NPCBL Engineer (Cyber Security) July 2026 – Written question & solution

Questions from the NPCBL Engineer (Cyber Security) recruitment exam, July 2026 – Written, shared by the candidates who sat it. The paper: 15 written questions. So far 15 written questions have been shared. Topics include Network Security, Computer Networks, Emerging Technology, Bangla and Computer Basics.

Written (15)

  1. What is the CIA Triad? Explain its three components.
  2. What is a Man-in-the-Middle (MITM) Attack?
  3. What is ARP Spoofing (ARP Poisoning)? How does it work?
  4. What is Cloud Computing? Mention its advantages.
  5. Why is Packet Switching better?
  6. How do you use Intrusion Detection System (IDS) in NPCBL Cybersecurity?
  7. Differentiate between DoS and DDoS attacks.
  8. Compare Wi-Fi, Bluetooth, and WiMAX.
  9. Compare IPv4 and IPv6. How is IPv6 more secure?
  10. What is Subnetting? 192.169.0.1/24 Valid usable IP?
  11. Compare Encryption, Hashing, and Digital Signature.
  12. Translate into Bangla: "Cybersecurity prevents information systems from unauthorized access."
  13. Full form: OTP, VPN
  14. What is the Cyber Security Act of Bangladesh? State its main objectives.
  15. Will Artificial Intelligence (AI) replace jobs? Explain your opinion with reasons.