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MCQ Practice

Technological Knowledge MCQs

What does 'AIoT' stand for?

  • A. Artificial Intelligence of Things
  • B. Automated Internet of Things
  • C. Advanced IoT
  • D. None of the above
Explanation:
AIoT combines artificial intelligence (AI) and the Internet of Things (IoT) to enable smarter devices.

Which technology is used for secure, short-range wireless communication in IoT devices?

  • A. Wi-Fi
  • B. Bluetooth Low Energy (BLE)
  • C. Ethernet
  • D. 4G LTE
Explanation:
Bluetooth Low Energy is a wireless protocol for low-power short-range communication.

What is a major challenge in large-scale quantum computing today?

  • A. Lack of electricity
  • B. Qubit decoherence and error rates
  • C. Too much classical memory
  • D. No known algorithms
Explanation:
Keeping qubits coherent and reducing errors are key challenges in building large quantum computers.

Which cryptocurrency uses a blockchain but was the first to implement smart contracts?

  • A. Bitcoin
  • B. Ethereum
  • C. Litecoin
  • D. Ripple
Explanation:
Ethereum introduced smart contracts on the blockchain.

What does 'fog computing' refer to?

  • A. Computing at centralized cloud servers
  • B. Extending cloud services to the network edge
  • C. A type of fog
  • D. Removing latency entirely
Explanation:
Fog computing distributes computing, storage, and communication services closer to edge devices.

What is the main goal of blockchain's consensus mechanism?

  • A. To ensure every node has the same data
  • B. To shuffle tokens quickly
  • C. To encrypt all data
  • D. To generate a random number
Explanation:
Consensus mechanisms such as PoW/PoS ensure that all nodes agree on a single history of transactions.

What is a key feature of quantum computing that can offer speedups?

  • A. Using vacuum tubes
  • B. Superposition and entanglement
  • C. Fiber optic circuits
  • D. DC power only
Explanation:
Quantum superposition and entanglement enable parallelism that can speed up tasks like factoring.

Which IoT protocol operates over UDP and is designed for constrained devices?

  • A. MQTT
  • B. HTTP
  • C. CoAP
  • D. FTP
Explanation:
CoAP (Constrained Application Protocol) is a lightweight RESTful protocol for IoT over UDP.

What does SDN (Software Defined Networking) allow?

  • A. Hardware-only management
  • B. Dynamic network configuration via software control
  • C. Eliminating routers
  • D. Only static routing
Explanation:
SDN separates control and data planes, enabling programmable network configurations.

What is a 'token' in blockchain context?

  • A. A physical key
  • B. A digital asset representing value or rights
  • C. A password
  • D. VPN software
Explanation:
In blockchain, a token is a digital unit of value or access rights recorded on the ledger.