#include <stdio.h>

int main() {
    float price, maxPrice;
    int i;

    printf("Enter price of item 1: ");
    scanf("%f", &maxPrice);

    for (i = 2; i <= 20; i++) {
        printf("Enter price of item %d: ", i);
        scanf("%f", &price);

        if (price > maxPrice) {
            maxPrice = price;
        }
    }

    printf("\nMaximum price = %.2f\n", maxPrice);

    return 0;
}

Given:
Number of bits = 10
Probability of each bit being 1 = 1/2

Step 1: Total possible outcomes
Each bit can be either 0 or 1. Therefore, the total number of possible 10-bit numbers is:

Total outcomes = 2¹⁰ = 1024

Step 2: Favorable outcomes
Only one 10-bit number has all bits equal to 1: 1111111111.

Favorable outcomes = 1

Step 3: Calculate the probability

Probability = Favorable outcomes / Total outcomes

P(All bits are 1) = 1 / 2¹⁰

I protect my computer from malware by taking the following measures:

1. Antivirus Software: I install and regularly update reliable antivirus software to detect and remove malware.

2. Firewall: I enable the firewall to prevent unauthorized access to my computer.

3. Regular Updates: I keep the operating system, browser, and applications updated with the latest security patches.

4. Safe Browsing: I avoid suspicious websites, pop-ups, and unknown download links.

5. Email Security: I do not open suspicious email attachments or click on unknown links.

6. Strong Passwords: I use strong, unique passwords and enable Multi-Factor Authentication (MFA).

7. Regular Backups: I regularly back up important files to an external drive or secure cloud storage.

8. Trusted Software: I download and install software only from trusted sources.

9. USB Security: I scan USB drives and other external storage devices before opening their files.

10. User Awareness: I stay informed about phishing, ransomware, spyware, and other cyber threats.

Conclusion: I protect my computer from malware by using updated antivirus software, enabling a firewall, keeping software updated, browsing safely, and backing up important data.

A key person responsible for Database Management System (DBMS) is generally known as a Database Administrator (DBA). His/her main duties are:

1. Database Design: Designing and organizing the database according to the company's requirements.

2. Data Security: Protecting the database from unauthorized access and ensuring data confidentiality.

3. Backup and Recovery: Taking regular database backups and recovering data in case of system failure or data loss.

4. Performance Monitoring: Monitoring and optimizing database performance to ensure efficient data processing.

5. User Management: Creating user accounts and assigning appropriate access permissions.

6. Data Integrity: Ensuring data accuracy, consistency, and reliability.

7. Database Maintenance: Installing updates, managing storage, and troubleshooting database problems.

8. Availability: Ensuring that the database remains available and operates reliably.

To convert 1234510 to octal, repeatedly divide the number by 8 and record the remainders from bottom to top (MSB to LSB).

The two OSI layers associated with Flow Control are:

1. Data Link Layer (Layer 2):

The Data Link Layer provides Flow Control between two directly connected devices. It ensures that the sender does not transmit frames faster than the receiver can process them. This helps prevent the receiver's buffer from overflowing.

2. Transport Layer (Layer 4):

The Transport Layer provides end-to-end Flow Control between the sender and receiver. It ensures that the sending device does not send data faster than the receiving device can handle. For example, TCP uses a sliding window mechanism for Flow Control.

Conclusion: The Data Link Layer (Layer 2) provides node-to-node Flow Control, while the Transport Layer (Layer 4) provides end-to-end Flow Control.

1. What is a Firewall?

A Firewall is a network security device (hardware or software) that monitors and controls incoming and outgoing network traffic based on predefined security rules. It acts as a barrier between a trusted internal network (LAN) and an untrusted external network (such as the Internet) to prevent unauthorized access and malicious traffic.

2. How Does a Firewall Work?

1. Packet Filtering: It examines data packets based on source and destination IP addresses, port numbers, and protocols, and allows or blocks them according to security rules.

2. Stateful Inspection: It monitors active network connections and allows legitimate traffic while blocking suspicious or unauthorized connections.

3. Network Address Translation (NAT): It can hide internal IP addresses from external networks by translating private IP addresses into public IP addresses.

4. Logging and Monitoring: It records and monitors network activities to help detect suspicious behavior and security threats.

5. Access Control: It prevents unauthorized users from accessing the internal network by enforcing security policies.

3. LAN Network Diagram Showing the Position of a Firewall

Explanation of the Diagram:

The Firewall is situated between the Router and the internal LAN (usually before the LAN switch). All incoming and outgoing traffic passes through the Firewall, where it is inspected according to security rules. Only permitted traffic is allowed to enter or leave the internal network.

Conclusion: A Firewall protects a LAN from unauthorized access, malicious traffic, and network attacks by monitoring and filtering network traffic according to predefined security rules.

SOAP (Simple Object Access Protocol) is a protocol used for exchanging structured information between applications over a network. It commonly uses XML (Extensible Markup Language) to format messages and can operate over protocols such as HTTP and HTTPS.

Features of SOAP:

1. Platform Independent: SOAP allows applications developed on different platforms to communicate with each other.

2. Language Independent: It supports communication between applications written in different programming languages.

3. XML-Based: SOAP messages are formatted using XML.

4. Protocol Independent: SOAP can work over different underlying protocols, including HTTP and HTTPS.

5. Security: SOAP can support message-level security through standards such as WS-Security.

Example: A banking application can use a SOAP Web Service to request an account balance from a bank's server.

public class ODAccount extends BankAccount{
    double limit;
    public void ODAccount(double setLimit){
        $this->balance=0;
        $this->limit=setLimit;
    }
    public void dipositMoney(double deposit Amount){
        balance = balance + depositAmount;
        public void drawMoney(double drawAmount) throws ODLimit Extented{
            if(balance-drawAmount>=-1*limit)
            balance = balance - drawAmount;
            else throw new OD Limit Exceeded();
        }
}