Search Interview Questions |  More than 3000 questions in repository. There are more than 900 unanswered questions. Click here and help us by providing the answer. Have a video suggestion. Click Correct / Improve and please let us know. |
|
|||
|
| ||||
| Interview Questions and Answers - Order By Newest | ||||
  | ||||
 Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback) | ||||
| ||||
| Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
 Discuss Correct / Improve  java design pattern singleton at&t ebay fidelity india united healthcare india  Asked in 46 Companies  intermediate  frequent | ||||
| ||||
| Ans. By having Null Checks. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve exceptions npe nullpointerexception null checks basic frequent | ||||
| ||||
| Ans. Final makes sure that the value doesn't change after initialization and static makes sure that there is only one copy that can be shared across objects. Making it non static will unnecessarily create a different copy per object wherein the same value will kept for all copies ( as its final and cannot be changed ). | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java static final variables variable constants basic frequent | ||||
| ||||
| Ans. Criteria is a simplified API for retrieving entities by composing Criterion objects. For example - session.createCriteria(Employee.class).add( Restrictions.like("name", "A%") ).list(); will return all employee objects having name starting with A. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve hibernate hibernate criteria Asked in 7 Companies Basic Frequent | ||||
 Try 1 Question(s) Test | ||||
| ||||
| Ans. We are using Agile methodology. I attend daily stand up where the development leads takes the status of assigned stories, achievements, any bottlenecks or challenges. We follow iteration of 2 weeks. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve sdlc agile methodology software system analyst software developer interview development lead project lead interview Asked in 14 Companies frequent | ||||
| ||||
| Ans. Use Case Diagram, Component Diagram for High level Design and Class Diagram , Sequence Diagram for low level design. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve software system analyst development lead project lead technical lead technical architect expert frequent | ||||
| ||||
| Ans. I am working as a Software System Analyst that specializes in understanding Business Requirements, Analyzing them , Performs Cost / Benefit analysis, Make suggestions to business , translate the business requirements into technical requirements, Discuss their feasibility with the technical team, performs sizing in coordination with developers and prepare high level design document. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve system analyst software system analyst software business analyst Asked in 4 Companies frequent | ||||
| ||||
| Ans. It is a continuous integration tool written in Java. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java jenkins Asked in 6 Companies Basic frequent | ||||
| ||||
| Ans. float is a native data type whereas Float is a class. A Float object will always take more memory than float variable as there are metadata overheads with the objects. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java data type float Asked in 3 Companies basic frequent | ||||
| ||||
| Ans. Collision is the situation when two different elements have the same Hash Code. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java collections collision hashcode hash code hash collections ebay Asked in 1 Companies intermediate frequent | ||||
| ||||
| Ans. HashMap | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java collections map hashtable Asked in 2 Companies basic frequent | ||||
| ||||
| Ans. We are using cluster of Web servers and Application servers. Load Balancer is used to manage the load between them. Down the layer we have middleware server and then DB server to access database. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve architecture production support java servers application support Asked in 7 Companies frequent | ||||
| ||||
| Ans. Prefix operator performs the increment and then assignment whereas its inverse for postfix operator. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve prefix increment operator postfix increment operator operators java basic frequent | ||||
| ||||
| Ans. [Open Ended Answer] | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve elsevier open ended questions overstock.com cerner Asked in 15 Companies frequent | ||||
| ||||
| Ans. TDD is a development process that involves short iterations: first an automated test case is written. Then, the code is written to pass that test, and finally one refactors the new code to acceptable standards. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve elsevier test driven design ( TDD ) software development methodologies Asked in 3 Companies frequent | ||||
| Frequently asked in face to face interviews. | ||||
| ||||
| Ans. int count = 15; int[] fibonacci = new int[count]; fibonacci[0] = 0; fibonacci[1] = 1; for(int x=2; x < count; x++){ fibonacci[x] = fibonacci[x-1] + fibonacci[x-2]; } for(int x=0; x< count; x++){ System.out.print(fibonacci[x] + " "); } | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve ebay fibonacci series Asked in 66 Companies basic frequent | ||||
| ||||
| Ans. The goal of a synchronised block is to achieve mutual exclusion i.e at one time, the segment of the code should be executed by single thread only and hence the lock needs to be retrieved before executing the segment and then released. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve synchronized block synchronized synchronization multithreading threads mutual exclusion concurrency Asked in 4 Companies intermediate frequent | ||||
| Try 1 Question(s) Test | ||||
| Must know at all levels. Among Top 10 frequently asked questions in Java. Very frequently asked to fresh graduates or less experienced professionals. | ||||
| ||||
| Ans. Its a facility for code reuse and independent extension wherein a derived class inherits the properties of parent class. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve inheritance object oriented programming (oops) oops concepts oops concepts java concepts code reuse code re-use classes derived classes Asked in 14 Companies basic frequent | ||||
| ||||
| Ans. A Java bean is a class which abides by following conventions: Core of the object is member elements and not operations ( methods ) Member Elements can be accessed by getters (and setters if those properties are not read-only). serializable. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java bean javabean pojo classes basic frequent | ||||
| ||||
| Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?keyword=singleton+class&category=code | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve singleton code coding design pattern Asked in 1 Companies Intermediate frequent | ||||
| ||||
| Ans. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve static polymorphism object oriented programming (oops) oops concepts dynamic polymorphism object oriented programming (oops) oops concepts polymorphism object oriented programming (oops) oops concepts overloading overriding broadridg Asked in 1 Companies basic frequent | ||||
| Very frequently asked to fresh graduates. Frequently asked in NSEiT and Accenture India | ||||
| ||||
| Ans. public class Main { public static void main(String args[]) { int number = 2; int count = 0; long sum = 0; int givenNumber = 1000; while (count < givenNumber) { if (isPrimeNumber(number)) { sum = number; count; } number; } System.out.println(sum); } private static boolean isPrimeNumber(int number) { for (int i = 2; i <= number / 2; i) { if (number % i == 0) { return false; } } return true; } } | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve generate prime numbers code coding Asked in 5 Companies basic frequent | ||||
| ||||
| Ans. false false | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve object equality code coding frequent | ||||
| ||||
| Ans. There was no multiple inheritance in java before version 8 as implementing multiple interfaces cannot be termed as inheritance. With Java 8 , came the concept of default methods wherein the class implementing the interface carries the default implementation from the interface and hence facilitating multiple inheritance. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve multiple inheritance object oriented programming (oops) oops concepts inheritance object oriented programming (oops) oops concepts oops concept Asked in 10 Companies frequent | ||||
| ||||
| Ans. Destructor is used to de-allocate memory allocated by objects. There are no destructors in Java. Alternatively, Java provides Automatic garbage collection i.e automatically releasing the un-referenced memory. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve destructor garbage collection Asked in 11 Companies Basic frequent | ||||
| Try 1 Question(s) Test | ||||
| Frequently asked. | ||||
| ||||
| Ans. It should either implement all interface methods or declare unimplemented methods as abstract. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve interfaces Asked in 1 Companies Basic frequent | ||||
| Try 1 Question(s) Test | ||||
| ||||
| Ans. It should either implement the abstract methods or re-declare them abstract. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve abstract class Asked in 2 Companies Basic Frequent | ||||
| ||||
| Ans. 1. Function Local Variables 2. Instance Variables 3. Class variables or static variables | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve variables Asked in 1 Companies basic frequent | ||||
| ||||
| Ans. Distributed file system and Map Reduce system. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve hadoop bigdata hadoop system components frequent | ||||
| ||||
| Ans. http://www.programcreek.com/2012/11/quicksort-array-in-java/ | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve quick sort sort Asked in 2 Companies frequent | ||||
| | ||||
Which of the following Design pattern has been used with Hibernate Criteria ?
