Combined Bank Senior Officer October 2025 – Written question & solution

Questions from the Combined Bank Senior Officer recruitment exam, October 2025 – Written, shared by the candidates who sat it. So far 30 MCQs and 20 written questions have been shared. Topics include Computer Architecture, English, Computer Networks, Coding and Algorithm.

MCQ (30)

  1. When the hexadecimal value ABCD in a 32-bit register is logically shifted right by two bits, which of the following is the resulting value…
    1. a) 2AF3
    2. c) AF34
    3. b) 6AF3
    4. d) EAF3
  2. Which of the following is a variable-length, letter-and-number error-detection method where, on the sender side, the data is appended with…
    1. a) CRC
    2. c) Horizontal parity check
    3. b) Hamming code
    4. d) Vertical parity check
  3. Which of the following is the RAID configuration for achieving the highest-speed disk access at the cost of reliability?
    1. a) RAID 0
    2. c) RAID 5
    3. b) RAID 1
    4. d) RAID 6
  4. In a CPU, which of the following is a special register that contains the address of the next instruction to be fetched?
    1. a) Accumulator
    2. b) Instruction register
    3. c) Index register
    4. d) Program counter
  5. Which of the following is an appropriate CPU operation associated with cache memory?
    1. a) When a cache hit occurs, the CPU fetches data from ROM.
    2. b) When a cache hit occurs, the CPU fetches data from main memory.
    3. c) When a cache miss occurs, the CPU fetches data from cache memory.
    4. d) When a cache miss occurs, the CPU fetches data from main memory.
  6. For two 8-bit signed integers A and B in 2's complement format, which of the following will cause an overflow when A and B are added?
    1. a) 0111 1111 and 1111 1110
    2. c) 1000 0000 and 0111 0000
    3. b) 0111 1111 and 0111 1110
    4. d) 1111 1111 and 1111 1111
  7. The following postfix expression is evaluated where A = 4, B = 3, C = 5, and D = 6. What is its result? A B 2 × + D B ÷ C × -
    1. a) -3
    2. b) 0
    3. c) 14
    4. d) 403
  8. Which of the following statements about SRAM and DRAM is correct?
    1. a) SRAM consumes less power than DRAM while idle
    2. b) SRAM requires fewer transistors per bit than DRAM
    3. c) SRAM does not need refreshing while DRAM does
    4. d) SRAM stores data in capacitors while DRAM uses flip-flops
  9. Which of the following RAID levels allow data recovery if one disk fails?
    1. a) RAID 0
    2. b) RAID 5
    3. c) RAID 1
    4. d) RAID 6
  10. Which of the following is a computer architecture where multiple instruction stages execute in parallel by slightly offsetting the…
    1. a) Harvard Architecture
    2. b) Pipeline
    3. c) VLIW
    4. d) Von Neumann Architecture
  11. Which of the following is the octal equivalent of the hexadecimal number 7B5?
    1. a) 735
    2. b) 7551
    3. c) 3665
    4. d) 7561
  12. For a non-negative integer x, which of the following operations gives the remainder after division of x by 8?
    1. a) Bitwise AND with 7
    2. b) Bitwise AND with 8
    3. c) Bitwise OR with 8
    4. d) Right shift by 3 bits
  13. When sorting an array using randomized quicksort (pivot chosen randomly), what are its average-case and worst-case time complexities?
    1. a) O(n log n), O(n)
    2. b) O(n²), O(n log n)
    3. c) O(n log n), O(n²)
    4. d) O(log n), O(n log n)
  14. What is the primary function of a Repeater in a computer network?
    1. a) To filter network traffic and manage bandwidth
    2. b) To route data packets between different networks based on IP addresses
    3. c) To regenerate weakened signals to extend the physical range of the network
    4. d) To connect networks with different architectures or protocols
  15. Which of the following correctly describes RAID 5?
    1. a) Bit-level striping with a dedicated parity disk
    2. b) Block-level striping with a dedicated parity disk
    3. c) Block-level striping with distributed parity disks
    4. d) Mirroring without parity
  16. Which search algorithm expands all nodes at a given depth before moving deeper?
    1. a) DFS
    2. b) BFS
    3. c) Hill climbing
    4. d) A*
  17. The main drawback of hill climbing is:
    1. a) High memory requirement
    2. b) Can get stuck in local optima
    3. c) Expands all nodes
    4. d) Requires heuristic functions
  18. Which of the following is used to restrict access to certain details of an object in OOP?
    1. a) Inheritance
    2. b) Polymorphism
    3. c) Abstraction
    4. d) Encapsulation
  19. Which device operates at Layer 2 of OSI?
    1. a) Router
    2. b) Switch
    3. c) Hub
    4. d) Modem
  20. A transaction that leaves the database in an inconsistent state if partially executed violates:
    1. a) Atomicity
    2. b) Consistency
    3. c) Isolation
    4. d) Durability
  21. Which of the following is not a linear data structure?
    1. a) Queue
    2. b) Stack
    3. c) Tree
    4. d) Linked List
  22. Which OS concept allows multiple processes to run simultaneously?
    1. a) Multithreading
    2. b) Multiprocessing
    3. c) Multilevel Queue
    4. d) Time slicing
  23. Convert: (123.4) = (?)₁₆
    1. a) (7B.4)₁₆
    2. b) (7B.6)₁₆
    3. c) (123.6)₁₆
    4. d) (7C.6)₁₆
  24. If x=2 and y=3, what is the value of 2x²+3y²?
    1. a) 25
    2. b) 30
    3. c) 35
    4. d) 40
  25. The correct synonym of "Eminent":
    1. a) Obscure
    2. b) Famous
    3. c) Unknown
    4. d) Ordinary
  26. Fill in the blank: "He arrived ___ the station at 9AM."
    1. a) at
    2. b) on
    3. c) in
    4. d) by
  27. Identify the error: "She can sings very well."
    1. a) can
    2. b) sings
    3. c) very
    4. d) well
  28. Choose the correct antonym of "Benevolent":
    1. a) Kind
    2. b) Malevolent
    3. c) Generous
    4. d) Friendly
  29. "অতি" এর বিপরীত শব্দ কোনটি?
    1. a) বেশি
    2. b) কম
    3. c) অতিরিক্ত
    4. d) প্রচুর
  30. বাংলা সাহিত্যের জনক কে?
    1. a) রবীন্দ্রনাথ ঠাকুর
    2. b) মাইকেল মধুসূদন দত্ত
    3. c) বঙ্কিমচন্দ্র চট্টোপাধ্যায়
    4. d) কাজী নজরুল ইসলাম

Written (20)

  1. Focus Writing in Bangla বাংলাদেশের ব্যাংকিং খাতে কৃত্রিম বুদ্ধিমত্তার প্রয়োগ কীভাবে কার্যক্রমের দক্ষতা ও নিরাপত্তা বৃদ্ধি করতে পারে? একই…
  2. Focus Writing in English Why are data privacy and regulatory compliance (such as AML, KYC, and international data-protection standards)…
  3. Translation : Bangla to English বাংলাদেশের তরুণ জনগোষ্ঠীর একটি বড় অংশ বর্তমানে শিক্ষা, কর্মসংস্থান বা প্রশিক্ষণ-এই তিনটির কোনো ক্ষেত্রেই…
  4. Translation : English to Bangla The ongoing war in Gaza has created a serious humanitarian crisis. Continuous bombing and fighting have…
  5. Evaluate the challenges and prospects of managing the Rohingya refugee crisis in Bangladesh. How important is international cooperation…
  6. Determine whether the following pair of graphs are isomorphic, and justify your answer in one sentence. Pair 1 Graph G1: (Figure 1) Graph…
  7. Explain the Quick Sort algorithm with a suitable example. Under what conditions does Quick Sort exhibit its worst-case time complexity…
  8. Consider a logical address space of 512 pages, each of 2-KB page size, mapped onto a physical memory containing 128 frames. a. How many…
  9. Why does the Domain Name System (DNS) primarily use UDP as its transport layer protocol instead of TCP? Describe the sequence of events…
  10. Explain the concept of thrashing in an operating system, describing how it occurs in a demand-paged virtual memory system and how it…
  11. Write a structured program (in C or Python) that takes an integer input n and prints the sum of all even numbers from 1 to n.
  12. Write a program using any object-oriented language (e.g., C++ / Java / Python) to represent a Bank Account. Your program should include: A…
  13. Explain the difference between direct, immediate, and register addressing modes in the 8086 microprocessor.
  14. Consider the following relation: Sales(sales_id, salesman, region, sale_amount, sale_date) Write an SQL query to display the region…
  15. Explain the concept of ACID properties in a database transaction. Describe how each property-Atomicity, Consistency, Isolation, and…
  16. What are SOAP and RESTful APIs in web services? State one main difference between SOAP and REST in terms of how they exchange data.
  17. Explain the concepts of Reinforcement Learning (RL), Deep Learning (DL), and Federated Learning (FL) in the context of Machine Learning…
  18. Imagine a government agency is developing an AI-based citizen service chatbot that can automatically generate responses, summarize…
  19. Describe how the principles of Confidentiality, Integrity, and Availability work together to protect organizational data, and provide one…
  20. A banking application requires users to enter a 4-digit PIN for login. Explain how you would test this input field to ensure that it…

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