CareerCup

given an array (list) of integers return true(boolean function) if two of the numbers add to 12.

Take a string as input and add the digits present in that

string.
Ex:I/P="asdf12bgt3bh5j"
O/P=20

I/P="iuy2hjg4jhg8"
O/P=14

I/P="7 13"
O/P=20

Take an array of integers as input. print the pair of

prime number and even number. Remaining numbers

should appear at the last.
Ex: I/P=[1,5,9,7,3,6,8,13,2,4]
O/P=[5,6,7,8,3,4,1,9,13,2]

public class MyClass {

public static int num=1;
public static boolean flag=false;

public static void main(String[] args) {
Thread t =new Thread(new MyThread());
t.start();
MyClass.flag=true;
MyClass.num=10;
}

}


class MyThread implements Runnable{

public void run() {

while(!MyClass.flag){
Thread.yield();
}

System.out.println(MyClass.num);


}
}

Output of this code and the reason for the output?

When a Synchronied method is executed in a Java class, which Object is getting locked ?

How write your own annotations in Java ?

In JDBC, When you do the following

Class.forName("driver class name")
Connection conn = DriverManager.getConnection()

How does JVM recognizes to give the exact driver's connection object which has been loaded by Class.forNAme in the previous line ?

What is dependency injection and Inversion of Control in Spring ?

In Java Threadpool Executor, what are the possible rejection policies if all the threads are used.

/* do not use any JAVA APIs(Ex:Calenders)
Write a method that takes an instance of our new class SimpleDate and returns the first day of the next calendar quarter (i.e. Jan 1, 2000; April 1, 2000, etc.) as a SimpleDate.
/**
Simple data structure representing a Date
*/
public class SimpleDate {
protected int year = 0;
protected int month = 0;
protected int day = 0;

public SimpleDate (int year, int month, int day) {...}
public void setDate (int year, int month, int day) {...}
public void setYear (int year) {...}
public int getYear () {...}
public void setMonth (int month) {...}
public int getMonth () {...}
public void setDay (int day) {...}
public int getDay () {...}
}

// 3/17/2009 -> 4/1/2009

Given a 1D array with integers,print vertical bars of # such that if a[i] = n, then print # n times from the bottom.

For eg, {1,4,3,2}

o/p : #
# #
# # #
# # # #

Simple java code to print a character.the character should be printed according to users height and width.
ex:h=5,w=3

One classic method for composing secret message is called a Square code. The spacesare removed from the english text and the characters are written into a square or rectangle.
For example the sentence "If man was meant to stay on the ground god would have given us roots" is 54 characters long. So it is written into a rectangle with 7 rows and 8 columns.

ifmanwas
meanttos
tayonthe
groundgo
dwouldha
vegivenu
sroots

The coded message is obtained by reading down the columns going left to right.
For example the message above is coded as:

imtgdva fearwer mayoogo anouuio ntnnlvt wttddes aohghn sseoau

In your program, have the user enter a message in english, remove the spaces and then build the square code and display the output..

Find a longest string which contain continues alphabets in a jumbled letters of a string. For ex: I/O="asdbcdefgmnxyz" O/P="bcdefg".

write a program in java to take the i/p as "aaahhrrrvfuuk" and return the o/p as "a3h2r3vfu2k"

The problem gives you a sample input data file containing the all the employee-employer relationship information of a company. For example "Peter, John, 2013, software developer--John, NULL, 2012, CEO--David, Peter, 2014, technician..." means there are 3 people int this company (segmented by '--' ), the first 1 is Peter, his boss is John, he entered the company in 2013 as a software developer. The second is John as CEO, with no boss, the third is David as technician, his boss is Peter. The problem is asking to output information in hierarchy style

You have a function rand5(). This function returns numbers between 1 and 5 randomly with equal probability. Implement a function rand7() which makes use of rand5 to return a number between 1 and 7 randomly with equal probability.

The SHIELD is a secretive organization entrusted with the task of guarding the world against any disaster. Their arch nemesis is the organization called HYDRA. Unfortunately some members from HYDRA had infiltrated into the SHIELD camp. SHIELD needed to find out all these infiltrators to ensure that it was not compromised.

Nick Fury, the executive director and the prime SHIELD member figured out that every one in SHIELD could send a SOS signal to every other SHIELD member he knew well. The HYDRA members could send bogus SOS messages to others to confuse others, but they could never receive a SOS message from a SHIELD member. Every SHIELD member would receive a SOS message ateast one other SHIELD member, who in turn would have received from another SHIELD member and so on till NickFury. SHIELD had a sophisticated mechanism to capture who sent a SOS signal to whom. Given this information, Nick needed someone to write a program that could look into this data and figure out all HYDRA members.

Sample Input
Nick Fury : Tony Stark, Maria Hill, Norman Osborn
Hulk : Tony Stark, HawkEye, Rogers
Rogers : Thor,
Tony Stark: Pepper Potts, Nick Fury
Agent 13 : Agent-X, Nick Fury, Hitler
Thor: HawkEye, BlackWidow
BlackWidow:Hawkeye
Maria Hill : Hulk, Rogers, Nick Fury
Agent-X : Agent 13, Rogers
Norman Osborn: Tony Stark, Thor

Sample Output
Agent 13, Agent-X, Hitler


You can code in any language of your choice. Input and Output must be in the same format as above

In a single pass, find Nth node from last in a Linked List.
{ N can be any value. }

Garbage collection in java

We have a folder containing around 10000 files and each file having size greater than 2 GB.These files contain three fields namely date,users and their names.
How can we get the count of all unique users from 10000 files?

How hashmaps are implemented internally, Write data structure definition, one more java question on Equality check for String Pools, String object references.

How to find efficiently the minimum of an array of integers that is the maximum of other arrays?

Example:
A = [126, 110, 130]
B = [125]
C = [105, 115]

The minimum element of array A that is the maximum of B and C is 126

You are given a list of strings

/flapp/server/apache
/d/apps
/d/apps/pub
/flapp
/flocal/firms
/d/sw/java
/d/sw/orcl/jdbc


The filtered strings shoud be
/flapp
/d/apps
/d/sw/java
/d/sw/orcl/jdbc
/flocal/firms

You have to identify the problem/requirement and provide solution that can work for any input with similar pattern.

I have interview with Ericsson:

Working knowledge of server-side JavaScript

Working knowledge of WSDL, XSD and XML

Working knowledge of workflow concepts such as BPM, BPMN, BPML and BPEL.

Working knowledge of HTML

Working knowledge of integration technologies/frameworks including AXIS, SOAP, JMS, HTTP, Socket, FTP, SMTP/POP and integration platforms (EAI, ESB, BPI) such as JMS, MQ, WLI and Tibco

Good design skills

please help if anyone gone through interview process of Ericson.

A program that prints all combinations of a n letter word without using recursion technique.
Example :
Word : abcd
abcd
bacd
cabd
acbd
bcad
cbad
dbac
bdac
adbc
dabc
badc
abdc
acdb
cadb
dacb
adcb
cdab
dcab
dcba
cdba
bdca
dbca
cbda
bcda

Having A List of int [1,1,1,3,1,2,1,1,4,1]

Output needed [1,5,6,3,7,2,8,9,4,10]
Note: Need not to change value of 3,2,4

Implement a Singleton class in java? How will this help?

A server receives requests from different clients...each client send a Runnable job and time on which this job should be run. Write a java program that would accept these jobs and run each job at the required time. Hint: the solution should have a job priority queue to hold the jobs and it should be multithreaded. One thread should accept the tasks, the other one should run the jobs. Also conditions and signalling will be used

You have a class that many libraries depend on. You need to modify the class for one application. Which of the following changes require recompiling all libraries before it is safe to build the application?

a. add a constructor
b. add a data member
c. change destructor into virtual
d. add an argument with default value to an existing member function