Combined Bank Senior Officer October 2026 – Written question & solution

Questions from the Combined Bank Senior Officer recruitment exam, October 2026 – Written, shared by the candidates who sat it. The paper: 19 written questions. So far 19 written questions have been shared. Topics include Computer Networks, Network Security, Bangla, English and General Knowledge.

Written (19)

  1. Focus writing in Bangla: তথ্য প্রযুক্তির যথাযথ ব্যবহারে সচেতনতা বৃদ্ধিতে করণীয়
  2. Focus writing in English: Data security challenges in banks and protection guidelines
  3. Write only the correct answers. A. How many basic pillars does the Constitution of Bangladesh have? B. Which agreement led to an end of…
  4. State the main purpose of Spanning Tree Protocol (STP) in Ethernet networks. Explain how switching loops occur in a network. Briefly…
  5. Explain the main differences between IPv4 and IPv6 addressing. Include at least three key differences and state the IPv6 equivalent of ARP.
  6. Explain the role of Link-State Advertisements (LSAs) in OSPF and how the Dijkstra SPF algorithm uses the information contained in LSAs to…
  7. What is Dynamic ARP Inspection (DAI)? How does it detect and prevent ARP spoofing attacks? Explain how Dynamic ARP Inspection (DAI) uses…
  8. Using VLSM, subnet the block 10.100.0.0/22 to allocate address space for the following departments. Write the Subnet Address and CIDR mask…
  9. List the top five steps of the BGP path-selection decision process in priority order (highest priority first). Briefly describe how each…
  10. Explain how Port Address Translation (PAT) works and why it is more commonly used than Static or Dynamic NAT in most enterprise and home…
  11. What is network topology? Explain the different network topologies.
  12. Draw and explain the seven layers of the OSI model.
  13. Differentiate between a firewall, an Intrusion Detection System (IDS), and an Intrusion Prevention System (IPS), and explain how each…
  14. Divide the network 192.168.10.0/24 into four equal-sized subnets and determine the network address, subnet mask, usable host range, and…
  15. A computer can ping 8.8.8.8 but cannot access websites using domain names. Explain the likely cause and describe how you would diagnose…
  16. Explain how a Man-in-the-Middle (MitM) attack can compromise a customer's online banking session and describe technologies to mitigate the…
  17. Several computers in a bank branch become encrypted by ransomware. Describe the immediate actions the IT team should take in chronological…
  18. Consider Employees (EmpID, Name, Department, Salary). Write an SQL query to retrieve employees whose salaries are greater than the average…
  19. Explain the meaning of chmod 750 backup.sh and chown root:admin backup.sh. Write a command to grant the owner read/write/execute…

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