Civil Aviation Authority of Bangladesh
Post: Assistant Maintenance Engineer
Exam Date: 2022, Exam Taker: CAAB
[Question Pattern: Bangla=15, English: 15; Math: 20; Technical: 30] Technical=30
Difference between Synchronous and Asynchronous transmission
A logic gate is an electronic circuit designed to perform basic logical operations. It uses components like diodes, transistors, resistors, and capacitors to process binary inputs (0s and 1s) and produce a binary output based on a specific logical function. Common logic gates include AND, OR, NOT, NAND, NOR, XOR, and XNOR.
A universal gate is a type of gate that can implement any basic gates (AND, OR, NOT) as well as any logic circuit. NAND and NOR gates are called universal gates because any logic gate or circuit, including basic gates, can be implemented using only NAND gates or only NOR gates.
Implementation of Basic Gates using NAND Gate:
Implementation of Basic Gates using NOR Gate:
Algorithm for Finding the Factorial Value of an Integer:
- Step 1: Start.
- Step 2: Read a number
n. - Step 3: Initialize variables:
i = 1fact = 1
- Step 4: If
i <= n, go to Step 5; otherwise, go to Step 7. - Step 5: Calculate
fact = fact * i. - Step 6: Increment
iby 1 (i = i + 1) and go back to Step 4. - Step 7: Print the value of
fact. - Step 8: Stop.
Flowchart:
Difference Between UEFI and BIOS
5. Write Short Answer on the following (1*10=10)
In cryptography, plaintext refers to readable text before it is encrypted or after it is decrypted.
HTTP stands for HyperText Transfer Protocol, used for exchanging files on the World Wide Web.
A gateway is used in the Network Layer (Layer-3).
VIRUS stands for Vital Information Resources Under Siege, referring to malicious software that damages data and files.
Charles Babbage is known as the Father of Computers.
Cyber security protects computers, networks, and data from malicious attacks. It includes areas like network security, application security, and information security.
Malware is malicious software designed to harm a system, such as viruses, worms, Trojans, and ransomware.
- Wi-Fi: IEEE 802.11a
- Wi-MAX: IEEE 802.16
- Latest version: Windows 11
- Codename: Sun Valley 2
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