Sentence: Bihabha has had post graduation degree from India.

[Sonia*]

I have had a bad cold for last two days.
we have had first round.
Bihabha has had post graduation degree from India. :?: :?: :?:

please let me know which tense is this. what does the combination of

"Has/have + had suggests". :?:
please illustrate full well with some wonderfull instances.

please reply soon.
:D sonia*

thanks a lot teacher.

[Mister Micawber]

It is difficult to be sure what you don't understand, because you have made several errors. It should read:

"I have had a bad cold for the last two days.
We have had the first round. (I don't know what you mean here by 'round', but I will accept the statement.)
Bihabha has received his postgraduate degree in India.

Please let me know which tense is this. What does the combination of "Has/have + had" suggest? Please illustrate fully with some examples."

'Had' here (like 'received') is the past participle of the verb 'have', and it performs just like any other past participle with 'have/has/had' to form the present perfect and past perfect verb aspects:

Have/has/had gone
Have/has/had received
Have/has/had had.

There is also future perfect: 'will have gone/received/had'. The uses of the perfect aspects are too broad to examine here, but you can start by reading HERE and HERE.
_________________
Native English teacher at Mister Micawber's

[Sonia*]

Hello Mister Micawber,

Many thanks to you sir, I have got your point. Now I have got a little understanding how to use the present perfect tense now I need practice. Thanks a lot sir for providing me the web site for practice.I am happy that you evaluated my writing skills also. Now I guessed where I am mistaking.

Thanks a million sir.
sonia*

[Mister Micawber]

My pleasure, Sonia.
_________________
Native English teacher at Mister Micawber's