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C/C++ Java, Visual Basic Interview Questions (SQL, Oracle, Pro*C/C++)

    C/C++, Java, JDBC, Visual Basic Interview Questions (SQL, Oracle, Pro*C/C++) Programming

    C/C++ Interview Questions...

    • What is the output of printf("%d")
    • What will happen if I say delete this
    • What is Dangling pointer?
    • Difference between "C structure" and "C++ structure".
    • Diffrence between a "assignment operator" and a "copy constructor"
    • What is the difference between "overloading" and "overridding"?
    • Explain the need for "Virtual Destructor".
    • Can we have "Virtual Constructors"?
    • What are the different types of polymorphism?
    • What are Virtual Functions? How to implement virtual functions in "C"
    • What are the different types of Storage classes?
    • What is Namespace?
    • What are the types of STL containers?.
    • Is there any difference between a messageand method?
    • If I ask you to write 'VI' editor in C++ - How you'll proceed?
    • Difference between char name[] = “prashant n mhatre”; and char *name = “prashant n mhatre”;
    • Should we use global variables?
    • Parsing HTML or XML document with C++
    • What is 'self assignment'?

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    • Difference between how virtual and non-virtual member functions are called
    • Finding shortest path aka Dijkstra's algorithm and backtracking
    • Doing permutations and combinations in C++
    • Difference between "vector" and "array"?
    • How to write a program such that it will delete itself after exectution?
    • Can we generate a C++ source code from the binary file?
    • What are inline functions?
    • Talk sometiming about profiling?
    • How many lines of code you have written for a single program?
    • What is "strstream" ?
    • How to write Multithreaded applications using C++?
    • Explain "passing by value", "passing by pointer" and "passing by reference"
    • Write any small program that will compile in "C" but not in "C++"
    • Have you heard of "mutable" keyword?
    • What is a "RTTI"?
    • Is there something that I can do in C and not in C++?
    • Why preincrement operator is faster than postincrement?
    • What is the difference between "calloc" and "malloc"?
    • What will happen if I allocate memory using "new" and free it using "free" or allocate sing "calloc" and free it using "delete"?
    • What is Memory Alignment?
    • Explain working of printf.
    • Difference between "printf" and "sprintf".
    • What is "map" in STL?
    • When shall I use Multiple Inheritance?
    • What are the techniques you use for debugging?
    • How to reduce a final size of executable?
    • Give 2 examples of a code optimization.

    Java Interview Questions...

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    • Meaning - Abstract classes, abstract methods
    • How do you force Garbage Collector in Java?
    • Difference - Java,C++
    • Difference between == and equals method
    • Difference - Interface and Class
    • Explain Java security model
    • Explain working of Java Virtual Machine (JVM)
    • Difference : Java Beans, Servlets
    • Difference : AWT, Swing
    • Disadvantages of Java
    • difference between this() and super()
    • How does exeception handling mechanism work in Java?
    • When 'finally' block gets executed.
    • What is BYTE Code ?
    • Can unreachable object become reachable again?
    • What gives java it's "write once and run anywhere" nature?
    • Does Java have "goto"?
    • Difference - Preemptive Scheduling and Time Slicing
    • Checked and UnChecked Exception Difference
    • What is the meaning of "final" keyword?
    • Can I create final executable from Java?
    • Explain Garbage collection mechanism in Java
    • Why Java is not 100% pure object oriented language?
    • What are interfaces? or How to support multiple inhertance in Java?
    • How to use C++ code in Java Program?
    • Difference between "APPLET" and "APPLICATION"
    • Types of inner classes
    • Explain the difference between HashMap and HashTable?
    • Difference - Iterators in C++ and iterators in Java
    • What's meant by keyword 'static'
    • Different - public, private, protected and package level access
    • How would you strip HTML tags using String replaceAll() method.
    • Creating custom exceptions
    • What is super()
    • String and String Buffer - Which one should we prefer?
    • Adapter Class
    • Vector, Hashtables, Lists, Enumerations in Java
    • Serialization in Java and Marshelling
    • What are the types of JDBC drivers? Which would you prefer?
    • How do you establish connection to database using JDBC?
    • Convert Oracle CLOB to Java String
    • Convert Java String to Oracle CLOB
    • Difference: createStatement, prepareStatement and prepareCall
    • What is Transaction? How it is managed with JDBC
    • How can we make call to a stored procedure from JDBC ?
    • Dirty read and 2 phase commits
    • How do we retrieve table META Data ?
    • Java Programming Interview Questions - Java Interview Questions

    • Advanced Java Programming Interview Questions - A bit difficult interview questions

    Visual Basic Interview Questions

    • 3 main differences between flexgrid control and dbgrid control
    • ActiveX and Types of ActiveX Components in VB
    • Advantage of ActiveX Dll over Active Exe
    • Advantages of disconnected recordsets
    • Benefit of wrapping database calls into MTS transactions
    • Benefits of using MTS
    • Can database schema be changed with DAO, RDO or ADO?
    • Can you create a tabletype of recordset in Jet - connected ODBC database engine?
    • Constructors and distructors
    • Controls which do not have events
    • Default property of datacontrol
    • Define the scope of Public, Private, Friend procedures?
    • Describe Database Connection pooling relative to MTS
    • Describe: In of Process vs. Out of Process component. Which is faster?
    • Difference between a function and a subroutine, Dynaset and Snapshot,early and late binding, image and picture controls,Linked Object and Embedded Object,listbox and combo box,Listindex and Tab index, modal and moduless window, Object and Class,Query unload and unload in form, Declaration and Instantiation an object?
    • Draw and explain Sequence Modal of DAO
    • How can objects on different threads communicate with one another?
    • How can you force new objects to be created on new threads?
    • How does a DCOM component know where to instantiate itself?
    • How to register a component?
    • How to set a shortcut key for label?
    • Kind of components can be used as DCOM servers
    • Name of the control used to call a windows application
    • Name the four different cursor and locking types in ADO and describe them briefly
    • Need of zorder method, no of controls in form, Property used to add a menus at runtime, Property used to count number of items in a combobox,resize a label control according to your caption.
    • Return value of callback function, The need of tabindex property
    • Thread pool and management of threads within a thread pool
    • To set the command button for ESC, Which property needs to be changed?
    • Type Library and what is it's purpose?
    • Types of system controls, container objects, combo box
    • Under the ADO Command Object, what collection is responsible for input to stored procedures?
    • VB and Object Oriented Programming
    • What are the ADO objects? Explain them.
    • What are the different compatibility types when we create a COM component?
    • What do ByVal and ByRef mean and which is the default?
    • What does Option Explicit refer to?
    • What does the Implements statement do?
    • What is OLE and DDE? Explain.
    • What is the difference between Msgbox Statement and MsgboxQ function?
    • What keyword is associated with raising system level events in VB?
    • What methods are called from the ObjectContext object to inform MTS that the transaction was successful or unsuccessful?
    • What types of data access have you used.
    • What was introduced to Visual Basic to allow the use of Callback Functions?
    • Which controls can not be placed in MDI?
    • Which controls have refresh method, clear method
    • Which Property is used to compress a image in image control?
    • Which property of menu cannot be set at run time?
    • Which property of textbox cannot be changed at runtime and What's the maximum size of a textbox?
    • Which tool is used to configure the port range and protocols for DCOM communications?

    C/C++ Java JDBC Visual Basic Programming Interview Questions

    C/C++ Java Visual Basic Interview Questions


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