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Interview Questions and Answers - Order By Newest

Q941. Name few annotations related classes and interfaces ?

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

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Q942. Name few Threads related classes and interfaces ?

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

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Q943. Name few Boolean classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-double-classes-and_31.html

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Q944. Name few Double data types related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-double-classes-and.html

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Q945. Name few float data type related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-float-classes-and.html

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Q946. Name few Integer related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-integer-classes-and.html

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Q947. Name few long data type related classes and interfaces ?

Ans. http://www.buggybread.com/2015/01/java-data-types-long-classes-and.html

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Q948. Name few String related classes and interfaces ?

Core Java

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

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Q949. Name few Queue classes and interfaces ?

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

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Q950. What are few iterator classes provided by Java ?

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

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Q951. Name few Writer classes ?

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

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Q952. Name few Reader classes ?

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

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Q953. Name few Error and Exception classes provided by Java ?

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

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Q954. Name few classes that are part of java.io package ?

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

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Rarely asked as it was introduced with Java 8.

Q955. 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

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Q956. Name few classes that are part of java.lang package ?

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

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Q957. Name few classes that are part of java.util package ?

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

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Q958. Name few Java util classes that were introduced with Java 7 ?

Ans. http://www.buggybread.com/2015/01/migrating-to-java-7-new-classes_25.html

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Q959. Name few Java Util classes introduced with Java 8 ?

Core Java

Ans. http://www.buggybread.com/2015/01/migrating-to-java-8-new-classes_25.html

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Rarely asked as it was introduced with Java 8.

Q960. Name few java.lang classes introduced with Java 8 ?

Core Java

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

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Q961. 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.

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Q962. How to make sure that a string contains only Numerals ?

Core Java

Ans. We can use NumberUtils.isNumber which is a part of apache commons package.

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Q963. What is Jenkins ?

Jenkins

Ans. It is a continuous integration tool written in Java.

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_{Like Discuss Correct / Improve java jenkins Asked in 6 Companies Basic frequent}

Q964. Which SCM tools Jenkins supports ?

Jenkins

Ans. AccuRev, CVS, Subversion, Git, Mercurial, Perforce, Clearcase and RTC

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Q965. What you do to make sure that your project doesn't break in Jenkins ?

Jenkins

Ans. I make sure that I perform successful clean install on my local machine with all unit tests.
Then I make sure that I check in all code changes.
Then I do a Synchronize with repository to make sure that all required config and POM changes and any difference is checked into the repository.

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Q966. What you do when you see a broken build for your project in Jenkins ?

Jenkins

Ans. I will open the console output for the build and will try to see if any file changes were missed.
If not able to find the issue that way, Will clean and update my local workspace to replicate the problem on my local and will try to solve it.

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Q967. Do you know the way to remove unused imports automatically in eclipse ?

Eclipse

Ans. Select the package -> Right Click -> Source -> Organize Imports.

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Q968. What is Nagios ?

Ans. Nagios is open source system , network and infrastructure monitoring software application. It alerts the user if anything goes wrong. Nagios is widely used as monitoring tool for enterprise applications.

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Q969. Should we have instance variables in the Spring Bean which has been scoped as Singleton ?

Spring

Ans. No, if required we should only have final variables.Bean scoped singleton means that only one instance of the bean will be created and will be shared among different requests and hence instance variables will get shared too.

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Q970. What is the difference between Fisheye and Crucible ?

Ans. FishEye is used to extract information from source code repository whereas Crucible is used to request, perform and manage code reviews.

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_{Like Discuss Correct / Improve java fisheye crucible code review tools}

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