Interview Question and Answers | Search Coding Interview Questions

Interview Questions and Answers - Order By Newest

Q1421. Have you worked with the TreeViewer ? If yes , explain

Ans. The TreeViewer class provides viewer support for displaying trees. This widget is used to display parent-child information with buttons to expand and collapse the tree.

We have to create and specify the LabelProvider and Content Provider classes. In the respective classes we specify the parent and child objects and their relationship.

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

_{Like Discuss Correct / Improve}

Q1422. Which class is used to create buttons and how many classes we have to create different button types ?

SWT

Ans. Only a single class ie Button is used to create all button types. We distinguish among different types by specifying the style while creating a new button object.

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

_{Like Discuss Correct / Improve}

Q1423. If we need to change the cell text in tableviewer or tree viewer , which file should we make the change in ?

SWT

Ans. LabelProvider

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

_{Like Discuss Correct / Improve}

Q1424. Which Web and Application server is being used by your application ?

Server

Ans. We are using Apache 2.3 and Tomcat 5.6

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

_{Like Discuss Correct / Improve web server application server server Basic frequent}

Q1425. What are the steps you follow if you receive an application outage ticket ?

Support

Ans. a. Inform the stake holders that the issue is being worked upon.
b. Login to server to see if its responding.
c. Access Application and Web Server logs to see if the application is receiving requests.
d. If not, Involve the appropriate Network Team.
e. Inform the stakeholders regarding the progress.
f. Bounce the web / application server instance , if required.
g. Close the ticket with the steps taken to resolve the problem.
h. Complete the RCA ( Root Cause Analysis ) and submit the report to stake holders.

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

_{Like Discuss Correct / Improve production support}

Q1426. How do you monitor the server resources if inadvertently high traffic is reported ?

Support

Ans. We use SAR command for that purpose. We also have GUI system monitoring tool to keep real time check of requests, load and memory usage.

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

_{Like Discuss Correct / Improve production support unix SAR}

Q1427. How do you monitor your logs while investigating a high severity problem ?

Support

Ans. We try to look for errors in the last n minutes when the issue occurred. If the issue is still occurring intermittently, We tail the logs for different application server instances to see the error snippets coming in the live logs.

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

_{Like Discuss Correct / Improve production support unix application logs}

Q1428. Have you done any sort of automation in your system monitoring tasks ?

Support

Ans. Yes we have created System as well as Log monitoring scripts to keep track of exceptions. We are also using a tool that will inform the stake holders if an exceptional event occurs with the system.

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

_{Like Discuss Correct / Improve production support system monitoring log monitoring}

Q1429. What all caching has been used in your application?

Support

Ans. We are using Akamai as web server cache.

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

_{Like Discuss Correct / Improve caching production support}

Q1430. Have you ever faced any problem due to caching?

Support

Ans. Yes , sometime we receive issues related to outdated pages being rendered to the user. In those cases we clear the cache and then try to investigate the reason for that. Sometime the issue is due to comparatively high refresh interval. In those cases we reduce the cache refresh interval.

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

_{Like Discuss Correct / Improve production support caching}

Q1431. What actions you take if there is an issue related to Database server ?

Support

Ans. We involve DBA and try to solve it through them. By the time they are solving it , we keep the stake holders informed regarding the progress.

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

_{Like Discuss Correct / Improve database database server production support}

Q1432. Do you use command aliases while doing your work ?

General

Ans. Yes , I have created many aliases and saved them within my .profile file so that the system loads them, the each time i logs onto the server.

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

_{Like Discuss Correct / Improve unix command aliasis}

Q1433. What are your responsibilities after the problem ticket has been closed ?

Support

Ans. We inform the stakeholders regarding the resolution and steps taken for it. We updated the ticket notes and link it with the master / related tickets. RCA is done for the high priority and critical issues and a report is submitted.

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

_{Like Discuss Correct / Improve production support system support}

Q1434. How are DB transactions handled in Hibernate ?

Hibernate

Ans. // Non-managed environment idiom
Session sess = factory.openSession();
Transaction tx = null;
try {
tx = sess.beginTransaction();

// do some work
...

tx.commit();
}
catch (RuntimeException e) {
if (tx != null) tx.rollback();
throw e; // or display error message
}
finally {
sess.close();
}

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

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

Q1435. How to use Find command in Unix ?

Unix

Ans. http://javasearch.buggybread.com/UnixCommand/searchUnixCommandsScripts.php?keyword=find

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

_{Like Discuss Correct / Improve find command Asked in 1 Companies}

Q1436. How can be restrict creation of more than n objects in Java ?

Core Java

Ans. We can follow the same design which we follow in singleton Classes. We can have a static counter that will keep the count of number of objects already created, We can keep the constructor private and being called through the static method. We can keep incrementing the counter before calling the constructor and put a check to call only if it's lesser than n.

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

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

Q1437. Do you feel that its useless to define hashCode method for a class ?

Core Java

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.

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

_{Like Discuss Correct / Improve hashcode hash collections search}

Q1438. What is the difference between filter and filter-mappings xml tag within deployment descriptor ?

Java EE

Ans. filter tag speficies the filter name and respective class for handling filter action whereas filter mapping maps the filter to the url patterns ( specifying the url that needs to be intercepted )

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

_{Like Discuss Correct / Improve deployment descriptor web.xml filters filter mapping}

Q1439. Have you heard of SiteMesh ?

Java EE

Ans. Sitemesh is a web page layout and decoration framework by OpenSymphony. SiteMeshFilter can intercept the requests and then build UI components (based on configuration) then renders the final page.

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

_{Like Discuss Correct / Improve sitemesh}

Q1440. What is a class and object ?

or

How would you explain a fresher the concept of class and object in simple terms ?

Core Java

Ans. Class is a template using which objects are created in memory. It's kind of a mold using which objects with body / state are made.

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

_{Like Discuss Correct / Improve class object class vs object Asked in 4 Companies basic frequent}

Q1441. Explain dot(.) operator ?

Core Java

Ans. Its used to access the object properties using the object reference or class properties using the Class Name. Moreover its used to access the classes and Interfaces of a package.

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

_{Like Discuss Correct / Improve operators}

Q1442. How should we handle errors while writing or accessing Stored Procedures?

Database

Ans. Store Procedure returns the error code. Moreover we can put the call withing try block and catch SQL Exception.

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

_{Like Discuss Correct / Improve stored procedure exception handling}

Q1443. Does Java supports Default arguments ?

Core Java

Ans. No

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

_{Like Discuss Correct / Improve}

Q1444. Can we have only try block in java ?

Core Java

Ans. No, It should be followed by either catch or finally.

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

_{Like Discuss Correct / Improve try exception handling}

Q1445. What is memory leak ? How Java helps countering memory leaks compared to C++ ?

Core Java

Ans. Memory Leak is a situation wherein we have a reserved memory location but the program has lost its reference and hence has no way to access it.

Java doesn't have concept of Pointers, Moreover Java has concept of Garbage collection that frees up space in heap that has lost its references.

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

_{Like Discuss Correct / Improve memory leak garbage collection intermediate frequent}

Q1446. Write an algorithm / java program for Heap Sort ?

Algorithm

Ans. https://www.geeksforgeeks.org/heap-sort/

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

_{Like Discuss Correct / Improve sorting heap sort Asked in 1 Companies frequent}

Q1447. What are the similarities and differences between Scala and Java ?

Scala

Ans. Similarities - Both and Object Oriented and Statically typed languages that runs on JVM.

Difference - Unlike Java, Scala is a Pure Object Oriented language as it doesn't use primitives and static variables.Unlike Java 8 which supports some functional programming concepts, Scala provides support for all functional programming concepts. Java 8 does not support Pattern Matching, Function Currying etc

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

_{Like Discuss Correct / Improve}

Q1448. What is Scala ?

Scala

Ans. Scala is a general purpose programming language that runs on JVM. Its completely inter operable with Java, purely object oriented and has full support for functional programming and a strong static type system.

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

_{Like Discuss Correct / Improve}

Q1449. Does Scala code compile to be Java Byte Code ?

Scala

Ans. Yes, that's the reason Scala code is inter operable with Java and they run smoothly with each other in JVM.

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

_{Like Discuss Correct / Improve}

Q1450. What are some advantages of Scala ?

Scala

Ans. Scala code is more concise and hence easy to read and maintain. It supports all features of functional programming and provide a pure object oriented way of application creation. It is ideal for creating all scales of applications. It is inter operable with Java code and hence can import / use Java libraries and frameworks.

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

_{Like Discuss Correct / Improve}

Search Interview Questions

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