Search Interview Questions |  More than 3000 questions in repository. There are more than 900 unanswered questions. Click here and help us by providing the answer. Have a video suggestion. Click Correct / Improve and please let us know. |
|
|||
|
| ||||
| Core java - Interview Questions and Answers for 'Antra' - 6 question(s) found - Order By Newest | ||||
 Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback ) and Epam Systems | ||||
| ||||
| Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory. x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object. Sample code: String x = new String("str"); String y = new String("str"); System.out.println(x == y); // prints false System.out.println(x.equals(y)); // prints true | ||||
 Sample Code for equals | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
 Discuss Correct / Improve  java string comparison string object class == equals object equality operator == vs equals equals vs ==  Asked in 294 Companies  basic  frequent | ||||
 Try 6 Question(s) Test | ||||
| Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. Frequently asked in HCL Technologies, TCS and Accenture. | ||||
| ||||
| Ans. final - constant variable, objects cannot be de-referenced, restricting method overriding, restricting class sub classing. finally - handles exception. The finally block is optional and provides a mechanism to clean up regardless of what happens within the try block. Use the finally block to close files or to release other system resources like database connections, statements etc. finalize() - method helps in garbage collection. A method that is invoked before an object is discarded by the garbage collector, allowing it to clean up its state. | ||||
| Sample Code for final Sample Code for finally Sample Code for finalize | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java oops final finally finalize final vs finally vs finalize Asked in 61 Companies basic frequent | ||||
| Try 4 Question(s) Test | ||||
| Very Frequently asked to fresh graduates and less experienced. Favorite question in Walk in drives. Frequently asked in Indian Services companies. | ||||
| ||||
| Ans. Overloading - Similar Signature but different definition , like function overloading. Overriding - Overriding the Definition of base class in the derived class. | ||||
| Sample Code for overloading Sample Code for overriding | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java oops overloading overriding oops concepts basic interview question overloading vs overriding Asked in 86 Companies basic frequent | ||||
| Try 1 Question(s) Test | ||||
| Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. | ||||
| ||||
| Ans. Its a method which cannot be overridden. Compiler throws an error if we try to override a method which has been declared final in the parent class. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java oops final final method Asked in 30 Companies basic frequent | ||||
| Try 1 Question(s) Test | ||||
| Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. | ||||
| ||||
| Ans. Final variable is a variable constant that cannot be changed after initialization. | ||||
| Sample Code for final variable | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve oops java final final variable basic interview question Asked in 12 Companies basic frequent | ||||
| Try 1 Question(s) Test | ||||
| ||||
| Ans. No | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve static final static final Asked in 1 Companies | ||||
Which of the following statement is not true ?
