Selected MCQ

Current Question
Recent data from the Dark Energy Spectroscopic Instrument (DESI) suggests that dark energy:
  • A. Is constant over time
  • B. Is weakening over time
  • C. Has been proven not to exist
  • D. Is stronger than gravity
Correct Answer: B
Explanation:
DESI findings indicate dark energy's strength appears to have decreased in the last few billion years.
Related Question 1
In natural language processing, which model is specifically designed to handle sequential data by maintaining a hidden state that carries information through steps?
  • A. Convolutional Neural Network (CNN)
  • B. Recurrent Neural Network (RNN)
  • C. Support Vector Machine (SVM)
  • D. Decision Tree
Correct Answer: B
Explanation:
RNNs are designed for sequential data, with hidden states capturing information across sequence elements.
Related Question 2
What ensures blockchain data integrity across nodes?
  • A. Public database
  • B. Hash-linked blocks and consensus
  • C. Encryption keys only
  • D. Trusted server
Correct Answer: B
Explanation:
Blockchain uses cryptographic hashes linking blocks and consensus protocols to maintain integrity.
Related Question 3
Which concept involves using sensor data to create a 3D model of a city or facility?
  • A. Digital wallet
  • B. Digital twin
  • C. Virtual machine
  • D. Quantum replica
Correct Answer: B
Explanation:
Digital twins can model entire environments or systems in real-time using sensor data.
Related Question 4
Which IoT protocol operates over UDP and is designed for constrained devices?
  • A. MQTT
  • B. HTTP
  • C. CoAP
  • D. FTP
Correct Answer: C
Explanation:
CoAP (Constrained Application Protocol) is a lightweight RESTful protocol for IoT over UDP.
Related Question 5
Which type of malware encrypts a user’s data and demands payment?
  • A. Ransomware
  • B. Spyware
  • C. Adware
  • D. Rootkit
Correct Answer: A
Explanation:
Ransomware locks or encrypts data and demands payment (ransom) for the key.