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You are given a list of n-1 integers and these integers are in the range of 1 to n. There are no duplicates in the list. One of the integers is missing in the list. Write an efficient code to find the missing integer.

In an interview this question has been asked :
How to fit four characters into an integer, implementation should be in C programming language.

For example, four characters, viz., 'a', 'b', 'c', and 'd' need to be fit into an integer.

I tried to answer this question using ASCII value of the characters.

Please suggest the correct solution.

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How to use Verizon Sim Card, Is it simple or not.
if its not easy Please provide Verizon customer support
number.

There is a tree of nodes . each node is of type either place, area name, city, district , state, country

they are in tree like order like country contains multiple states ,states contain multiple cities ...so on

i want define the node structure and define the strategy to print the address of any node given from parent to all the child address of the node

package com.girish.sample;

import java.util.ArrayList;
import java.util.List;

public class Node {

	private String name;
	private Node parent;
	private List<Node> childNodes;
	private String nodeType;
	
	
	public Node(String name,String nodeType){
		this.name = name;
		this.nodeType = nodeType;
	
	}

	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}

	/**
	 * @param name
	 *            the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}

	/**
	 * @return the parent
	 */
	public Node getParent() {
		return parent;
	}

	/**
	 * @param parent
	 *            the parent to set
	 */
	public void setParent(Node parent) {
		this.parent = parent;
	}

	/**
	 * @return the childNodes
	 */
	public List<Node> getChildNodes() {
		return childNodes;
	}

	/**
	 * @param childNodes
	 *            the childNodes to set
	 */
	public void setChildNodes(List<Node> childNodes) {
		this.childNodes = childNodes;
	}

	/**
	 * @return the nodeType
	 */
	public String getNodeType() {
		return nodeType;
	}

	/**
	 * @param nodeType
	 *            the nodeType to set
	 */
	public void setNodeType(String nodeType) {
		this.nodeType = nodeType;
	}

	public String getAddress() {
		return getparentAddress();
	}

	public String getparentAddress() {
		if (parent == null)
			return "";

		return parent.getparentAddress().concat("," + this.nodeType + ": " + this.name);
	}

	public List<String> getchildAddress() {

		List<String> childAddress = new ArrayList();

		for (Node node : childNodes) {

			childAddress.add(node.getchildAddress());

		}

		return null;
	}

}

Array consist of -1 and 1, Find count of all sub-arrays where sum = 0.
Ex. [-1,1,-1,1]
Ans : 4
[-1,1] [1,-1],[-1,1],[-1,1,-1,1]

Ex. [-1,-1,1,1]
Ans : 2 [-1,1][-1,-1,1,1]

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Either C or C++ is faster and which one is efficiently access memory?

Can we execute a C program with out main?

Write a C program to check biggest among two numbers with out using any relational operators.

we create a pipe
int pfd[2];
if (pipe(pfd) == -1) /* Create the pipe */
errExit("pipe");
what will happen if we write to or read from both pfd[0], pfd[1] simultaneously
how to handle such a situation

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In TCP sockets, there is a connection between Ip1,port1 to IP2,port2; how is this connection maintained , how it is different from UDP socket

Design Interprocess Singleton class in C++

When multiple instance of singleton.exe is running, same memory(singleton instance) should be shared among all the process

Did anyone given JPMC java coding test in Jersey city or new York?

How will you do reset password of your gmail account ?

write a function to copy string. You are free to decide function parameters. But once you wrote the function, you need to specifically explain below points
- Function parameters
- What are assumptions (For ex. Destination string should have sufficient memory allocated in advance. means function is not going to allocate memory for destination string)
- Limitation of your function
- Find bugs in your code.

There is Ticketing vending machine which accepts Rs.1, Rs.2 and Rs. 5 coins. There is Rs. 5 Ticket. System will reject all invalid coins for ex. Rs 0.50, Rs. 0.25, Rs 10.
System will not return any money or ticket if coin is invalid.

Design a your own Youtube. Which has feature like play, pause, resume, stop. Note that,
- multiple users can be access multiple videos.
- Mutiple users can access same video at same time or different time.
- Need to tackle performance bottoleneck.

What is Big-O and Big Theta notations?

Suppose your application is hanged in production environment at customer place, how would you diagnose the problem ?

What design pattern you will use in this scenario :
One class will print odd numbers and other class will print even numbers.

Print a singly linked list in ascending and descending order in O(n) time. Both order printing should take O(n) time only.

what is memory leak and write a shell script to find memory leak ?

Given number k, for Single linked list, skip k nodes and then reverse k nodes, till the end.

Given an array which has prime numbers, find all duplicates elements of array.

Given a Binary Search Tree, Replace each node with sum of this node and sum of all nodes greater than this node.

How do you protect your object of your class being deleted by the clients?

U are given a set of strings, using the characters of the given string, the program needs to find the maximum length string that doesn't has any of the given string as its sub-string. In case, if we can have infinite long string satisfying the property, print -1.

I solved this, but looking forward to some convincing algo.

eg 1:
11, 00

longest: 010101010101010101010101... (-1, as infinite long)

eg2
101, 111, 00, 110

longest:010(i think, maybe wrong)

You are given a list of integers. You can call only one method on the list:getItemAt(x), which will return the integer at the index x from the list.

The list starts with value 0 and it goes on to have value 0 continuously until some index. After the index the list continues to have value 1 till the end.

You do not know the size of the list. Its huge. You need to find the index from where the value 1 begins in the list.

Say there are 3 array lists l1, l2 & l3 of same length. Thress threads accessing three lists. Say T1 -> l1, T2 ->l2 & T3 ->l3. It should print in the order say first element of 1st then first element of 2nd list and then first element of 3rd list. Then second element of 1st then second element of 2nd list and then second element of 3rd list.