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Study the following Python program and answer the questions:

def check_number(n):
    if n > 0:
        return "Positive"
    elif n < 0:
        return "Negative"
    else:
        return "Zero"

num = int(input("Enter a number: "))
print(check_number(num))

a. What is the name of the user-defined function?

b. What is the parameter of the function?

c. What will be the output if the user enters -8?

d. Rewrite the function to return "Even" if the number is even and "Odd" if it is odd.

What is IP address? Differentiate between IPv4 and IPv6.

What is data redundancy? How can a DBMS help reduce it?

What is image compression? Why is it important in multimedia?

What is a user-defined function in Python? Write its general syntax.

What is Machine Learning? Mention any two applications of Machine Learning.

What is a communication medium? Explain the following types of communication media with examples:

a. Twisted pair cable
b. Coaxial cable
c. Optical fiber
d. Radio wave

Consider the following table named Employee:

Answer the following:

a. Which field should be used as the primary key? Give a reason.
b. Write an SQL command to display the names of employees working in the IT department.
c. Write an SQL command to increase Nabin's salary to 45000.
d. Write an SQL command to add a new employee with ID 104, name "Mina", department "Finance", and salary 32000.

What is a network protocol? Write any two examples of network protocols.

Differentiate between DELETE and DROP commands in SQL.

Write a Python program to calculate the sum of the first 10 natural numbers using a for loop.

What is Augmented Reality (AR)? Give one example of its use.

What is Big Data? Mention any two characteristics of Big Data.

What is network topology? Mention any two types of network topology.