arijusg / loanhero

LoanHero - P2P loan quote calculator

There is a need for a rate calculation system allowing prospective borrowers to obtain a quote from our pool of lenders for 36 month loans. This system will take the form of a command-line application.

You will be provided with a file containing a list of all the offers being made by the lenders within the system in CSV format, see the example market.csv file provided alongside this specification.

You should strive to provide as low a rate to the borrower as is possible to ensure that LoanHero's quotes are as competitive as they can be against our competitors'. You should also provide the borrower with the details of the monthly repayment amount and the total repayment amount.

Repayment amounts should be displayed to 2 decimal places and the rate of the loan should be displayed to one decimal place.

Borrowers should be able to request a loan of any £100 increment between £1000 and £15000 inclusive. If the market does not have sufficient offers from lenders to satisfy the loan then the system should inform the borrower that it is not possible to provide a quote at that time.

The application should take arguments in the form:

cmd> [application] [market_file] [loan_amount]

Example:

cmd> quote.exe market.csv 1500

The application should produce output in the form:

cmd> [application] [market_file] [loan_amount]
Requested amount: £XXXX
Rate: X.X%
Monthly repayment: £XXXX.XX
Total repayment: £XXXX.XX

Example:

cmd> quote.exe market.csv 1000
Requested amount: £1000
Rate: 7.0%
Monthly repayment: £30.78
Total repayment: £1108.10

Sample market.csv data:

Lender,Rate,Available
Bob,0.075,640
Jane,0.069,480
Fred,0.071,520
Mary,0.104,170
John,0.081,320
Dave,0.074,140
Angela,0.071,60

Remarks

• We do not mind what language you chose for your implementation
• The monthly and total repayment should use monthly compounding interest
• We will review your code and run it against some other test cases to see how it handles them