Software Developer

The problem can be solved in O(n) time using hashing. Use a hash set to check for the current array value. Check if target sum – current value exists in the map or not. If it exists, that means a pair with sum equal to target sum exists in the array.

The concept of sticky sessions is applied here. When a new user visits the website for the first time, the load balancer routes his or her request to one of the backend servers and maintains track of which backend server received the request from that IP address or user. When the load balancer receives a request from this IP, it will now forward it to the load balancer. No matter how many servers are behind it, it always sends this request to the same one. As a result, user sessions are maintained because the request of this specific user is always processed by the same server on the backend.

The brute force approach would be to generate all possible permutations of the number and find the number which is just greater than N and is also an palindrome. The time complexity of this approach would be O(N!) where N are the number of digits in the given number.
A better approach would be :
1. Calculate mid = n/2 – 1.
2. Start traversing from the digit at index mid up to the 1st digit and while traversing find the index i of the rightmost digit which is smaller than the digit on its right side.
3. Search for the smallest digit > than the digit num[i] in the index range i+1 to mid. Let the index of this digit be smallest.
4. If no such smallest digit found, then it is not possible. Else swap the digits at index i and smallest and also swap the digits at index n-i-1 and n-smallest-1 to maintain the palindromic property in num.
5. Next, Reverse the digits in the index range i+1 to mid. 
6. Also If n is even then reverse the digits in the index range mid+1 to n-i-2 else if n is odd then reverse the digits in the index range mid+2 to n-i-2 to maintain the palindromic property in num.
7. Print the final modified number num.

A simple approach could be to use a stack. Traverse the given list and push all the nodes to a stack. Now, Traverse the list again. For every visited node, pop the topmost node from the stack and compare data of popped node with the currently visited node. If all nodes match, then the linked list is a palindrome. 
Time Complexity :O(N) 
Auxiliary Space: O(N)
A better approach would be to reverse the second half of the list. Get the middle of the linked list and reverse the second half of the linked list. 
Next, Check if the first half and second half are identical. If they are identical, return true. 
Time Complexity :O(N) 
Auxiliary Space: O(1)

The singleton design pattern can be implemented in Java as follows :
// Classical Java implementation of singleton
// design pattern
class Singleton
{
private static Singleton obj;

// private constructor to force use of
// getInstance() to create Singleton object
private Singleton() {}

public static Singleton getInstance()
{
if (obj==null)
obj = new Singleton();
return obj;
}
}

A specific file called php.ini is used as a default configuration file. It's a crucial configuration file that determines what a user can and can't do on the website. The system reads the php.ini file every time PHP is started. This configuration file is to be used if you need to change PHP's behavior at runtime.

The simplest method would be to Change memory_limit globally from php.ini. Just edit your php.ini and change the memory_limit to whatever you need. To make this change, You require access to make changes to php.ini on the system. This change is global and will be used by all php scripts running on the system. Once you change this value, you will need to restart the web server in order for it to become active.

CREATE PROCEDURE GetItemDesc
AS
BEGIN
SET NOCOUNT ON

SELECT P.ID,P.tName,PD.Description FROM 
Item P
INNER JOIN Description PD ON P.ID=PD.ID

END

1. An abstract class can extend only one class or one abstract class at a time. An interface can extend any number of interfaces at a time
2. An abstract class can extend another concrete (regular) class or abstract class. An interface can only extend another interface
3 An abstract class can have both abstract and concrete methods. An interface can have only abstract methods
4 In abstract class keyword “abstract” is mandatory to declare a method as an abstract. In an interface keyword “abstract” is optional to declare a method as an abstract
5 An abstract class can have protected and public abstract methods. An interface can have only have public abstract methods

The following function can be used:
function get_hostname(url) {
var m = url.match(/^http:\/\/[^/]+/);
return m ? m[0] : null;
}

A closure is a function that has been bundled together (enclosed) with references to its surroundings (the lexical environment). In other words, a closure allows an inner function to access the scope of an outside function. Closures are formed every time a function is created in JavaScript, during function creation time.