IT Interview Questions, Programming Interviews, Crack Interviews - (Indian IT Industry)

This is the outcome of experience in this field. The information is useful especially for freshers. Sample question papers for software companies are provided. I did not talk to anybody while preparing this page because there is nothing great about interviews. Take it easy...Be honest...polite...Don't try to pretend that you know everything...accept your mistakes ...Don't argue with interviews panel...I have seen many guys doing that...

Please don't send me mails asking for question papers of a particular company...or the answers of questions presented out here... Is it ethical to have a question paper before written exam?... it is upto you...I have nothing to say...

If you wish you can send your interview experience to share with us....Current Job scenario is pretty good... Make Hay While Sun Shines !...

Happy Job Hunting....

Basic Interview Preparation

The Ultimate Guide to Job Interview Preparation - Avoid Biggest Mistakes
How To Dress For An Interview: Dress For Success - Top tips for what to wear at an interview
Tough Interview Questions - from Monster.Com
Planet Papers - All kind of questions you are looking for
Tips For Resume Preparation - Something worth reading
Assesment Day - Numerical Reasoining, Verbal Reasoning, Interview Questions etc
50 Practice Interview Questions - Drill with these 50 questions and you'll be prepped to answer whatever an interviewer throws your way !!!

General Interview Puzzles

Earlier I'd thought of giving a lots of puzzles. Actually the sites given below have everything if you follow the links given out there correctly. You need to face puzzle solving only if you are fresher.

Interactive Mathematics Miscellany and Puzzles - Fully design in Java and JavaScript - Real Fun to Explore
Puzzles.COM - Not especially tailored for the interviews but good to explore
Free Puzzle collection - Geometry Puzzles, Logic Puzzles,Math Puzzles,Weight Puzzles etc.
Puzzles (My Favorite Page) - Superb
Puzzles, Mazes, and Quizzes - OK..
Puzzle Archive and Recent Puzzles - Not many puzzles but worth visiting
Interactive Fun Puzzles - Some Nice Collections
Easier Fibonacci puzzles - I like this page.

Programming Puzzles - Job Interview Puzzles

Some companies certainly ask for these things. Specially Microsoft. Here are my favorite puzzles. Don't send me emails asking for the solutions.

Write a "Hello World" program in 'C' without using a semicolon.
Write a C++ program without using any loop (if, for, while etc) to print numbers from 1 to 100 and 100 to 1;
C/C++ : Exchange two numbers without using a temporary variable.
C/C++ : Find if the given number is a power of 2.
C/C++ : Multiply x by 7 without using multiplication (*) operator.
C/C++ : Write a function in different ways that will return f(7) = 4 and f(4) = 7
Remove duplicates in array
Finding if there is any loop inside linked list.
Remove duplicates in an no key access database without using an array
Convert (integer) number in binary without loops.
Write a program whose printed output is an exact copy of the source. Needless to say, merely echoing the actual source file is not allowed.
From a 'pool' of numbers (four '1's, four '2's .... four '6's), each player selects a number and adds it to the total. Once a number is used, it must be removed from the pool. The winner is the person whose number makes the total equal 31 exactly.
Swap two numbers without using a third variable.
Given an array (group) of numbers write all the possible sub groups of this group.

Interview Articles

Some cool interview articles...

The Art of the Follow-Up After Job Interviews - by Kathryn Lee Bazan.
Behavioral Interviewing Strategies - by Katharine Hansen
Interviewing Do's and Don'ts, - by Randall S. Hansen
Mastering the On-Site Interview: A Guide to Company Visits - by Randall S. Hansen
Phone Interviewing Do's and Don'ts - Maureen Crawford Hentz
When Job-Hunting: Dress for Success - by Randall S. Hansen

Lateral Thinking Puzzles

There are not many puzzles on lateral thinking. My personal opinion...

Lateral thinking puzzle page - 20+ puzzles
The Lateral Puzzles Forum - Website devoted to lateral thinking puzzles.
Paul Sloane's list of Classic Lateral Thinking Puzzles - Same old stuff
Realistic Lateral Thinking Puzzles - Unbelievable...56 Puzzles?
Nicola's Lateral Thinking Puzzles - One More Surprise !!! 101 Puzzles

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.

Java Interview Questions...

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?

Object-Orientated Concepts, UML interview Questions

Object-Orientation 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?

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?

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.

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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**Database Interview Questions (SQL, Oracle, Pro*C/C++)**

SQL General Interview Questions ...

What are the different types of joins?
Explain normalization with examples.
What cursor type do you use to retrieve multiple recordsets?
Diffrence between a "where" clause and a "having" clause
What is the difference between "procedure" and "function"?
How will you copy the structure of a table without copying the data?
How to find out the database name from SQL*PLUS command prompt?
Tadeoffs with having indexes
Talk about "Exception Handling" in PL/SQL?
What is the diference between "NULL in C" and "NULL in Oracle?"
What is Pro*C? What is OCI?
Give some examples of Analytical functions.
What is the difference between "translate" and "replace"?
What is DYNAMIC SQL method 4?
How to remove duplicate records from a table?
What is the use of ANALYZing the tables?
How to run SQL script from a Unix Shell?
What is a "transaction"? Why are they necessary?
Explain Normalizationa dn Denormalization with examples.
When do you get contraint violtaion? What are the types of constraints?
How to convert RAW datatype into TEXT?
Difference - Primary Key and Aggregate Key
How functional dependency is related to database table design?
What is a "trigger"?
Why can a "group by" or "order by" clause be expensive to process?
What are "HINTS"? What is "index covering" of a query?
What is a VIEW? How to get script for a view?
What are the Large object types suported by Oracle?
What is SQL*Loader?
Difference between "VARCHAR" and "VARCHAR2" datatypes.
What is the difference among "dropping a table", "truncating a table" and "deleting all records" from a table.
Difference between "ORACLE" and "MICROSOFT ACCESS" databases.
How to create a database link ?

PL/SQL interview questions...

Normalize many to many relationships
Difference - Equijoin and union
What is TEMP table space in Oracle, what is rollback segment
How do we find row chaining?
Pattern matching operators
Features in oracle 9i and 10g
Why truncating table is faster than delete
copy commit syntax
Convert Zulu time zone to US Eastern time zone
Difference - union and union all
Difference - Group by, Order by clause
Which Ranking functions are available?
Difference - Decode, NVL, NVL2
Tradeoffs of using partitioned tables
How can we call stored procedure in SQL query
What are the restrictions on calling PL/SQL from SQL
Why EXISTS is preferable to distinct
Give 2 examples of avoiding unnecessary parsing.

Oracle Interview Question

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Saturday, December 16, 2006

Interviews Part 1