Question 1

What is the difference between a normal web app and a dApp?

Accepted Answer

A normal web app relies on a centralized database and server owned by a single company. A dApp utilizes decentralized smart contracts on a blockchain as its backend, meaning data is immutable, public, and not controlled by any single entity.

Question 2

Do users need cryptocurrency to use a dApp?

Accepted Answer

Traditionally, yes, users need a Web3 wallet (like MetaMask) and crypto to pay network 'gas' fees. However, we can implement meta-transactions and Account Abstraction to subsidize these fees, providing a gasless experience for your users.

Question 3

How much does it cost to build a dApp?

Accepted Answer

Costs are driven mostly by smart contract complexity and the mandatory security audit, since a flaw can mean irreversible loss of funds. A simple dApp with one or two contracts plus a web front end is moderate, while DeFi-grade logic with audits runs significantly higher.

Question 4

Who pays the gas fees when users interact with the dApp?

Accepted Answer

By default the user pays gas from their own wallet for each transaction, but we can implement meta-transactions or account abstraction so your business sponsors fees for a smoother experience. Choosing a low-fee chain like Polygon or an L2 also keeps user costs minimal.

Question 5

Can you change a dApp after it is deployed?

Accepted Answer

The front end and off-chain parts update freely, but smart contracts are immutable once deployed. We plan for this using upgradeable proxy patterns where appropriate, so critical logic can be patched, while being transparent that immutability is often a feature users trust.

Question 6

Which blockchain should we build our dApp on?

Accepted Answer

Ethereum offers the deepest ecosystem and security but higher fees, while L2s like Arbitrum and chains like Polygon or Solana trade some decentralization for speed and low cost. We recommend based on your users, transaction volume, and whether you need composability with existing DeFi protocols.

Question 7

How do you store large files like images for a dApp?

Accepted Answer

Storing large data on-chain is prohibitively expensive, so we put files on decentralized storage like IPFS or Arweave and keep only the content hash on-chain. This keeps the asset tamper-proof and verifiable without paying for every byte in gas.

Question 8

How do you handle security and audits for a dApp?

Accepted Answer

We follow secure coding patterns, write extensive automated tests, and for any contract holding value we arrange a third-party audit before mainnet launch. Because exploits are public and permanent, we treat security as the central cost of the project rather than an optional extra.

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