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Interview Questions and Answers for 'Symantec' - 48 question(s) found - Order By Newest | ||||
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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 260 Companies basic   frequent | ||||
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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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Like Discuss Correct / Improve  java   memory   memory management   stack memory   heap memory   code segment memory   advanced Asked in 9 Companies expert   frequent | ||||
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Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback) | ||||
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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. | ||||
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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 7 Companies expert   frequent | ||||
Frequently asked question for intermediate developers. Frequently asked in HCL Technologies and EPAM. | ||||
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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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Like Discuss Correct / Improve  java   oops   synchronization   volatile   java keywords Asked in 42 Companies intermediate   frequent | ||||
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Very frequently asked.Usually among first few questions. | ||||
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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 to fresh graduates. | ||||
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Ans. When two threads are waiting each other and cant precede the program is said to be deadlock. | ||||
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Like Discuss Correct / Improve  java   threads   multi threading   operating system   deadlock  concurrency Asked in 23 Companies basic   frequent | ||||
Frequently asked at HCL Technologies ( Based on 3 feedback ) | ||||
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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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Like Discuss Correct / Improve  java   exceptions   checked exceptions   unchecked exceptions   exception handling   checked vs unchecked exceptions Asked in 39 Companies basic   frequent | ||||
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Very frequently asked. Usually difference between String,StringBuffer and StringBuilder is asked in different variations. | ||||
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Ans. StringBuffer is synchronized whereas StringBuilder is not. | ||||
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Ans. Used to access members of the base class. | ||||
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Like Discuss Correct / Improve  java   oops   java keywords   super   basic interview question Asked in 2 Companies basic   frequent | ||||
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Ans. Java only provides pass by value. | ||||
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Like Discuss Correct / Improve  ebay   pass by value   pass by reference   method call   methods   functions   function call Asked in 10 Companies basic   frequent | ||||
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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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Ans. Yes, Cross-Site Request Forgery (CSRF) is an attack that forces an end user to execute unwanted actions on a web application in which they're currently authenticated. | ||||
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Like Discuss Correct / Improve  csrf attack  Cross-Site Request Forgery (CSRF) Asked in 16 Companies | ||||
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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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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. https://howtodoinjava.com/java/multi-threading/writing-a-deadlock-and-resolving-in-java/ | ||||
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Like Discuss Correct / Improve  multithreading  threads  deadlock Asked in 1 Companies intermediate | ||||
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Ans. By using Executor Framework , we can create Thread pool | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Symantec'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. We can enforce consistent UI and can have single point of change for UI components.' | ||||
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Ans. Possible Answer - I use either Firebug or Chrome Developer tool. | ||||
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Ans. Possible Answer - Yes, for debugging Javascript issues and fixing CSS and Html. | ||||
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Ans. Using class selector. | ||||
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