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Interview Questions and Answers for 'Symantec' - 43 question(s) found - Order By Newest

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  Q1. Which are the different segments of memory ?Core Java
Anonymous
Ans. 1. Stack Segment - Contains primitives, Class / Interface names and references.

2. Heap Segment - Contains all created objects in runtime, objects only plus their object attributes (instance variables), Static variables are also stored in heap.

3. Code Segment - The segment where the actual compiled Java bytecodes resides when loaded

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  Q2. 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


Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)
  Q3. Describe, in general, how java's garbage collector works ?Core Java
Anonymous
Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.

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   Like         Discuss         Correct / Improve     java   garbage collection   java memory management   advanced     Asked in 21 Companies      intermediate        frequent

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Frequently asked to experienced developers. Recently asked in many US interviews.
  Q4. What is database deadlock ? How can we avoid them?Database
Admin
info@buggybread.com
Ans. When multiple external resources are trying to access the DB locks and runs into cyclic wait, it may makes the DB unresponsive.

Deadlock can be avoided using variety of measures, Few listed below -

Can make a queue wherein we can verify and order the request to DB.

Less use of cursors as they lock the tables for long time.

Keeping the transaction smaller.

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   Like         Discuss         Correct / Improve     java   database   architecture     Asked in 6 Companies      expert        frequent


Frequently asked to fresh graduates.
  Q5. What is a Deadlock ?Operating System
Anonymous
Ans. When two threads are waiting each other and cant precede the program is said to be deadlock.

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Very frequently asked.Usually among first few questions.
  Q6. What is MVC ? Design
Anonymous
Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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Frequently asked question for intermediate developers.
  Q7. What is Volatile keyword used for ?Core Java
Anonymous
Ans. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldnt be cached.

  Sample Code for volatile

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 Q8. What is "super" used for ?
Anonymous
Ans. Used to access members of the base class.

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Very frequently asked. Usually difference between String,StringBuffer and StringBuilder is asked in different variations.
  Q9. Difference between StringBuffer and StringBuilder ?Core Java
Anonymous
Ans. StringBuffer is synchronized whereas StringBuilder is not.

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Frequently asked at HCL Technologies ( Based on 3 feedback )
  Q10. Difference between Checked and Unchecked exceptions ?Core Java
Anonymous
Ans. Checked exceptions are the exceptions for which compiler throws an errors if they are not checked whereas unchecked exceptions are caught during run time only and hence can't be checked.

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 Q11. Write a program to print the index of the first non repeated character in a java stringCore Java2017-01-27 18:30:21

Ans. public class BuggyBread1{
public static void main (String args[]) {
   String str = "hheello world";
   char[] charArray = str.toCharArray();
   char selectedChar = 'a';
   for(char char1: charArray){
      if(!str.contains(Character.toString(char1).concat(Character.toString(char1)))){
         selectedChar = char1;
         break;
      }
   }
   System.out.println(str.indexOf(Character.toString(selectedChar)));
}
}

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   Like         Discuss         Correct / Improve     string  code  coding     Asked in 9 Companies


  Q12. How are values passed in Java ? By value or reference ?Core Java

Ans. Java only provides pass by value.

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 Q13. What Parameter we need to specify while creating sockets ?2018-02-08 13:21:14

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


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 Q14. how is the internal code for the "volatile" implemented ? Core Java2018-06-21 18:00:53

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   Like         Discuss         Correct / Improve     volatile     Asked in 1 Companies


 Q15. Design database schema for Facebook like application.Database2018-06-21 18:01:57

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 Q16. How Bitly shortens the URL ?Web2018-06-21 18:02:38

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   Like         Discuss         Correct / Improve     web application   url     Asked in 1 Companies        rare


 Q17. Write Java code that would cause deadlock ?Core Java2018-06-21 18:03:05

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


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 Q18. How would you design a Thread Pool ?Design2018-06-21 18:06:31

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 Q19. Suppose you have 8 balls, one of them is either have more/less weight, In how many least possible iterations would you find that ball? Design2018-06-21 18:08:10

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 Q20. Can you name few Java packages which you frequently used ?Core Java2018-06-26 19:15:06

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 Q21. Can you tell something about Web security ?Web2018-06-26 19:15:58

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 Q22. If we have width of an html element as 100px and a border of 10 px. What will be the effective width of the element ? Will the border start after 100 px or after 90 px ?Html2018-06-26 19:16:59

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


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 Q23. Can you create html and css for a rectangular shape button with width 10px.CSS2018-06-26 19:17:35

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 Q24. What is the difference between Java OR operator and Java script OR operator ?JavaScript2018-06-26 19:18:03

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 Q25. What are the advantages of using cascade style sheets or css ?CSS2018-06-26 19:19:12

Ans. We can enforce consistent UI and can have single point of change for UI components.'

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 Q26. How do you debug Javascript code ?JavaScript2018-06-26 19:20:13

Ans. Possible Answer - I use either Firebug or Chrome Developer tool.

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 Q27. Have you ever worked with Firebug ?Browser2018-06-26 19:20:31

Ans. Possible Answer - Yes, for debugging Javascript issues and fixing CSS and Html.

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 Q28. How can we assign common styling attributes to html tags and how can we do that across different tag types ? CSS2018-06-27 09:50:05

Ans. Using class selector.

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 Q29. How can we align a particular html element to the center using css ?CSS2018-06-27 09:50:36

Ans. By using attribute align:center

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 Q30. What is the doctype declaration at the top of html page ?Html2018-06-27 09:50:55

Ans. It is an instruction to the web browser about what version of HTML the page is written in, which specifies the rules for the markup language, so that the browsers render the content correctly.

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 Q31. In which way are you using dependency injection in Spring ? Annotation , Config or Class ?Spring2018-06-27 09:52:07

Ans. Possible Answer - We are using config file.

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 Q32. How does encoding affect using Reader / writer classes or Stream classes in Java ? Core Java2018-06-27 09:53:06

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


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 Q33. How many bytes a character takes with UTF-8 encoding ?Encoding2018-06-27 09:53:32

Ans. it takes 1 to 4 bytes

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 Q34. How executor service is better than using primitive Threading mechanism using Thread class or runnable Interface ?Core Java2018-06-27 09:55:08

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 Q35. Suppose we make an api call using multithreading, How would you design to make sure that we have received response for all threads before exiting the main thread ?Design2018-06-27 09:55:56

Ans. We can use HashMap for tracking response status for all threads. We can wait every n second by using Thread.sleep and exit the main thread only once we have received response for all threads.

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  Q36. Difference between == and === ?JavaScript2018-07-04 16:16:18

Ans. == compares values === is used in scripting languages for comparing two values as well as there data tpe. like in js,php.

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   Like         Discuss         Correct / Improve     ==  ===  == vs ===     Asked in 13 Companies      basic        frequent


 Q37. While working on a web application, you are informed that there is no new data in Database for last few hours ? How would you go about debugging this problem ?
Solution2018-07-11 10:49:52

Ans. Will look into access logs to see if web application is getting any traffic. If not , then will inform the server support team.

Will look into intermediary infrastructure , queues , streams etc to see if there is any choke or throttle there.

If there is any throttle at any point, would make request for either debugging the cause or increasing the infrastructure. For ex - increasing shards in Kinesis.

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 Q38. Have you worked on Linux Systems ?General2018-07-13 12:37:10

 This question was recently asked at 'HCL Technologies,Symantec'.This question is still unanswered. Can you please provide an answer.


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 Q39. What is OSGI ?2018-07-13 12:37:34

 This question was recently asked at 'Cerner,Symantec,Adobe,VMWare,Jcr Design Group,Pyramid IT,SEA Software,Amiti Consulting,Ameya Info Technologies,Highbrow Technologies,Coresecure,Analyst Infotech,Holland America,Twin Technologies,DiamondPick,Tanisha Systems,Cengage,Blue Coat,Coxit,LionBridge Technologies,Intersources Inc,Pavlov Media,HumanMinds'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 23 Companies


  Q40. What are the types of authentication used in Web services ?Web Service2018-07-14 11:02:27

Ans. Encrypted User Name / Password
Encrypted Password within Cookie
Encrypted Tokens
IP
Client Certificates
Oauth

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   Like         Discuss         Correct / Improve     authentication  security  web service     Asked in 12 Companies      basic        frequent


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