Interview Questions and Answers for 'Io' | Search Interview Question

Interview Questions and Answers - Order By Newest

Q391. What is ConcurrentLinkedDeque ?

Ans. It's a Collections concrete class that provides implementation of a Double Ended queue that allows concurrent insertion, removal, and access operations that can be executed safely across multiple threads.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections queue deque concurrent collections}

Q392. What is CopyOnWriteArrayList ?

Ans. Its a type of ArrayList in which all Write operations , i.e add and set are performed by creating a new copy. This array never changes during the lifetime of the iterator, so it never throws ConcurrentModificationException

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections list arraylist copyonwritearraylist ConcurrentModificationException Asked in 1 Companies}

Q393. What are the advantages and disadvantages of CopyOnWriteArrayList ?

Core Java

Ans. This collections class has been implemented in such a manner that it can never throw ConcurrentModificationException. As it performs update and write operations by creating a new copy of ArrayList, It's slower compared to ArrayList.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections list arraylist copyonwritearraylist advantages-disadvantages ConcurrentModificationException Asked in 4 Companies Expert}

Q394. Name few Concurrent Collection Classes ?

Ans. ConcurrentHashMap
ConcurrentLinkedDeque
ConcurrentLinkedQueue
ConcurrentMap
ConcurrentNavigableMap
ConcurrentSkipListMap
ConcurrentSkipListSet

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections concurrent collections}

Q395. Name few Collections Map implementations ?

Ans. AbstractMap
ConcurrentHashMap
ConcurrentSkipListMap
EnumMap
HashMap
IdentityHashMap
LinkedHashMap
SystemFlavorMap
TreeMap
WeakHashMap

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections map}

Q396. What is ArrayIndexOutOfBoundException ?

Core Java

Ans. Exception thrown by the application is we try to access an element using an index which is not within the range of array i.e lower than 0 or greater than the size of the array.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java exceptions arrayindexoutofboundexception Asked in 1 Companies}

Q397. Name few Restriction Methods ?

Hibernate

Ans. eq, ge, gt , between, in , isNull, isEmpty, isNotnull, ne , like, lt , or , not

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve hibernate hibernate criteria hibernate restriction}

Q398. In Hibernate, While defining Criteria, Have you ever faced any problem while adding restrictions with user defined types or Enums ?

Hibernate

Ans. Yes, with Enum as was getting an exception while doing equality check for enum field.

got it fixed by adding @Enumerated(EnumType.STRING) to the field in entity.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve hibernate hibernate criteria enumerations}

Q399. Which Software Development methodology is being used in your current Job ?

General

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 :

_{Like Discuss Correct / Improve sdlc agile methodology software system analyst software developer interview development lead project lead interview Asked in 14 Companies frequent}

Q400. Which version control system you are using in your current project ?

Tools

Ans. We are using SVN and Git Hub.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve build management version control systems configuration management configuration manager version control manager Asked in 1 Companies}

Q401. Name few interfaces that extends Collection Interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-interfaces-that.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections collection interface}

Q402. Name few classes that extends Collections class ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-inherit.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections collections class}

Q403. Name few abstract classes of Java collections framework ?

Ans. http://www.buggybread.com/2015/02/java-collections-abstract-classes.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections}

Q404. Name few classes that implement Set interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement_78.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections set}

Q405. Name few classes that implement iterable interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement_45.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections iterable}

Q406. Name few classes that implement Map interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement_82.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections map}

Q407. Name few classes that implement List interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement_35.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections list}

Q408. Name few classes that implement Queue interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement_1.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections.queue}

Q409. Name few classes that implement Collection interface ?

Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections collection interface}

Q410. Name few Buffered IO classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-io-buffered-classes-and-interfaces.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java io input output buffered io buffered input output}

Q411. Name few Hash collections classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-hash-collections-classes-and.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections hash collections}

Q412. Name few annotations related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-annotations-classes-and-interfaces.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java annotations}

Q413. Name few Queue classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-collections-queue-classes-and.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections queue}

Q414. What are few iterator classes provided by Java ?

Ans. http://www.buggybread.com/2015/01/java-iterator-classes-and-interfaces.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections iterator}

Q415. Name few Writer classes ?

Ans. http://www.buggybread.com/2015/01/java-output-writer-classes-and.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java input output io writer}

Q416. Name few Reader classes ?

Ans. http://www.buggybread.com/2015/01/java-input-reader-classes-and-interfaces.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java input output io reader}

Q417. Name few Error and Exception classes provided by Java ?

Ans. http://www.buggybread.com/2015/01/java-list-of-error-exception-classes.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java exceptions error}

Q418. Name few classes that are part of java.io package ?

Ans. http://www.buggybread.com/2015/01/java-javaio-classes-and-interfaces.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java java.io}

Rarely asked as it was introduced with Java 8.

Q419. What are the changes in Java.io in Java 8 ?

Core Java

Ans. http://www.buggybread.com/2015/01/migrating-to-java-8-new-classes_62.html

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java java 8 java.io java8}

Q420. What is the difference betweeen @Inject and @Autowired ?

Spring

Ans. @Autowired and @Inject are similar in terms of functionality they achieve. @Inject is part of a new Java technology called CDI that defines a standard for dependency injection whereas @Autowired is a Spring specific annotation for dependency injection.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve spring web frameworks dependency injection autowired inject spring annotations ioc}

Search Interview Questions

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.