Interview Questions and Answers - Order By Newest Q1391. Can we override abstract methods ? Core Java
Ans. Abstract methods are the methods that need to be overridden in the derived class ( either as implementing method or again abstract method ) so it's not only allowed but its required to override abstract method in the derived class. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Ans. Access Control List or ACL is the list of permissions attached to an object in the File System. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1393. Write a Program to delete a node from Linked List ? Data Structure
This question was recently asked at 'Caprus IT'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1394. Can we override an abstract method with abstract method in the derived class ? Core Java
Ans. Yes, but in that case the derived class itself should be abstract. We cannot have an object of a class without definition for the method which has been declared abstract in the parent. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1395. What is the difference between TimeBasedRollingPolicy and SizeBasedTriggeringPolicy within Log4j ? Can we use both together and What would that mean ? Log4j
Ans. TimeBasedRollingPolicy enables rolling of logs based on the time / days whereas SizeBasedTriggeringPolicy enables rolling of logs based on size cap. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1396. What is the difference between DEBUG and TRACE logging levels ? Log4j
Ans. TRACE designates finer grained informational events than the DEBUG.TRACE is level lower than DEBUG. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1397. how many reducer task runs on a hadoop cluster ? BigData
Ans. Generally one reducer runs for all mappers, but it can be increased as per requirements. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1398. What is the use of Property files ?
Ans. Property files are used to maintain configurable values as key value pairs. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Ans. array is traversed from first element to last element. Here current element is compared with next element. If current element is greater than next element it is swapped. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1404. Write code to check if a Binary tree is symmetrical Algorithm
This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1405. What data structure will you use if we have to search an element in million of elements ? Data Structure
This question was recently asked at 'Microsoft'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1406. Write a function that returns the depth of a tree. Algorithm
This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1407. Write code to find the node where two linked lists intersect. Algorithm
This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1408. Check if tic tac toe has a winner Algorithm
This question was recently asked at 'Microsoft'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1409. Write program to balance a binary tree Algorithm
This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1410. Given a graph, find if it represents a tree Algorithm
Ans. We can simply find it by checking the criteria of a tree. A tree will not contain a cycle, so if there is any cycle in the graph, it is not a tree. We can check it using another approach, if the graph is connected and it has V-1 edges, it could be a tree. Here V is the number of vertices in the graph Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1411. Explain different sorting algorithms and Big O of each Algorithm
This question was recently asked at 'Microsoft,ServiceNow'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 2 Companies Q1412. Write a program to find loop in a linked list Algorithm
This question was recently asked at 'Microsoft'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1413. How to convert a bst to doubly linked list Algorithm
This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Q1414. What is a package management system ? Tool
Ans. A package management system is a collection of software that automates the process of installing, upgrading and configuring an application. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1415. What is RPM ? Tool
Ans. Redhat Packaging system or rpm is a Package Manager or type of Package Management system extensively used for Linux systems. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1416. What is priority inversion inheritance method?
Ans. https://en.wikipedia.org/wiki/Priority_inversion Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 1 Companies Ans. Priority inversion is a problematic scenario in scheduling in which a high priority task is indirectly preempted by a lower priority task effectively inverting the relative priorities of the two tasks. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Asked in 5 Companies Q1418. Does Hibernate synchronize entity with the database automatically i.e any change to entity gets updated in DB ? Hibernate
Ans. Yes, the feature is there but can be override with changing the Flush Mode. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1419. How can we make sure that Hibernate doesn't update the entity changes to DB or how to keep the entity detached ? Hibernate
Ans. If it's only a read only transaction, we can wrap the get / load call in read only transaction. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve Q1420. What is the difference between session.clear and session.evict ? Hibernate
Ans. session.clear clears all the objects from session whereas session.evict is used for evicting a particular entity. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve
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Which of the following session method is used to disassociate / disconnect all objects from the session
