EGCB , Sub Divisional Engineer(ICT), 2023ok

Electricity Generation Company of Bangladesh Ltd(EGCB)

Post: Sub-Divisional Engineer (ICT)
Exam Date: 28.01.2023, Exam Taker: BUET

1.Write down the step of SDLC?

SDLC is a structured process used to develop, maintain, and improve software in a systematic and efficient way.

Phases of SDLC

Planning & Requirement Analysis: Collect and analyze requirements, check feasibility, identify risks.
Defining Requirements: Requirements are documented in SRS (Software Requirement Specification).
Designing: System design is prepared using DDS (Design Document Specification).
Development: Coding is done using programming languages like C++, Java, Python.
Testing: Software is tested to find and fix errors and ensure quality.
Deployment & Maintenance: Software is released and later maintained with updates and bug fixes.

SDLC হলো একটি structured process যা software develop, maintain এবং improve করার জন্য ব্যবহৃত হয়।

SDLC-এর ধাপসমূহ

Planning & Requirement Analysis: Requirement সংগ্রহ ও বিশ্লেষণ করা হয়, feasibility যাচাই এবং risk নির্ধারণ করা হয়।
Defining Requirements: Requirement গুলো SRS (Software Requirement Specification)-এ document করা হয়।
Designing: System design DDS (Design Document Specification)-এর মাধ্যমে তৈরি করা হয়।
Development: C++, Java, Python ইত্যাদি language ব্যবহার করে coding করা হয়।
Testing: Software test করে error খুঁজে বের করা এবং ঠিক করা হয়।
Deployment & Maintenance: Software release করা হয় এবং পরে update ও bug fix করা হয়।

2. Y=A.B+(A. B)' implement all with NAND gate.

A.B+(A.B)’ =((A.B+(A.B)’)’)’ =((A.B)’.(A.B))’

3.What is CIA Triad?

The CIA Triad is a fundamental model in information security that defines three main goals: Confidentiality, Integrity, and Availability.

Confidentiality: Ensures that information is accessed only by authorized users using techniques like encryption and access control.
Integrity: Ensures that data remains accurate and is not modified by unauthorized users using methods like hashing and digital signatures.
Availability: Ensures that systems and data are accessible to authorized users when needed using backups, redundancy, and recovery systems.

CIA Triad হলো information security-এর একটি গুরুত্বপূর্ণ model যা তিনটি প্রধান লক্ষ্য নির্ধারণ করে: Confidentiality, Integrity এবং Availability।

Confidentiality: এটি নিশ্চিত করে যে তথ্য শুধুমাত্র authorized user-ই access করতে পারে, যেমন encryption এবং access control ব্যবহার করে।
Integrity: এটি নিশ্চিত করে যে data সঠিক থাকে এবং unauthorized user দ্বারা পরিবর্তিত হয় না, যেমন hashing এবং digital signature ব্যবহার করে।
Availability: এটি নিশ্চিত করে যে system এবং data প্রয়োজনের সময় authorized user-এর জন্য available থাকে, যেমন backup, redundancy এবং recovery system ব্যবহার করে।

4. What is Database?

A database is a structured collection of data that is stored and managed in a way that makes it easy to access, update, and organize.

Data in a database is typically stored in tables, which consist of rows (records) and columns (fields). Indexing and other techniques are often used to optimize searching and retrieving specific information quickly.

5. What is BIOS?

BIOS is a firmware program stored in a computer’s motherboard that initializes hardware and starts the booting process when the computer is powered on.

Function: It checks and initializes hardware components like CPU, RAM, and storage devices.
Boot Process: It loads the operating system into memory during startup.
Location: Stored in ROM or flash memory on the motherboard.
POST: Performs Power-On Self-Test (POST) to ensure hardware is working properly.

BIOS হলো একটি firmware program যা computer-এর motherboard-এ সংরক্ষিত থাকে এবং computer চালু হলে hardware initialize ও boot process শুরু করে।

Function: এটি CPU, RAM এবং storage device-এর মতো hardware component পরীক্ষা ও initialize করে।
Boot Process: এটি startup-এর সময় operating system memory-তে load করে।
Location: এটি motherboard-এর ROM বা flash memory-তে সংরক্ষিত থাকে।
POST: এটি Power-On Self-Test (POST) চালিয়ে hardware ঠিকভাবে কাজ করছে কিনা তা পরীক্ষা করে।

6. Full meaning of: HTTPS

HTTPS (HyperText Transfer Protocol Secure)

HTTPS is a secure version of HTTP used for communication over the internet. It ensures that data transferred between a user and a website is encrypted and protected.

Security: Uses SSL/TLS protocols to encrypt data.
Data Protection: Prevents hackers from intercepting sensitive information like passwords or credit card details.
Authentication: Verifies that the website is genuine and not a fake one.
Usage: Widely used in secure websites like banking, e-commerce, and login systems.

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Electricity Generation Company of Bangladesh Ltd(EGCB) Post: Sub-Divisional Engineer (ICT)Exam Date: 28.01.2023, Exam Taker: BUET

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Electricity Generation Company of Bangladesh Ltd(EGCB)

Post: Sub-Divisional Engineer (ICT)
Exam Date: 28.01.2023, Exam Taker: BUET