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| Interview Questions and Answers for 'A9.com' - 5 question(s) found - Order By Newest | ||||
 Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. Frequently asked in HCL Technologies, TCS and Accenture. | ||||
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| 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 | ||||
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 Discuss Correct / Improve  java oops final finally finalize final vs finally vs finalize  Asked in 61 Companies  basic  frequent | ||||
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| Frequently asked in Cognizant ( Based on 2 feedback ) | ||||
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| Ans. Inner join is the intersection of two tables on the condition defined by the where clause i.e will get records from both tables matched by a column. Outer join is the union of two tables i.e will get all records from both tables and will put null in the columns where related records are not present. Left Outer join is the left union of two tables i.e all records from the table on the left and values from the right table for related records else null for the columns from right table. Right Outer join is the right union of two tables i.e all records from the table on the right and values from the left table for related records else null for the columns from left table. | ||||
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| Discuss Correct / Improve sql inner join outer join right join left join Asked in 24 Companies basic frequent | ||||
| Frequently asked to fresh graduates. | ||||
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| Ans. ACID stands for Atomicity, Consistency, Isolation, Durability is a set of properties of database transactions. Atomicity means all or nothing. i.e parts of a transaction shouldn't commit if any one of them fails. Either the whole transaction should succeed or it should be complete rollback. Consistency means that any transaction should lead database from one stabe state to another. Isolation means that the execution of transaction results in a system state that would be obtained if transactions were executed serially. Durability means that when a transaction is committed it forms the permanent state of database. | ||||
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| Discuss Correct / Improve database acid Asked in 7 Companies Intermediate | ||||
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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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| Discuss Correct / Improve string code coding Asked in 9 Companies | ||||
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| Ans. A media access control address is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. | ||||
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| Discuss Correct / Improve Asked in 1 Companies basic | ||||
Which of the following is wrong for final instance variables ?
