During the recess, the Departmentally Related Standing Committees of Parliament examine the Demand for Grants submitted by various Ministries.  The Demand for Grants are detailed explanations of that Ministry's annual budget which form part of the total budget of the government.  These are examined in detail, and the committees can approve of the demands, or suggest changes.  The Demand for Grants are finally discussed and voted on by the Parliament after the recess.  (The post below lists the ministries whose Demand for Grants will be discussed in detail after the recess). The issue is - how effective is the institution of Parliament in examining the budget?  Though India specific information on this subject is hard to find, K. Barraclough and B. Dorotinsky have cited the World Bank - OECD Budget procedures Database to formulate a table on the legislature approving the budget presented by the executive ("The Role of the Legislature in the Budget Process: A Comparative Review", Legislative Oversight and Budgeting).  I reproduce the table below:

In Practice, does the legislature generally approve the budget as presented by the Executive? (in percent)
Answer All Countries OECD Countries Presidential democracies Parliamentary democracies
It generally approves the budget with no changes 34 33 14 41
Minor changes are made (affecting less than 3% of total spending) 63 67 71 59
Major changes are made (affecting more than 3% but less than 20% of total spending) 2 0 7 0
The budget approved is significantly different (affecting more than 20% of total spending) 0 0 0 0
Sources:  K. Barraclough and B. Dorotinsky; PRS.

The convention for passing Bills in the Parliament is by orally communicating agreement or disagreement with the proposed motion (whether a Bill should be passed or not, for example). When a motion is put to vote the speaker says, 'Those in the favour of the motion say Aye and those opposing it say No.' According to the voice vote, the Speaker decides whether the Bill is accepted or negated by the House. If a member is not happy with a voice vote, it can be challenged and a division can be asked for. The procedure for division entails the Speaker to announce for the lobbies of Parliament to be cleared. Then the division bell rings continuously for three and a half minutes and so do many connected bells all through Parliament House and Parliament House Annexe. MPs come from all sides into the chamber and the doors are closed. The votes are recorded by the Automatic Vote Recording Equipment. For example, in the Winter Session of the Parliament, four appropriation bills (financial Bills) were passed by voice vote amidst the interruptions from the opposition and two bills i.e. The Orissa (Alteration of Name) Bill, 2010 and The Constitution (One Hundred and Thirteenth Amendment) Bill, 2010 (Amendment of Eighth Schedule) were passed through division. For these Bills the voting took place together. The votes recorded were: 298 ayes and 0 noes.