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'?
- 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.
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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 ?
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?
Computer Networking, Socket Programming, IPC Interview Questions
Networking, Socket Programming, Inter-Process Communication...
- User(s) are complaining of delays when using the network. What would you do?
- What are some of the problems associated with operating a switched LAN?
- Name some of the ways of combining TCP/IP traffic and SNA traffic over the same link.
- What sort of cabling is suitable for Fast Ethernet protocols?
- What is a Class D IP address?
- Why do I sometimes lose a server's address when using more than one server?
- What is Firewall?
- How do I monitor the activity of sockets?
- How would I put my socket in non-blocking mode?
- What are RAW sockets?
- What is the role of TCP protocol and IP protocol.
- What is UDP?
- How can I make my server a daemon?
- How should I choose a port number for my server?
- Layers in TCP/IP
- How can I be sure that a UDP message is received?
- How to get IP header of a UDP message
- Writing UDP/SOCK_DGRAM applications
- How many bytes in an IPX network address?
- What is the difference between MUTEX and Semaphore?
- What is priority inversion?
- Different Solutions to dining philosophers problem.
- What is a message queue?
- Questions on Shared Memory.
- What is DHCP?
- Working of ping, telnet, gopher.
- Can I connect two computers to internet using same line ?
- Working of TCP and SSL Handshake
- How P2P softwares work?
- Setting up TOMCAT web service
- Port numbers for FTP, HTTP, telnet, POP, finger
- Difference - Passive FTP, Active FTP
- Maximum Transmission Unit (MTU) what is it?
- Security threats due to use of CGI
- What is "spoofing"
- Where could you find Apache server web log
- Find web visitors by country
- What is Virtual Private Network (VPN) and how does it work?
- How does routing work?
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Object-Orientated Concepts, UML interview Questions
Object-Orientated Concepts, UML interview Questions...
- What is inheritance?
- Difference between Composition and Aggregation.
- Difference: Sequence Diagrams, Collaboration Diagrams.
- Difference: 'uses', 'extends', 'includes'
- What shall I go for Package Diagram?
- What is Polymorphism?
- Is class an Object? Is object a class?
- Comment: C++ "includes" behavior and java "imports"
- What do you mean by "Realization"?
- What is a Presistent, Transient Object?
- What is the use of Operator Overloading?
- Does UML guarantee project success?
- Difference: Activity Diagram and Sequence Diagram.
- What is association?
- How to resolve many to many relationship?
- How do you represent static members and abstract classes in Class Diagram?
- Can we use UML for user interface (UI) design?
- Every object has : state, behavior and identity - explain
- How to reverse engineer C++ code in UML?
- What are the tools you used for OOAD?
- Difference: Object Oriented Analysis (OOA) and Object Oriented Design (OOD)?
- What are the four phases of the Unified Process ?
- How do you convert uses cases into test cases?
- Explain Class Diagram in Detail.
- What are the Design Patterns you know.
- When do you prefer to use composition than aggregation?
- UML: IS it a process, method or notation?
- Does a concept HAVE to become a class in Design?
- What are the good practices to use while designing for reuse?
- Can you think of some nice examples where *multiple* actors are associated with a use case ?
- How to use CRC Cards for Class Design?
- What is the difference between static and dynamic Classificaition.Give some examples.
- Explian following terms: Constraint Rules, Design by contract.
- What is Object Constraint Language (OCL)?
- Difference Between Attribute and Association.
- What are associative classes?
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Operating Systems Unix, Windows, Linux Interview Questions
Operating Systems Unix, Windows, Linux Interview Questions...
- What is inheritance?
- Difference between Composition and Aggregation.
- Difference: Sequence Diagrams, Collaboration Diagrams.
- Difference: 'uses', 'extends', 'includes'
- What shall I go for Package Diagram?
- What is Polymorphism?
- Is class an Object? Is object a class?
- Comment: C++ "includes" behavior and java "imports"
- What do you mean by "Realization"?
- What is a Presistent, Transient Object?
- What is the use of Operator Overloading?
- Does UML guarantee project success?
- Difference: Activity Diagram and Sequence Diagram.
- What is association?
- How to resolve many to many relationship?
- How do you represent static members and abstract classes in Class Diagram?
- Can we use UML for user interface (UI) design?
- Every object has : state, behavior and identity - explain
- How to reverse engineer C++ code in UML?
- What are the tools you used for OOAD?
- Difference: Object Oriented Analysis (OOA) and Object Oriented Design (OOD)?
- What are the four phases of the Unified Process ?
- How do you convert uses cases into test cases?
- Explain Class Diagram in Detail.
- What are the Design Patterns you know.
- When do you prefer to use composition than aggregation?
- UML: IS it a process, method or notation?
- Does a concept HAVE to become a class in Design?
- What are the good practices to use while designing for reuse?
- Can you think of some nice examples where *multiple* actors are associated with a use case ?
- How to use CRC Cards for Class Design?
- What is the difference between static and dynamic Classificaition.Give some examples.
- Explian following terms: Constraint Rules, Design by contract.
- What is Object Constraint Language (OCL)?
- Difference Between Attribute and Association.
- What are associative classes?
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Web Technology (Internet) ASP, ASP.NET XML XSL Interview Questions
The World of WWW...
- What is HTTP? Explain its working?
- What is DNS?
- Why do I need a domain name like 'OneSmartClick.Com'?
- What happens when I type in some url and press enter?
- How does CGI work? Can I use 'C' language to write a CGI?
- Working of Proxy Server, Cookies, types of cookies?
- What is Firewall?
- How to redirect to another page?
- Some questions on web servers.
- What is DOM?
- Connection Pooling in IIS 3.0 and 4.0
- What is Code Base, Style Sheets?
- Need for CSS
- DHTML: Difference between FontSize and Font Size?
- Layers in TCP/IP
- Some sites work with "http://onesmartclick.com" but for some sites we need to specify "www" - like "http://www.onesmartclick.com". Why?
- Explain "URL Encoding",HTML "entity", GET method, POST method
- If we force XML for web design, the browzer size will reduce. How?
- How does DTD work?
- Difference between ASP and DHTML?
- How to create virtual directory in IIS?
- Can I host muliple sites on same machine?
- Administration of IIS.
- Some questions on ODBC and internet.
- XML and propritory databbases.
- Working of ping, telnet, gopher.
- Some questions about cross-browzer compatibility.
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ASP, ASP.NET interview questions...
- Why do we get the following errors: 80020009, 800A01F9, 800A03EC, 80010105, 80004005 ?
- Prevent ASP pages from caching
- Difference - ASP and ASP.NET
- Viewstate - Definition, formation and storage
- Working of output caching in ASP.NET
- Use of Web.configure in ASP.net with examples
- Difference - Server.Transfer and Response.Redirect. What should we prefer
- Difference - ADO Recordset and ADO.NET Dataset
- Using multiple security levels through secure login
- Turning off cookies for a page
- Create cookie for a month, permanant cookie
- Wrapping up call to web service
- Describe session handling in ASP
- Adding hyperlink column to the DataGrid
- Abandone session that is alreading running
- Difference - Boxing and unboxing
- Using SOAP call
- Reading XML data using ASP
XML / XSL Interview Questions...
- Difference - SAX parser and DOM parser
- Using Cascading style sheet (CSS) with XML data
- What is XML island?
- Character entities
- Getting XML into and out of database
- Using Oracle XML parser to load XML files
- Difference - Document Type Definition (DTD) and XML Schema
- Difference - SGML, HTML,XML,XHTML
- Will XML replace HTML eventually?
- Namespaces in XML
- Using JavaScript, ActiveX controls in XML document
- Accessing node values and attributes in XML document
- Use of CDATA tags
- Removing whitespace, selecting substring in XML document
- XML namespaces and DTDs
- Any 3 things XSLT can't do
- Uppercase to lowercase conversion
- What is XLINK
Java Interview Question
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Jdbc Interview Questions And Answers
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