some of the paytm interview questions and answers

Author: javaiskool

BuySell.java

@@ -0,0 +1,65 @@
+import java.util.*;
+
+class BuySell
+{
+public static void main(String args[])
+{
+Scanner in=new Scanner(System.in);
+
+System.out.println("Enter the size of the array");
+int size=in.nextInt();
+
+int arr[]=new int[size];
+
+	for(int k=0;k<size;k++)
+	{
+	System.out.println("Enter the stock price at day"+k);
+	arr[k]=in.nextInt();
+	}
+
+	int buyDay=0;
+	int sellDay=0;
+
+	int k=0;
+	
+	int m=k+1;
+	int nextBuyDay=m;
+	
+	while(m<size)
+	{	
+	int big=arr[k];
+	buyDay=k;
+
+	int flag=0;
+
+		while(m<size)
+		{	
+			if(arr[m]>big)
+			{
+			big=arr[m];
+			sellDay=m;
+			}
+			else
+			{
+			nextBuyDay=m;
+			flag=1;
+			break;
+			}
+		m++;
+		k++;
+		}
+		
+	if(buyDay!=sellDay)
+	System.out.println("buy at day "+buyDay+" and sell at day "+sellDay);
+	if(flag==1)
+	{
+	k=nextBuyDay;
+	m=k+1;	
+	}
+	
+
+}//while		
+
+}
+
+}

One.java

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+//reversing the order of terms of an algebraic expression that contains only 4 basic math operators without changing the order and the number itself e.g for input "5+6*7-60" output should be "60-7*6+5"
+
+class One
+{
+public static void main(String args[])
+{
+
+String str=args[0];
+String reverse="";
+
+int pos=str.length()-1;
+
+String term="";
+
+for(int k=0;k<str.length();k++)
+{
+char ch=str.charAt(pos--);
+
+	switch(ch)
+	{
+	case '-':
+	case '+':	
+	case '/':
+	case '*': 
+		reverse=reverse+term+ch;
+		term="";
+		break;
+	default:	
+		term=ch+term;
+	}
+
+}
+
+System.out.println("reverse is "+(reverse+term));
+}
+
+}