Electronic Payment Systems: One Mark Questions, Book Back Answers and Notes

About Electronic Payment Systems

Medium ~90 min study

When you pay a shop with a card, send money through NEFT or scan a UPI QR code, no notes change hands. The value moves as data between bank computers. That is what an electronic payment system does, and this unit looks at the main ways it is done in India today.

The chapter starts by splitting payments into two groups by value: micro payments for small amounts and macro payments for large ones. It then covers card payments (credit, debit and stored value cards), account transfers (ECS, NEFT and RTGS), digital cash and cryptocurrency, electronic wallets, UPI, and internet and mobile banking.

Book back questions from this unit usually ask about the parts of a credit card, what the first digit or the first six digits of a card number mean, which transfer system works in batches and which works in real time, and what a Virtual Payment Address hides. Read the comparisons carefully, because the options in the MCQs are often two systems that look alike.

What you'll learn

• Classify a payment as micro or macro based on its value and the level of security it needs.
• Name the parts of a credit card and explain how credit, debit and stored value cards differ.
• Compare ECS, NEFT and RTGS by purpose, speed and type of settlement.
• Explain how cryptography and the blockchain protect cryptocurrency, and how e-wallets are used.
• Describe how a UPI transfer is made using a VPA and a UPI PIN.
• Explain why a Virtual Payment Address protects account details better than sharing the account number and IFSC.

Before you start

• Basic idea of computer networks and the client-server model.
• The e-commerce business models from the earlier unit.
• What a database table is and how records are stored.

Electronic Payment Systems explained

How Electronic Payments Work

Micro and Macro Electronic Payments

Payment systems are grouped by the value of each transaction. Micro electronic payment systems handle small, frequent payments, such as a song download or a few rupees for an online game. Because each payment is small, the system uses lighter cryptography and keeps computing and communication costs low. Macro electronic payment systems handle large amounts, so they use stronger and more expensive public key cryptography to prevent fraud.

Card-Based Payments

Plastic cards are the most common cashless method. They come in three kinds. A credit card lets you buy now and pay later, up to a credit limit fixed by the issuing bank. A debit card takes the money straight from your savings or current account when the payment is authorised. A stored value card holds the money on the card itself, not in a bank account. Closed loop cards work only with one merchant or purpose, such as a metro travel card. Open loop cards, such as prepaid gift cards, can be used at many places.

Electronic Account Transfers

Banks also move money directly from one account to another. ECS (Electronic Clearing Services) is used for repeated bulk payments, for example a company paying salaries to many employees or a customer paying the same electricity bill every month. NEFT (National Electronic Funds Transfer), started by the RBI in November 2005, is a one-to-one transfer that is settled in batches, so it is not real time. RTGS (Real Time Gross Settlement) settles each transaction individually, as soon as it is made, and is meant for large amounts.

Cryptocurrency and Electronic Wallets

Digital cash is value stored as encrypted data instead of coins and notes. A cryptocurrency such as Bitcoin records every transaction on a shared, decentralised ledger called a blockchain. Public key cryptography proves who owns the coins and stops the same coin being spent twice. An electronic wallet is an app on a phone that holds pre-loaded money or links to your bank cards, so you can pay quickly at shops and websites.

Unified Payments Interface

UPI, developed by the National Payments Corporation of India (NPCI), allows instant bank-to-bank transfers from a mobile phone. Instead of sharing your account number and IFSC, you share a Virtual Payment Address (VPA) or UPI ID, such as name@bank. One UPI app can be linked to several bank accounts, and each payment is confirmed with a UPI PIN.

Internet and Mobile Banking

With internet banking you log in to your bank's website and pay bills, transfer funds or check your balance. Mobile banking does the same through the bank's app. Both are protected by a user ID and password, one-time passwords (OTP) and PINs.

Common mistakes to avoid

• Mixing up credit and debit cards. A credit card spends the bank's money, which you repay later. A debit card spends your own money from your account at once.
• Writing that NEFT is real time. NEFT settles transfers in batches (currently every half hour). RTGS and UPI are the real-time systems.
• Thinking a VPA reveals your bank details. The VPA is only an alias. The person paying you does not see your account number or IFSC.
• Calling every card number digit random. The first digit is the Major Industry Identifier, the first six digits are the Issuer Identification Number (BIN), and the last digit is a check digit.

Test yourself on these with the practice test, then check the worked reasoning in the solved MCQs.

Frequently asked questions

What is the difference between micro and macro payments?

Micro payments are small amounts, such as a music download or an in-game purchase. They use lighter security so that the cost of processing does not exceed the payment. Macro payments are large amounts and use strong public key cryptography, which costs more to compute but gives better protection against fraud.

How does a stored value card work?

Money is loaded onto the card in advance and stored on the card's chip or magnetic stripe, so no bank account is needed at the time of purchase. A closed loop card works for one purpose or merchant, like a metro travel card. An open loop card, like a prepaid gift card, can be used at many stores.

What are NEFT and RTGS and how do they differ?

Both move money between bank accounts. NEFT collects transfer requests and settles them in batches, so it suits ordinary transfers of any size. RTGS settles each transfer on its own, immediately, and is meant for large-value payments. If a question asks which one is real time, the answer is RTGS.

How does cryptocurrency keep transactions secure?

Each transaction is signed with the owner's private key and recorded on a blockchain, a ledger shared across many computers. Because everyone holds a copy, a coin cannot be spent twice without the others noticing. Only the holder of the private key can move coins out of a wallet.

What is a Virtual Payment Address in UPI?

A VPA, or UPI ID, is a simple address such as name@bank that is linked to your bank account. You give this ID to the payer instead of your account number and IFSC. The payment still reaches your account, but your bank details stay private.

What does the first digit of a credit card number tell us?

The first digit is the Major Industry Identifier (MII). It shows the type of issuer. In the textbook's examples, 1 means an airline, and 4 or 5 means a bank or financial institution. The first six digits together form the Issuer Identification Number, also called the Bank Identification Number.

What are IFSC and SWIFT codes used for?

IFSC (Indian Financial System Code) is an 11-character alphanumeric code given by the RBI to identify a bank branch for NEFT, RTGS and other domestic transfers. For transfers to or from other countries, banks use the SWIFT code to identify the bank.