- How do I instantiate a bean whose constructor accepts parameters using the useBean tag?
- Replacing Characters in a String?
- Searching a String?
- Connecting to a Database and Strings Handling?
- What is a transient variable?
- What is the difference between Serializalble and Externalizable interface?
- How many methods in the Externalizable interface?
- How many methods in the Serializable interface?
- How to make a class or a bean serializable?
- What is the serialization?
- What are synchronized methods and synchronized statements?
- What is synchronization and why is it important?
- What is the purpose of finalization?
- What classes of exceptions may be caught by a catch clause?
- What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy?
- What happens when a thread cannot acquire a lock on an object?
- What restrictions are placed on method overriding?
- What restrictions are placed on method overloading?
- How does multithreading take place on a computer with a single CPU?
- How is it possible for two String objects with identical values not to be equal under the == operator?
- How are this() and super() used with constructors?
- What class allows you to read objects directly from a stream?
- What is the ResourceBundle class?
- What interface must an object implement before it can be written to a stream as an object?
- What is Serialization and deserialization?
- What are the Object and Class classes used for?
- Can you write Java code for declaration of multiple inheritance in Java ?
- What do you mean by multiple inheritance in C++ ?
- Write the Java code to declare any constant (say gravitational constant) and to get its value.
- What are the disadvantages of using threads?
- Given two tables Student(SID, Name, Course) and Level(SID, level) write the SQL statement to get the name and SID of the student who are taking course = 3 and at freshman level.
- What do you mean by virtual methods?
- What do you mean by static methods?
- What do mean by polymorphism, inheritance, encapsulation?
- What are the advantages of OOPL?
- How many methods do u implement if implement the Serializable Interface?
- Are there any other 'marker' interfaces?
- What is the difference between instanceof and isInstance?
- Why do you create interfaces, and when MUST you use one?
- What's the difference between the == operator and the equals() method? What test does Object.equals() use, and why?
- Discuss the differences between creating a new class, extending a class and implementing an interface; and when each would be appropriate.
- Given a text file, input.txt, provide the statement required
- Name four methods every Java class will have.
- What does the "abstract" keyword mean in front of a method? A class?
- Does Java have destructors?
- Are constructors inherited? Can a subclass call the parent's class constructor? When?
- What synchronization constructs does Java provide? How do they work?
- Why "bytecode"? Can you reverse-engineer the code from bytecode?
- Does Java have "goto"?
- What does the "final" keyword mean in front of a variable? A method? A class?
- Access specifiers: "public", "protected", "private", nothing?
- What is JDBC? Describe the steps needed to execute a SQL query using JDBC.
- What is RMI?
- What are native methods? How do you use them?
- What does the keyword "synchronize" mean in java. When do you use it? What are the disadvantages of synchronization?
- How many different types of JDBC drivers are present? Discuss them.
- What is the difference between a Vector and an Array. Discuss the advantages and disadvantages of both?
- Describe java's security model.
- Java says "write once, run anywhere". What are some ways this isn't quite true?
- What is the difference between an Applet and an Application?
- How can you force all derived classes to implement a method present in the base class?
- What are abstract classes, abstract methods?
- What's the difference between == and equals method?
- Describe, in general, how java's garbage collector works?
- What is the difference between StringBuffer and String class?
- How can you achieve Multiple Inheritance in Java?
- What are interfaces?
- What are the main differences between Java and C++?
- In Java, You can create a String object as: String str = "abc"; & String str = new String("abc"); Why cant a button object be created as : Button bt = "abc" Why is it compulsory to create a button object as: Button bt = new Button("abc"); Why is this not compulsory in String's case?
- Why are Java ARchive (JAR) files important?
- What is it reflection (introspection) ? Why is reflection possible in the Java language?
- How to make application thread-safe ?
- What is it object serialization?
- What do you know about networking support in Java?
- What you know about Corba implementation in Java?
- What is Java Beans?
- Compare SWING components to standard AWT.
- What is layout manager ? How does it work?
- What is the purpose of the toolkit in the Abstract Window Toolkit (AWT)? How does AWT work?
- What are the differences between Java & C++ in terms of its features?
- Is the ternary operator written x : y ? z or x ? y : z ?
- What is the List interface?
- What is the difference between an if statement and a switch statement?
- What are the problems faced by Java programmers who don't use layoutmanagers?
- What are the two basic ways in which classes that can be run as threads may be defined?
- What are synchronized methods and synchronized statements?
- Which Component subclass is used for drawing and painting?
- What methods are used to get and set the text label displayed by a Buttonobject?
- What method must be implemented by all threads?
- When is an object subject to garbage collection?
- Can an unreachable object become reachable again?
- How does a try statement determine which catch clause should be used tohandle an exception?
- What are the Object and Class classes used for?
- What modifiers may be used with a top-level class?
- What is a Java package and how is it used?
- What is the purpose of a statement block?
- What is the difference between the prefix and postfix forms of the ++ operator?
- Can try statements be nested?
- To what value is a variable of the boolean type automatically initialized?
- What is the difference between a public and a non-public class?
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