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 'Visa inc' - 3 question(s) found - Order By Newest | ||||
| ||||
| Ans. Collections are re-sizable in nature. We can increase or decrease the size as per recruitment. Collections can hold both homogeneous and heterogeneous data's. Every collection follows some standard data structures. Collection provides many useful built in methods for traversing,sorting and search. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
 Discuss Correct / Improve  java collections collections classes advantages of collections over arrays collections vs arrays basic interview question  Asked in 6 Companies  basic  frequent | ||||
 Related Questions | ||||
 What are the Disadvantages of using Collection Classes over Arrays ? | ||||
| ||||
| Ans. A static initialization block is a normal block of code enclosed in braces, { }, and preceded by the static keyword. Here is an example: static { // whatever code is needed for initialization goes here } A class can have any number of static initialization blocks, and they can appear anywhere in the class body. The runtime system guarantees that static initialization blocks are called in the order that they appear in the source code. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java oops static static block Asked in 16 Companies basic frequent | ||||
| Related Questions | ||||
| How can we run a java program without making any object? | ||||
| How can we create objects if we make the constructor private ? | ||||
| Similarity and Difference between static block and static method ? | ||||
| Will the static block be executed in the following code ? Why ? | ||||
| Is it possible to compile and run a Java program without writing main( ) method? | ||||
| Will static block for Test Class execute in the following code ? | ||||
| Can we initialize member variables within static block ? | ||||
| How can we execute a Java class independently if it doesn't have a static main method ? | ||||
| Can we create object in static block ? | ||||
 Very Frequently asked. Favorite question in walkins and telephonic interviews. Usually among first few questions. Asked in different variants. Must know for intermediate and expert professionals.Among Top 10 frequently asked questions. | ||||
| ||||
| Ans. A Class must override the hashCode method if its overriding the equals method. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
| Discuss Correct / Improve java collections hashcode hash code equals collections Asked in 44 Companies intermediate frequent | ||||
 Try 1 Question(s) Test | ||||
| Related Questions | ||||
| Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object? | ||||
| Write a class and override the equals and hashcode method ? | ||||
| How many threads can access a concurrent hashmap when the hashcode is overridden and always returns a zero. | ||||
