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Important Oracle and Java Questions Frequently asked in Nagpur University Courses and IT Company's Interviews

Java Important Questions (Nagpur University)
  • What is Java
  • What is Hot Java
  • What is Hot Java
  • Different Operators used in Java
  • Short note on final and static keyword
  • Where super keyword is used.
  • What is Synchronization.
  • Garbage Collection. Method used for GC.
  • Exception Handling.try, catch, finally
  • Life cycle of Applet
  • Life cycle of Thread. Methods used in interthread communication.
  • Different streams used in Java
  • Difference between String and String Buffer
  • Different methods of String and String Buffer class
  • Difference between volatile and transient variables
  • Difference between class, abstract class and interface
  • Difference between Applet and Application
  • List different Wrapper Classes
  • Write Java program that copy data from one file to other byte by byte.
  • Write Java program that copy data from one file to other charecter by charecter
  • Write java program that takes data from command line and print from main method
  • Short note on Socket
  • Short note on Reserved Socket
  • Proxy Server
  • Tcp/Ip Server socket
  • Tcp/Ip Client socket
  • Factory method and Instance method of Inet address class
  • Domain Naming Service
  • Datagram
  • Java Important Questions (Interview)
  • What is Java
  • List Java versions
  • List Java editions
  • What are the principle concepts of OOPS?
  • What is Abstraction?
  • What is Encapsulation?
  • What is Inheritance?
  • What is Polymorphism?
  • How does Java implement polymorphism?
  • Explain the different forms of Polymorphism.
  • What is runtime polymorphism or dynamic method dispatch?
  • What is method overloading?
  • What is method overriding?
  • What is Class?
  • What is Object?
  • What is Constructor?
  • What are Access Specifiers?
  • What is super?
  • What is final?
  • What is static block?
  • How do you prevent a method from being overridden?
  • What is an Interface?
  • Can we instantiate an interface?
  • What is an abstract class?
  • Can we instantiate an abstract class?
  • When should I use abstract classes and when should I use interfaces?
  • What are the differences between method overloading and method overriding?
  • What is the difference between abstraction and encapsulation?
  • What are the differences between Contructors and Methods?
  • What are the differences between Interface and Abstract class?

  • Oracle Important Questions
  • What is Oracle
  • What is DBMS
  • What is RDBMS
  • What is ORDBMS
  • List different versions of Oracle
  • List different editions of Oracle
  • What is Sql
  • What is Pl/Sql
  • What is Cartesian Product
  • What is Consistant and In-Consistant Data
  • What is Set Operators
  • What are different type of Sql Statements
  • What is DDL
  • What is DML
  • What is TCS
  • What is QL
  • What is Constraint
  • List different type of Constraints
  • List important Oracle Built-In Functions
  • What is View
  • Can we do Dml operations on View
  • What is Sequence and where it is used
  • What is Index
  • What is Cluster
  • List Different type of Indexes
  • What is Flashback query
  • What is Hierarchical queries
  • What is Rollup and Cube
  • What is Pl/Sql
  • What is Cursor
  • What is Parametric Cursor
  • What is Sub Program
  • What is Stored Program
  • What is Package
  • What is Trigger
  • What is Autonomus Transaction


  • Central Institute of Information Technology - 2009