Question 1(time 10 Mins): a) Declare an array. Append an integer, a double and a string into it. b) Print the Array Question 2(time 10 Mins): Functions: Create a function that will test to see whether a string value contains a valid IPv4 address. An IPv4 address is the address assigned to a computer that uses the internet Protocol (IP) to communicate. An IP address consists of four numeric values that range from 0-255, separated by a dot(period) Example: 10.0.1.250. Question 3(time 10Mins): Error Handling: Create a class called VendingMachine. It must contain an array of strings called ‘items’ as a stored property e.g - var items: [String] = ["Akshay", "Rahul", "Mayank"] Declare array and fill data It must also contain a function ‘getItem’ which takes a string and compares it to the items in the ‘items’ array. If the item is present, it should print ‘Here you go!’ or else it should throw a custom error ‘ItemNotAvailable’. // Step 2: call let objVendingMachine: VendingMachine = VendingMachine() // objVendingMachine.getItem(value "Rahul") // Result should be “Here you go!” Sol1: ``` fun main(args: Array) { val list = mutableListOf() list.add(2.0) list.add(2) list.add("leetcode") print(list) } ``` Sol2: ``` #include using namespace std; bool test(string &s) { if(s[0] == '.' || s[s.length() - 1] == '.') return false; int dots = 0; string currNum = ""; for(auto c : s) { // cout << currNum << " , "; if(c == '.') { if(currNum.size() == 0) return false; int num = stoi(currNum); currNum = ""; if(num < 0 || num > 255) return false; dots +=1; } else { currNum += string(1, c); } } if(dots != 3) return false; if(currNum.size() == 0) return false; int num = stoi(currNum); if(num < 0 || num > 255) return false; return true; } int main() { string ipAddress = "1000.0.1.250"; if(test(ipAddress)) cout << "valid ipv4"; else cout << "not valid"; } ``` Sol3: ``` class VendingMachine { private val items = mutableListOf("Akshay", "Rahul", "Mayank") fun getItem(item: String) { for(it in items) { if(item.equals(it)) continue; else throw Exception("custom exception") } print("Here you go!") } } fun main() { val obj = VendingMachine() obj.getItem("Rahul") } ```