Flip flop questions

2 questions on Flip flop from real job recruitment exams, newest first.

Questions

What is a Multiplexer? Differentiate between D Latch and D Flip-Flop. — BCIC February 2025 – Written (BUET)
A traffic signal cycles from RED to YELLOW, YELLOW to GREEN and GREEN to RED. In each cycle, RED is turned on for 100 seconds, YELLOW is… — PetroBangla June 2024 – Written (BUET)