Hello kishore, 

I guess you are talking about government bank exam preparation in Tamil nadu. Still since your question is not clear I will give you a general answer. 

Bank exams are conducted every year for which large number of vacancies are also published.

These exams are being conducted for both clerk level and Bank po level. 

Few of the Bank exams are 

Sbi clerk /po

Ibps clerk /po

Rrb clerk/po

Financial bodies also conducts there exams like 

RBI GRADE B 

NABARD GRADE A, B

IRDAI GRADE B

SEBI GRADE B

EXIM BANK

LIC AAO

NICL AAO

These are few of the prestigious bank exam every bank exam aspirant targets for. 

A decent salary, work life balance, stability are few parameters which make these exams attractive.

Now you should know that there are no such things as government bank. Its basically PSB'S public sector banks in which more than 51 percent of the shares are held by the government. So iam sure you are talking about PSB'S. 

In order to appear for this exam you should check all eligibility criteria of age, educational qualifications etc. 

There are many online and offline courses for students to prepare them for bank exams. 

You should definitely join one of such classes. You can join either online or offline it does not matter much. Just make sure to join the right classes for your preparation. 

Since the exam is online it's good if you solve question online also as it will make you have a better practise. 

You can get several coaching class in Tamil nadu.

Some of the coaching classes for the exam preparation ate -

Adda247

Mahendra guru 

Ims 

Edutap 

Anuj jindal 

Career launcher 

So join the course as per the convince. 

If you are doing some job and don't have time to go to classes you can join online classes however if you want to have a dedicated learning class you can go to classes.

I hope the information provided by me is helpful to you.