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| Interview Questions and Answers for 'Xoriant' - 4 question(s) found - Order By Rating | ||||
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| Ans. class A { void test() { System.out.println("test() method"); } } class B { void test() { System.out.println("test() method"); } } Suppose if Java allows multiple inheritance like this, class C extends A, B { } A and B test() methods are inheriting to C class. So which test() method C class will take? As A & B class test() methods are different , So here we would Facing Ambiguity. | ||||
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 Discuss Correct / Improve  multiple inheritance object oriented programming (oops) oops concepts diamond problem  Asked in 20 Companies  basic  frequent | ||||
 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 | ||||
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| 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 | ||||
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| 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 | ||||
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| Ans. They are wrappers to primitive data types. They allow us to access primitives as objects. | ||||
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| Discuss Correct / Improve java data types wrapper classes Asked in 3 Companies basic frequent | ||||
| Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc ) | ||||
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| 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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| Discuss Correct / Improve design patterns ioc ( Inversion of Control ) dependency injection Asked in 83 Companies intermediate frequent | ||||
Which of the following statement is not true ?
