Sonali & Development Bank Ltd. — Senior Officer (IT) — Written Exam: 2020 (DU) | প্রশ্ন ও সমাধান

Written question 1Data Structures

Explain Binary Search Tree operation.

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Written question 2Networking

What is the function of GGSN?

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Written question 3Software Engineering

Explain Debugging approach technique.

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Written question 4Cyber Security

Explain sniffing and spoofing.

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Written question 5Database

When does a deadlock occur and how do you prevent it, in a database?

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Written question 6Programming

Write a C program to check Armstrong Number.

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Written question 7Algorithms

Linear search (Searching algorithm) which is used to find whether a given number is present in an array and if it is present then at what location it occurs. (Using any programming language).

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Written question 8Computer Architecture

How can improve the performance of computer in memory?

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Written question 9Digital Logic

Explain how to convert half adder to full adder?

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Written question 10Networking

What is the function of ARP in TCP / IP?

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Written question 11General ICT

Ergonomics is a study of characteristics of iteration. How to measure quality of sitting good chair (ergonomics)?

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Written question 12Computer Architecture

Explain homogeneous and heterogeneous multicore processor.

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Written question 13Computer Architecture

What is page and block? Draw simple block diagram of SSD, page and block.

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Written question 14Software Engineering

Explain the factor of project complexity/factors of complexity.

Model answer

A software project's complexity comes from more than just its size — several distinct factors combine to make delivery harder to plan and estimate:

Inherent (technical) complexity: The intrinsic difficulty of the problem domain/algorithms/technology itself, independent of how it is managed.
Uncertainty: Unclear or evolving requirements, unknown technology risk, or unpredictable external dependencies increase planning difficulty.
Number of technologies involved: More languages, platforms, frameworks, and integrations multiply coordination and compatibility effort.
Rigidity of sequence (task dependencies): Highly sequential/dependent tasks (little parallelizability) reduce scheduling flexibility and increase schedule risk.
Overlap of phases (concurrency): Running phases concurrently (e.g., design starting before requirements freeze) speeds delivery but raises rework and coordination risk.
Organizational complexity: Number of stakeholders, teams, geographic distribution, and communication overhead across the organization.

graph TD
  P[Project Complexity] --> A[Inherent/Technical Difficulty]
  P --> B[Uncertainty]
  P --> C[Number of Technologies]
  P --> D[Task Sequence Rigidity]
  P --> E[Phase Overlap/Concurrency]
  P --> F[Organizational Complexity]

Exam takeaway: Complexity is multi-dimensional — technical difficulty, uncertainty, technology count, dependency rigidity, concurrency, and organizational factors must all be assessed together during project planning/estimation, not just size alone.