Bakhrabad Gas Distribution Company Limited
Post: Assistant Engineer (CSE)
Exam Date: 19-11-2021, Exam Taker: BUET


BFS Traversal order: A B C D E F

DFS Traversal order: A B C D E F
#include <stdio.h>
int main() {
int i, sum = 0, p;
for (i = -1, p = 0; i <= 10; i = i + 2) {
p = i * i;
if (i > 5)
break;
sum = sum + (i + p);
printf("i = %d p = %d sum = %d\n", i, p, sum);
}
printf("The Outer Loop i = %d p = %d sum = %d", i, p, sum);
return 0;
}
i = -1 p = 1 sum = 0 i = 1 p = 1 sum = 2 i = 3 p = 9 sum = 14 i = 5 p = 25 sum = 44 The Outer Loop i = 7 p = 49 sum = 44

3-Way Handshake Protocol in TCP Connection Establishment
The 3-way handshake is a mechanism used by TCP to establish a reliable connection between a client and a server before data transmission begins.
Step 1: SYN (Synchronization)
The client initiates the connection by sending a SYN packet to the server containing an initial sequence number.
Step 2: SYN-ACK (Synchronization and Acknowledgment)
After receiving the SYN packet, the server replies with a SYN-ACK packet, acknowledging the client’s request and sending its own sequence number along with window size and maximum segment size.
Step 3: ACK (Acknowledgment)
The client sends an ACK packet to the server to confirm receipt of the SYN-ACK, after which the TCP connection is successfully established and data transfer can begin.
TCP Connection Establishment-এ 3-Way Handshake Protocol
3-way handshake হলো TCP protocol-এর একটি প্রক্রিয়া, যার মাধ্যমে client ও server-এর মধ্যে একটি reliable connection স্থাপন করা হয় data transmission শুরু করার আগে।
Step 1: SYN (Synchronization)
Client প্রথমে server-এর কাছে একটি SYN packet পাঠায়, যেখানে একটি initial sequence number থাকে।
Step 2: SYN-ACK (Synchronization and Acknowledgment)
Server SYN packet পাওয়ার পর SYN-ACK packet পাঠায়, যা client-এর request acknowledge করে এবং server-এর sequence number, window size ও maximum segment size জানায়।
Step 3: ACK (Acknowledgment)
Client SYN-ACK পাওয়ার পর ACK packet পাঠায় এবং এর মাধ্যমে TCP connection সম্পূর্ণভাবে স্থাপিত হয় ও data transmission শুরু হয়।
