Hi Badavath, A few basic points that may be asked during an interview:

1- Difference between seepage, infiltration and percolation.
2-Under-Reinforced vs Over-Reinforced sections in beam design.
3-What are some quick tests to differentiate between silt and clay in the field?
4-What advantage does an arch have over a beam?

Here's a link to the answers of these questions:

http://goo.gl/pf8udw

Hope that solves your query,
Feel free to post more queries,
Thanks & Best of Luck!!