so statement 2 is true. Therefore option C is correct.
Calculation / Key Relation
SET: Q=1
RESET: Q=0
Exam Takeaway
Latch = bistable one-bit memory.
Common Mistake
Do not describe an ordinary latch as having only one stable state.
Common mistake
Do not describe an ordinary latch as having only one stable state.
Exam tip
Latch = bistable one-bit memory.
Quick method
Latch = bistable one-bit memory.