m_kavith,
if you good enough in PCB design then you will never ask this question to others.... Because all the jobs has its lower & upper stages... You can not get decent job in PCB designing without the basic electronics hardware knowledge. Perfect hardware designer can do better PCB designing, so you need to know the components & signal behaviors...
If you want to get good job in PCB designing environment... my advises... because i am also a PCB designer...
1.Select a perfect tool for PCB design. If you looking for job, select one of this... Allegro, altium, mentor graphics PADS.(I am using Altium its very simple & featured software)
2. Hardware knowledge.
3. knowledge of signals & noises...
4. Do & Don't... (You may get this via experience or lot of study materials available at internet)
5. Training...really Lot of training....
Best wishes...
Udhay