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Interview Questions and Answers for 'Process' - 28 question(s) found - Order By Newest

  Q1. Explain OOPs

or

Explain OOPs Principles

or

Explain OOPs Concepts

or

Explain OOPs features

or

Tell me something about OOPs
Core Java2017-06-13 08:25:45

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 236 Companies      basic        frequent


Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc )
  Q2. What is Dependency Injection or IOC ( Inversion of Control ) ?Design

Ans. It is a Design Pattern that facilitates loose coupling by sending the dependency information ( object references of dependent object ) while building the state of the object. Objects are designed in a manner where they receive instances of the objects from other pieces of code, instead of constructing them internally and hence provide better flexibility.

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   Like         Discuss         Correct / Improve     design patterns   ioc ( Inversion of Control )  dependency injection     Asked in 80 Companies      intermediate        frequent


 Q3. What is JAXP ?Xml
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Ans. Stands for Java API for XML Processing. This provides a common interface for creating and using SAX, DOM, and XSLT APIs in Java regardless of which vendor’s implementation is actually being used.

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   Like         Discuss         Correct / Improve     java   java api   xml   xml processing   jaxp   abbreviation   technologies


Frequently asked to fresh graduates.
 Q4. What are the difference between Threads and Processes ?Operating System
Anonymous
Ans. 1. when an OS wants to start running program it creates new process means a process is a program that is currently executing and every process has at least one thread running within it.
2). A thread is a path of code execution in the program, which has its own local variables, program counter(pointer to current execution being executed) and lifetime.
3. When the JavaVirtual Machine (JavaVM, or just VM) is started by the operating system, a new process is created. Within that process, many threads can be created.
4. Consider an example : when you open Microsoft word in your OS and you check your task manger then you can see this running program as a process. now when you write something in opened word document, then it performs more than one work at same time like it checks for the correct spelling, it formats the word you enter , so within that process ( word) , due to different path execution(thread) all different works are done at same time.
5. Within a process , every thread has independent path of execution but there may be situation where two threads can interfere with each other then concurrency and deadlock come is picture.
6. like two process can communicate ( ex:u open an word document and file explorer and on word document you drag and drop another another file from file explorer), same way two threads can also communicate with each other and communication with two threads is relatively low.
7. Every thread in java is created and controlled by unique object of java.lang.Thread class.
8. prior to jdk 1.5, there were lack in support of asynchronous programming in java, so in that case it was considered that thread makes the runtime environment asynchronous and allow different task to perform concurrently.

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   Like         Discuss         Correct / Improve     java   operating system   threads   processes     Asked in 2 Companies        frequent


 Q5. What are the phases of the JSP life cycle ?Java EE
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Ans. Translation of JSP PageCompilation of JSP PageClassloading (class file is loaded by the classloader)Instantiation (Object of the Generated Servlet is created).Initialization ( jspInit() method is invoked by the container).Reqeust processing ( _jspService() method is invoked by the container).Destroy ( jspDestroy() method is invoked by the container).

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   Like         Discuss         Correct / Improve     j2ee   servlets   servelets   web application   jsp   jsp life cycle   mindtree     Asked in 9 Companies


 Q6. Should good code be self-documenting, or is it the responsibility of the developer to document it?Process
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Ans. Open ended Questions.

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   Like         Discuss         Correct / Improve     java   open questions   code review   documentation


 Q7. What are use cases?Process
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Ans. It is part of the analysis of a program and describes a situation that a program might encounter and what behavior the program should exhibit in that circumstance.

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   Like         Discuss         Correct / Improve     use cases   design   high level design   testing   test driven development   software system analyst   project lead      basic        frequent


 Q8. How do you coordinate and communicate with the team developers ?Process
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Ans. We as a team of developers , testers , analyst , lead and architect sit close to each other. Most of the time I would just jump to their seat and talk to them ( if required ). We have daily stand up where we discuss things that needs team attention.

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   Like         Discuss         Correct / Improve     system software analyst   technical architect   technical lead   project lead   development lead


 Q9. How would you react if you understand that there have been business loss due to some problem with the software ?Process
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Ans. I will first try to find the problem that resulted in the loss and its magnitude. Will try to find the root cause, how long the bug is in production. In the meantime , will check with business how much loss this has resulted. Once the fix has been identified and urgency for the release has been identified, Will get necessary approvals for an emergency release and will try to deploy the fix in minimal possible time. After the release, Will schedule a meeting with team to do an RCA ( Root Cause Analysis ) and procedures that should be in place to avoid such mistakes.

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   Like         Discuss         Correct / Improve     software project lead   software project manager


 Q10. What is continuous integration ?Process

Ans. Continuous integration or CI is the practice, of merging all developer working copies to a shared mainline several times a day.

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   Like         Discuss         Correct / Improve     continuous integration   jenkins  hudson   build tools


 Q11. What are the phases in Software Testing process ?Process2016-10-17 12:03:16

Ans. Test Planning -> Test Design -> Test Execution -> Evaluating Exit Criteria and Closure

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 Q12. What is a Database Procedure ?Database2016-10-18 11:27:59

Ans. Stored procedures are a batch of SQL statements along with programming constructs ( if else, loops etc ) and stored as a single program that can be called by different clients and hence reused.

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   Like         Discuss         Correct / Improve     database  stored procedure     Asked in 1 Companies      basic        frequent


 Q13. Can there be a Thread without a Process ?Core Java2016-11-30 20:50:27

Ans. No.

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   Like         Discuss         Correct / Improve     Thread  Process     Asked in 1 Companies      Basic


 Q14. Explain Agile Software Development Methodology ?Process2016-11-30 16:00:02

Ans. https://en.wikipedia.org/wiki/Agile_software_development

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   Like         Discuss         Correct / Improve     software development process  agile     Asked in 5 Companies        frequent


 Q15. How would you process a 20 gb file with an application only having access to 4gb memory ?BigData2016-12-13 11:07:23

Ans. Load the file in chunks and then process. If we need to do analytic, we can process analytic information for those chunks and then reprocess the processed information from each chunk.

For example - we need to average all marks in the file. We can divide the file and load into 5 chunks and calculate average for each chunk. Then we can collect averages for all 5 chunks and then calculate the final average.

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   Like         Discuss         Correct / Improve     bigdata  processing big data     Asked in 1 Companies


 Q16. How should we handle errors while writing or accessing Stored Procedures?Database2017-01-19 13:55:55

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

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   Like         Discuss         Correct / Improve     stored procedure  exception handling


 Q17. What is archiving ?Process2017-01-23 12:54:07

Ans. It's the process of preserving the state of an object and then restoring it.

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 Q18. What is cascade or cascading delete ?Process2017-01-23 12:58:08

Ans. A deletion that triggers another deletion

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 Q19. What is ETL ?Process2017-02-02 14:46:33

Ans. ETL is Extract , Transform and Load. As the name suggest , it is the process of Data extraction , fabrication and then transfer to Database. Data Migration is one case of ETL.

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 Q20. Can you explain System Development Life Cycle or SDLC.Process2017-03-14 08:49:23

 This question was recently asked at 'The Bank of New York Mellon (BNY Mellon)'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     sdlc     Asked in 1 Companies


 Q21. What are the four situations that are required for deadlock to happen ?Operating System2017-05-07 16:38:57

Ans. mutual exclusion i.e the resource is not shareable and hence a process should have exclusive access to it at a particular time

Hold and Wait i.e the process doesn't release all existing resources held by it before requesting for another one.

No preemption i.e noone can forcefully release a resource held by another process and the process should voluntarily release the resource held by it.

Circular Wait - For ex, P1 is waiting on resource to be released by P2, P2 is waiting on resource to be released by P3 and P3 is waiting on the resource to be released by P1

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   Like         Discuss         Correct / Improve     deadlock  process


 Q22. What is the difference between latency, response time and processing time ?Web Service2017-06-02 12:49:11

Ans. Latency is the delay incurred while communicating a message i.e the time took the message in transit over network.

processing time is the delay it took for the server to process the request.

Response time is the sum total of latency and processing time.

For example -

Let's say it takes 1 ms for the request to reach from client to server and similar 1 ms for the response to come back to client. Moreover it takes approx 10 ms for the application to process the request. So The response time would be outward latency + processing time + inward latency = 12 ms

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   Like         Discuss         Correct / Improve     latency   response time    processing time


 Q23. Solve the producer and consumer problemOperating System2017-06-15 08:18:53

 This question was recently asked at 'Dell'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     producer consumer problem  multi-process synchronization problem     Asked in 1 Companies


 Q24. What is the difference between SDLC and Agile ?Process2017-08-28 19:37:08

Ans. Here are the differences between Agile and Waterfall Methodology:

The software development process is divided into different phases in the Waterfall model while Agile methodology segregates the project development lifecycle into sprints

Waterfall is a structured software development methodology, and often times can be quite rigid, whereas the Agile methodology is known for its flexibility

According to the Waterfall model, software development is to be completed as one single project, which is then divided into different phases, with each phase appearing only once during the SDLC. However, the Agile methodology can be considered as a collection of many different projects, which are nothing but the iterations of the different phases focusing on improving the overall software quality with feedback from users or the QA team

If you want to use the Waterfall model for software development, then you have to be clear with all the development requirements beforehand as there is no scope of changing the requirements once the project development starts. The Agile methodology, on the other hand, is quite flexible, and allows for changes to be made in the project development requirements even after the initial planning has been completed

All the project development phases such as designing, development, testing, etc. are completed once in the Waterfall model while as part of the Agile methodology, they follow an iterative development approach.

As a result, planning, development, prototyping and other software development phases can appear more than once during the entire SDLC One of the major differences between Agile and Waterfall development methodology is their individual approach towards quality and testing.

In the Waterfall model, the Testing phase comes after the Build phase, but, in the Agile methodology, testing is typically performed concurrently with programming or at least in the same iteration as programming

While Waterfall methodology is an internal process and does not require the participation of customers, the Agile software development approach focuses on customer satisfaction and thus, involves the participation of customers throughout the development phase

The Waterfall model can be regarded as a stringently sequential process, however, the Agile methodology is a highly collaborative software development process, thereby leading to better team input and faster problem solving

The Waterfall model is best suited for projects which have clearly defined requirements and in which change is not expected at all, while Agile development supports a process in which the requirements are expected to change and evolve. Thus, if you are planning to develop a software that would require frequent overhauls and has to keep up with the technology landscape and customer requirements, Agile is the best approach to follow

The Waterfall model exhibits a project mindset and lays its focus strictly on the completion of project development, while Agile introduces a product mindset that focuses on ensuring that the developed product satisfies its end customers, and changes itself as the requisites of customers change

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   Like         Discuss         Correct / Improve     sdlc  agile  adlc vs agile     Asked in 3 Companies


 Q25. What is the difference between Kan Ban and Agile ? Which one do you prefer ?Process2017-08-28 19:37:30

 This question was recently asked at 'Ancestry'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     kanban  agile  kanban vs agile     Asked in 1 Companies


 Q26. Explain debugging Process2018-01-20 12:17:15

 This question was recently asked at 'Adella software'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     debug     Asked in 1 Companies      basic


 Q27. What is Test driven development ?Process2018-03-29 19:16:07

 This question is still unanswered. Can you please provide an answer.


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 Q28. Do you think it's a good practice to perform releases from a branch and then merge code to the master ?SCM2018-07-25 11:06:16

Ans. We have followed this practice in one of the project. The only downside we felt was the need to merge the new snapshot version to master after the release.

The Benefit is that it's easy to just ignore the branch if complete rollback happens and hence master remains in sync with production.

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   Like         Discuss         Correct / Improve     source code management  scm  svn  git  release process




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