Selected MCQ

Current Question
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.
Related Question 1
Which of the following is NOT a NoSQL database type?
  • A. Document store
  • B. Graph database
  • C. Relational table
  • D. Key-value store
Correct Answer: C
Explanation:
NoSQL includes document, graph, and key-value stores; a relational table is an SQL table.
Related Question 2
Which type of database is most suitable for handling unstructured or semi-structured data like JSON documents?
  • A. Relational (SQL)
  • B. NoSQL document store
  • C. Flat file
  • D. Spreadsheet
Correct Answer: B
Explanation:
NoSQL document databases (e.g., MongoDB) are designed to store and query unstructured data, such as JSON documents.
Related Question 3
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 4
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 5
What type of celestial object is often referred to as a "baby star" still in formation?
  • A. White dwarf
  • B. Brown dwarf
  • C. Protostar
  • D. Red giant
Correct Answer: C
Explanation:
A protostar is a very young star still forming from a collapsing gas cloud.