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| Interview Questions and Answers for 'Intuit' - 6 question(s) found - Order By Rating | ||||
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| Ans. StringBuilder str = new StringBuilder("Pizza"); int size = str.length(); str = str.replace(size-1, size, "u"); System.out.println("After replace, str = " str); // prints Pizzu | ||||
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| Ans. Both are creational design patterns but singleton facilitates in creation and reuse of single object whereas Factory deals with creation of multiple objects. | ||||
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| Discuss Correct / Improve Design pattern singleton factory singleton vs factory Asked in 4 Companies | ||||
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| Ans. Polymorphism means the condition of occurring in several different forms. Polymorphism in Java is achieved in two manners 1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas 2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding. | ||||
 Sample Code for overloading Sample Code for overriding | ||||
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Discuss Correct / Improve polymorphism object oriented programming (oops) oops concepts oops concepts Asked in 108 Companies  Basic  frequent | ||||
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| Advanced level question. Frequently asked in High end product companies. Frequently asked in Google , Cognizant and Deloitte ( Based on 2 feedback ) | ||||
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| Ans. 1. String Pool - When a string is created and if it exists in the pool, the reference of the existing string will be returned instead of creating a new object. If string is not immutable, changing the string with one reference will lead to the wrong value for the other references. Example - String str1 = "String1"; String str2 = "String1"; // It doesn't create a new String and rather reuses the string literal from pool // Now both str1 and str2 pointing to same string object in pool, changing str1 will change it for str2 too 2. To Cache its Hashcode - If string is not immutable, One can change its hashcode and hence it's not fit to be cached. 3. Security - String is widely used as parameter for many java classes, e.g. network connection, opening files, etc. Making it mutable might possess threats due to interception by the other code segment. | ||||
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| Discuss Correct / Improve java oops string string class immutable immutability advanced Asked in 39 Companies expert frequent | ||||
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| Ans. Java does not support pointers. Java does not support multiple inheritances. Java does not support destructors but rather adds a finalize() method. Finalize methods are invoked by the garbage collector prior to reclaiming the memory occupied by the object, which has the finalize() method. Java does not include structures or unions because the traditional data structures are implemented as an object oriented framework. C++ compiles to machine language , when Java compiles to byte code . In C++ the programmer needs to worry about freeing the allocated memory , where in Java the Garbage Collector takes care of the the unneeded / unused variables. Java is platform independent language but c++ is depends upon operating system. Java uses compiler and interpreter both and in c++ their is only compiler. C++ supports operator overloading whereas Java doesn't. Internet support is built-in Java but not in C++. However c++ has support for socket programming which can be used. Java does not support header file, include library files just like C++ .Java use import to include different Classes and methods. There is no goto statement in Java. There is no scope resolution operator :: in Java. It has . using which we can qualify classes with the namespace they came from. Java is pass by value whereas C++ is both pass by value and pass by reference. Java Enums are objects instead of int values in C++ C++ programs runs as native executable machine code for the target and hence more near to hardware whereas Java program runs in a virtual machine. C++ was designed mainly for systems programming, extending the C programming language whereas Java was created initially to support network computing. C++ allows low-level addressing of data. You can manipulate machine addresses to look at anything you want. Java access is controlled. C++ has several addressing operators . * & -> where Java has only one: the . We can create our own package in Java(set of classes) but not in c and c++. | ||||
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| Discuss Correct / Improve java c++ difference between java and c++ programming concepts programming languages architecture technical architect technical lead Asked in 1 Companies | ||||
| Advanced level question frequently asked in US based companies. Recently asked in EMC and Intuit. | ||||
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| Ans. Simplest implementation we can have is a List wherein we can place ordered words and hence can perform Binary Search. Other implementation with better search performance is to use HashMap with key as first character of the word and value as a LinkedList. Further level up, we can have linked Hashmaps like , hashmap { a ( key ) -> hashmap (key-aa , value (hashmap(key-aaa,value) b ( key ) -> hashmap (key-ba , value (hashmap(key-baa,value) .................................................................................... z( key ) -> hashmap (key-za , value (hashmap(key-zaa,value) } upto n levels ( where n is the average size of the word in dictionary. | ||||
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| Discuss Correct / Improve java collections hashmap binary search search algorithm advanced architecture data structure Asked in 6 Companies frequent | ||||
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Static Polymorphic in Java is achieved through .. 
