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MCQ Practice

Technological Knowledge MCQs

Which of the following is an emerging tech for generating realistic human images and voices?

  • A. Blockchain
  • B. Generative AI (GANs)
  • C. Quantum computing
  • D. Fiber optics
Explanation:
Generative AI models like GANs can create realistic synthetic images, audio, and text.

What is a 'digital twin' used for?

  • A. A backup of a database
  • B. A virtual model of a physical system for simulation
  • C. An identical computer router
  • D. Digital photography editing
Explanation:
A digital twin is a software model that simulates a physical object or system.

Which of the following is an example of Augmented Reality (AR)?

  • A. Oculus VR headset
  • B. Pokemon Go app overlaying images on camera view
  • C. Watching 3D movies
  • D. Using a fitness tracker
Explanation:
Pokémon Go overlays game images onto the real world through a phone camera (AR).

What is the key benefit of virtualization in cloud computing?

  • A. Reduced internet speed
  • B. Isolation of applications in secure environments
  • C. Human-driven networking
  • D. No changes needed
Explanation:
Virtualization isolates and encapsulates applications in virtual machines or containers.

What distinguishes 5G from previous cellular generations?

  • A. Lower latency and higher bandwidth
  • B. Use of copper lines
  • C. No need for antennas
  • D. Shorter battery life
Explanation:
5G provides much higher speeds and significantly lower latency compared to 4G.

In IoT, what is MQTT primarily used for?

  • A. Hardware design
  • B. Lightweight messaging protocol
  • C. Database management
  • D. Encryption standard
Explanation:
MQTT is a lightweight publish/subscribe messaging protocol widely used in IoT.

What is the main idea of edge AI?

  • A. AI on mobile robots
  • B. Using AI algorithms directly on edge devices (e.g. cameras)
  • C. AI only in the cloud
  • D. AI in graphics cards
Explanation:
Edge AI runs AI inference on devices near data sources, reducing latency and bandwidth usage.

Which technology helps secure communications using quantum mechanics?

  • A. Quantum key distribution (QKD)
  • B. Standard VPN
  • C. Hashing
  • D. WPA2
Explanation:
QKD uses quantum particles to securely share encryption keys, with eavesdropping detectable.

How many states can a qubit theoretically exist in at once?

  • A. 2
  • B. Many via superposition
  • C. 1
  • D. Infinite
Explanation:
A qubit can exist in a superposition of states, effectively representing multiple values simultaneously.

Which of these is a quantum phenomenon not present in classical bits?

  • A. Voltage
  • B. Entanglement
  • C. Resistance
  • D. Capacitance
Explanation:
Quantum entanglement allows qubits to be correlated in ways impossible for classical bits.