You might initially think that if you haven’t done a degree in finance or economics you haven’t got very much to offer an investment bank, but you’d be wrong. Any numerate discipline will have given you a mathematical toolkit that will come in useful in technical banking work, and any good degree proves that you’re intelligent, hardworking, and effective under pressure. Extra-curricular activities may have given you a wealth of other skills that are valuable at an investment bank, such as being able to juggle a number of commitments and work with others.

Payroll input includes: Monthly,Qtrly,Yearly payments,adjustements, recoveries etc.
Inputs can be received either from HR or finance or both.

Current month New joinees, resignees recovery's etc.

Yes, inputs changes company to company

A payroll journal is like a payroll register. It has salary, bonuses, commission in other words earnings, any deductions such as 401k, fsa etc, state and income taxes etc.
It shows the gross salary less any deductions "Net pay" for the period.

The Payroll source documents are the employee Time Sheets (or equivalent) that record when the employee worked and generally what they did. These records are subject to audit by the Labor Department, EEOC and probably others that I haven't encountered. These should be bound into a Payroll Source Document folder.

However, there are other employee documents that need to be retained, e.g., their original employment application, employee reviews (if you do them),that record their federal/state tax exemption choices,reporting their annual wages and withholdings, etc.

These can be filed in separate Employee files (by employee name or number) -- or simply integrated into the Payroll Source Document folders (in the week in which they occur). I very much favor the latter -- especially if you're doing computer accounting -- in keeping with my "always file chronological" bias.

For making accounting entries the accounting dept will need the total transactions of the particular payroll run grouped into various expenditure/liability/Income items like salary,loans,ees pension,ers pension,tax, PF/NI etc. This information should be employee wise & relevant cost center of the employee(in a large organisation).

Mostly payroll will have expenses/liabilities only. Few payrolls might have Income also.

To be specific to the reports bit of your question following reports are produced

1) Net pay reconciliations report
2) Deductions report comprising all voluntary and non voluntary deductions
3) Payments report
4) Costing report
5) Exceptions report
6) High pay salary report
7) No pay salary report

Contingent or temporary workers have little or no job security as their employment is based on a temporary
Contingent workers are not committed to the organization for a long run, as they know that they will be out of there in very short period of time

With the computerised payroll systems -

=>You saved a lot of your time,
=>Your accuracy and efficiency is increased by many times.
=>Your are free from small and small human mistakes in calculation and linking etc.
=>Once master data is updated(CTC,Reimbursement), rest is taken care by the systems once input is given as and when salary is processed.
=>Better control is exercised.

Variance Report is to know what is the difference between last month salary and the current month salary you can also check in that report all input which you have considered its captured or not