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| Interview Questions and Answers for 'Computer sciences corporation (csc) india' - 3 question(s) found - Order By Rating | ||||
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| Ans. Select Name from EMPLOYEE where ID in (Select ManagerEmployeeId from EMPLOYEE Group By ManagerEmployeeId order by count(Id) LIMIT 1) | ||||
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 Discuss Correct / Improve  database sql  Asked in 1 Companies | ||||
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| What is a self Join and give an example of a self Join ? or What is self Join and What is it's purpose ? | ||||
| Do you like Native SQL Apis like JDBC or JPA / Hibernate ? | ||||
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| Does SQL allow null values ? Can we use it within Where clause ? | ||||
| Write an SQL to find all records having all upper case alphanumeric characters in a field ? | ||||
 Frequently asked in Cognizant (CTS) | ||||
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| Ans. Storing the state of an object in a file or other medium is called serialization. Classes can communicate only if they are built together ( as they need Byte code for communication ). What if we need to enable communication between different applications ( i.e they have been built independently or even they reside at different locations ), We need a mechanism that will transfer the Bean state to a Medium than can be transferred to the receiving application. | ||||
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Discuss Correct / Improve java oops serialization Asked in 18 Companies  basic  frequent | ||||
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| Related Questions | ||||
| Can we declare static variables as transient ? | ||||
| Which elements of a class are ignored during serialization ? | ||||
| Can we serialize static variables ? | ||||
| What one should take care of, while serializing the object? | ||||
| What is the use of Transient Keyword ? | ||||
| serialization and deserialization of singleton class | ||||
| Difference between Serialization and Deserialization ? | ||||
| What is an Externalizable interface ? | ||||
| Difference between serializable and externalizable interface ? | ||||
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| Ans. The accessibility (public, protected, etc.) of the inner class is defined by the outer class. Just like top-level classes, an inner class can extend a class or can implement interfaces. Similarly, an inner class can be extended by other classes, and an inner interface can be implemented or extended by other classes or interfaces. An inner class can be declared final or abstract.Inner classes can have inner classes, but you will have a hard time reading or understanding such complex nesting of classes. | ||||
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| Discuss Correct / Improve java oops classes inner classes Asked in 2 Companies Basic frequent | ||||
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| Related Questions | ||||
| Why do we need Inner classes ? Cant we just work with outer classes wherever we implement Inner classes ? | ||||
| What is the difference between the following two code lines ? 1. new OuterClass().new InnerClass(); 2. new OuterClass.InnerClass(); | ||||
| What is the difference between inner class and sub class ? | ||||
| What are the different types of inner classes ? | ||||
| Which access specifier can be used with Class ? | ||||
| Difference between nested and inner classes ? | ||||
| Which of the following cannot be marked static ? | ||||
| Explain use of nested or inner classes ? | ||||
| What is the benefit of inner / nested classes ? | ||||
| Explain Static nested Classes ? | ||||
