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Interview Questions and Answers for 'Ear' - 41 question(s) found - Order By Rating | ||||
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Ans. SNMP or Simple Network Management protocol is an application layer protocol for exchanging management information between network devices. | ||||
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Like Discuss Correct / Improve   Asked in 15 Companies | ||||
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Ans. Memory Reuse and Sharing. | ||||
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Like Discuss Correct / Improve   Asked in 1 Companies | ||||
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This question was recently asked at 'ServiceNow'.This question is still unanswered. Can you please provide an answer. | ||||
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Like Discuss Correct / Improve  binary search tree Asked in 1 Companies | ||||
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Ans. 1 , We can do self join | ||||
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Like Discuss Correct / Improve  sql join Asked in 1 Companies | ||||
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Ans. Every fresh session having its own cache memory, Caching is a mechanism for storing the loaded objects into cache memory. The advantage of cache mechanism is, whenever again we want to load the same object from the database then instead of hitting the database once again, it loads from the local cache memory only, so that the no. of round trips between an application and a database server got decreased. It means caching mechanism increases the performance of the application. In hibernate we have two levels of caching First Level Cache [ or ] Session Cache Second Level Cache [ or ] Session Factory Cache [ or ] JVM Level Cache | ||||
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Like Discuss Correct / Improve   Asked in 23 Companies | ||||
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This question was recently asked at 'Nagarvision'.This question is still unanswered. Can you please provide an answer. | ||||
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Like Discuss Correct / Improve  search  binary search Asked in 1 Companies basic   frequent | ||||
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Ans. Relational Database uses linear search if we don't query using indices. Performance for linear search is O(n). If indices have been used , relational database uses binary search. Performance for binary search is O(Log n). Casandra uses hash search. Performance for Hash Search is O(1). | ||||
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Like Discuss Correct / Improve  cassandra vs oracle  nosql vs relational  search algorithm | ||||
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Ans. Cassandra uses Hash Search which provides a look time of O(1) whereas Oracle Indices uses Binary Search that provide a lookup time of O(Log n). | ||||
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Like Discuss Correct / Improve  cassandra  hash search  hash search vs binary search | ||||
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Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features 1. Inheritance for Code Reuse 2. Abstraction for modularity, maintenance and agility 3. Encapsulation for security and protection 4. Polymorphism for flexibility and interfacing | ||||
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Like Discuss Correct / Improve  oops  oops features Asked in 260 Companies basic   frequent | ||||
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Ans. Synchronized List locks the whole list to provide synchronization and thread safety during the read or write operation, while, CopyOnWriteArrayList doesn’t lock the whole list during these operations. The CopyOnWriteArrayList class works according to its name i.e. copy-on-write which performs different actions for reading and write operations. For every write operation (add, set, remove, etc), it makes a new copy of the elements in the list. and for the read operations (get, iterator, listIterator, etc), it works on a different copy. So there is no additional overhead during a read operation and its read operation is faster than Collections.SynchronizedList(). Thus, COWAL is better for reading operation than Synchronized List. | ||||
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Like Discuss Correct / Improve  Collections.synchronizedList()  CopyOnWriteArrayList | ||||
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Ans. It is used to clear the session and is used to dissociate disconnect all the objects from the session. | ||||
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Like Discuss Correct / Improve  hibernate session clear | ||||
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Ans. session.clear clears all the objects from session whereas session.evict is used for evicting a particular entity. | ||||
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Like Discuss Correct / Improve  hibernate session clear  hibernate evict | ||||
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This question was recently asked at 'Microsoft'.This question is still unanswered. Can you please provide an answer. | ||||
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Like Discuss Correct / Improve  Search Asked in 1 Companies | ||||
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Ans. Abstraction, Encapsulation, Polymorphism , Composition and Inheritance | ||||
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Like Discuss Correct / Improve  core oops concepts Asked in 65 Companies basic   frequent | ||||
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Ans. Selenium WebDriver is a tool for automating web application testing.It helps in replicating the manual tester behavior like keyboard entry, mouse events etc and then matching the output against the expected. | ||||
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Like Discuss Correct / Improve  selenium  webdriver Asked in 37 Companies | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { System.out.println(factorial(5)); } private static int factorial(int number){ if(number == 1){ return 1; } else { return number * factorial(number - 1); } } } | ||||
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Like Discuss Correct / Improve  recursion Asked in 25 Companies | ||||
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Ans. Yes its useless if we are not going to use its objects within Hash collection, For example - HashSet , HashMap. HashCode is used internally by these collections for Search. | ||||
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Like Discuss Correct / Improve  hashcode  hash collections  search | ||||
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This question was recently asked at 'HeadStrong,ServiceNow'.This question is still unanswered. Can you please provide an answer. | ||||
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Like Discuss Correct / Improve  Search Algorithm  Sorting Algorithm Asked in 2 Companies basic   frequent | ||||
Very frequently asked. Usually asked in this format or as difference with interfaces / concrete classes. | ||||
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Ans. Abstract class is the class that is not supposed to be instantiated. The purpose of the class to only have extension to the derived class. | ||||
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Like Discuss Correct / Improve  abstract class Asked in 6 Companies basic   frequent | ||||
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Ans. https://en.wikipedia.org/wiki/Database_normalization | ||||
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Like Discuss Correct / Improve  normalization  database Asked in 35 Companies intermediate   frequent | ||||
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Ans. Maven is a build automation tool used primarily for Java projects. | ||||
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Like Discuss Correct / Improve  maven  build Asked in 6 Companies basic   frequent | ||||
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Ans. Spring Boot is Springs convention-over-configuration solution for creating stand-alone, production-grade Spring-based Applications. | ||||
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Like Discuss Correct / Improve  Spring Boot Asked in 7 Companies | ||||
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This question was recently asked at 'Myntra'.This question is still unanswered. Can you please provide an answer. | ||||
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Like Discuss Correct / Improve  Full Text Search  Data Structure Asked in 1 Companies expert | ||||
Frequently asked Generic Question. | ||||
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Ans. [Open Ended Answer] Usually answered stating your keen interest in the role offered and challenges and opportunities the role offers. | ||||
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Like Discuss Correct / Improve   Asked in 42 Companies   frequent | ||||
Frequently asked to Fresh graduates. | ||||
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Ans. http://algs4.cs.princeton.edu/11model/BinarySearch.java.html | ||||
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Like Discuss Correct / Improve  binary search  search Asked in 5 Companies basic   frequent | ||||
Try 1 Question(s) Test | ||||
Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback ) and Epam Systems | ||||
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Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory. x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object. Sample code: String x = new String("str"); String y = new String("str"); System.out.println(x == y); // prints false System.out.println(x.equals(y)); // prints true | ||||
Sample Code for equals | ||||
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Like Discuss Correct / Improve  java   string comparison   string   object class   ==   equals   object equality  operator   == vs equals   equals vs == Asked in 294 Companies basic   frequent | ||||
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Frequently asked in Cognizant (CTS) | ||||
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Ans. Storing the state of an object in a file or other medium is called serialization. Classes can communicate only if they are built together ( as they need Byte code for communication ). What if we need to enable communication between different applications ( i.e they have been built independently or even they reside at different locations ), We need a mechanism that will transfer the Bean state to a Medium than can be transferred to the receiving application. | ||||
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Like Discuss Correct / Improve  java   oops   serialization Asked in 18 Companies basic   frequent | ||||
Try 1 Question(s) Test | ||||
Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant | ||||
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Ans. Object that can't be changed after instantiation. | ||||
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Like Discuss Correct / Improve  java   oops   immutable  immutability Asked in 27 Companies basic   frequent | ||||
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Ans. We need to access values on the basis of an index in Binary search which is not possible with Sets. | ||||
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Like Discuss Correct / Improve  java   sets   set   collections   binary search | ||||
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Ans. 1. Collection should have an index for random access. 2. Collection should have ordered elements. | ||||
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Like Discuss Correct / Improve  java   collections   search algorithm   search   binary search   at&t intermediate | ||||