Frequently Asked Questions set

How do you write a program which produces its own source code as its output?

How can I find the day of the week given the date?

Why doesn't C have nested functions?

What is the most efficient way to count the number of bits which are set in a value?

How can I convert integers to binary or hexadecimal?

How can I call a function, given its name as a string?

How do I access command-line arguments?

How can I return multiple values from a function?

How can I invoke another program from within a C program?

How can I access memory located at a certain address?

How can I allocate arrays or structures bigger than 64K?

How can I find out how much memory is available?

How can I read a directory in a C program?

How can I increase the allowable number of simultaneously open files?

What's wrong with the call "fopen("c:\newdir\file.dat", "r")"?

What is the output of printf("%d")

What will happen if I say delete this

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?.

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.

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?

What does static variable mean?

What is a pointer?

What is a structure?

What are the differences between structures and arrays?

In header files whether functions are declared or defined?

What are the differences between malloc() and calloc()?

What are macros? what are its advantages and disadvantages?

Difference between pass by reference and pass by value?

What is static identifier?

Where are the auto variables stored?

Where does global, static, local, register variables, free memory and C Program instructions get stored?

Difference between arrays and linked list?

What are enumerations?

Describe about storage allocation and scope of global, extern, static, local and register variables?

What are register variables? What are the advantage of using register variables?

What is the use of typedef?

Can we specify variable field width in a scanf() format string? If possible how?

Out of fgets() and gets() which function is safe to use and why?

Difference between strdup and strcpy?

What is recursion?

Differentiate between a for loop and a while loop? What are it uses?

What are the different storage classes in C?

Write down the equivalent pointer expression for referring the same element a[i][j][k][l]?

What is difference between Structure and Unions?

What the advantages of using Unions?

What are the advantages of using pointers in a program?

What is the difference between Strings and Arrays?

In a header file whether functions are declared or defined?

What is a far pointer? where we use it?

How will you declare an array of three function pointers where each function receives two ints and returns a float?

what is a NULL Pointer? Whether it is same as an uninitialized pointer?

What is a NULL Macro? What is the difference between a NULL Pointer and a NULL Macro?

What does the error 'Null Pointer Assignment' mean and what causes this error?

What is near, far and huge pointers? How many bytes are occupied by them?

How would you obtain segment and offset addresses from a far address of a memory location?

Are the expressions arr and &arr same for an array of integers?

Does mentioning the array name gives the base address in all the contexts?

Explain one method to process an entire string as one unit?

What is the similarity between a Structure, Union and enumeration?

Can a Structure contain a Pointer to itself?

How can we check whether the contents of two structure variables are same or not?

How are Structure passing and returning implemented by the complier?

How can we read/write Structures from/to data files?

What is the difference between an enumeration and a set of pre-processor # defines?

what do the 'c' and 'v' in argc and argv stand for?

Are the variables argc and argv are local to main?

What is the maximum combined length of command line arguments including the space between adjacent arguments?

If we want that any wildcard characters in the command line arguments should be appropriately expanded, are we required to make any special provision? If yes, which?

Does there exist any way to make the command line arguments available to other functions without passing them as arguments to the function?

What are bit fields? What is the use of bit fields in a Structure declaration?

To which numbering system can the binary number 1101100100111100 be easily converted to?

Which bit wise operator is suitable for checking whether a particular bit is on or off?

Which bit wise operator is suitable for turning off a particular bit in a number?

Which bit wise operator is suitable for putting on a particular bit in a number?

Which bit wise operator is suitable for checking whether a particular bit is on or off?

which one is equivalent to multiplying by 2:Left shifting a number by 1 or Left shifting an unsigned int or char by 1?

Write a program to compare two strings without using the strcmp() function.

Write a program to concatenate two strings.

Write a program to interchange 2 variables without using the third one.

Write programs for String Reversal & Palindrome check

Write a program to find the Factorial of a number

Write a program to generate the Fibinocci Series

Write a program which employs Recursion

Write a program which uses Command Line Arguments

Write a program which uses functions like strcmp(), strcpy()? etc

What are the advantages of using typedef in a program?

How would you dynamically allocate a one-dimensional and two-dimensional array of integers?

How can you increase the size of a dynamically allocated array?

How can you increase the size of a statically allocated array?

When reallocating memory if any other pointers point into the same piece of memory do you have to readjust these other pointers or do they get readjusted automatically?

Which function should be used to free the memory allocated by calloc()?

How much maximum can you allocate in a single call to malloc()?

Can you dynamically allocate arrays in expanded memory?

What is object file? How can you access object file?

Which header file should you include if you are to develop a function which can accept variable number of arguments?

Can you write a function similar to printf()?

How can a called function determine the number of arguments that have been passed to it?

Can there be at least some solution to determine the number of arguments passed to a variable argument list function?

How do you declare the following:

An array of three pointers to chars

An array of three char pointers

A pointer to array of three chars

A pointer to function which receives an int pointer and returns a float pointer

A pointer to a function which receives nothing and returns nothing

What do the functions atoi(), itoa() and gcvt() do?

Does there exist any other function which can be used to convert an integer or a float to a string?

How would you use qsort() function to sort an array of structures?

How would you use qsort() function to sort the name stored in an array of pointers to string?

How would you use bsearch() function to search a name stored in array of pointers to string?

How would you use the functions sin(), pow(), sqrt()?

How would you use the functions memcpy(), memset(), memmove()?

How would you use the functions fseek(), freed(), fwrite() and ftell()?

How would you obtain the current time and difference between two times?

How would you use the functions randomize() and random()?

How would you implement a substr() function that extracts a sub string from a given string?

What is the difference between the functions rand(), random(), srand() and randomize()?

What is the difference between the functions memmove() and memcpy()?

How do you print a string on the printer?

Can you use the function fprintf() to display the output on the screen?

What is an object?

What is the difference between an object and a class?

What is the difference between class and structure?

What is public, protected, private?

What are virtual functions?

What is friend function?

What is a scope resolution operator?

What do you mean by inheritance?

What is abstraction?

What is polymorphism? Explain with an example.

What is encapsulation?

What do you mean by binding of data and functions?

What is function overloading and operator overloading?

What is virtual class and friend class?

What do you mean by inline function?

What do you mean by public, private, protected and friendly?

When is an object created and what is its lifetime?

What do you mean by multiple inheritance and multilevel inheritance? Differentiate between them.

Difference between realloc() and free?

What is a template?

What are the main differences between procedure oriented languages and object oriented languages?

What is R T T I ?

What are generic functions and generic classes?

What is namespace?

What is the difference between pass by reference and pass by value?

Why do we use virtual functions?

What do you mean by pure virtual functions?

What are virtual classes?

Does c++ support multilevel and multiple inheritance?

What are the advantages of inheritance?

When is a memory allocated to a class?

What is the difference between declaration and definition?

What is virtual constructors/destructors?

In c++ there is only virtual destructors, no constructors. Why?

What is late bound function call and early bound function call? Differentiate.

How is exception handling carried out in c++?

When will a constructor executed?

What is Dynamic Polymorphism?

Write a macro for swapping integers.


Frequently Asked Questions - Operating System Concepts
What is MUTEX ?

What isthe difference between a 'thread' and a 'process'?

What is INODE?

Explain the working of Virtual Memory.

How does Windows NT supports Multitasking?

Explain the Unix Kernel.

What is Concurrency? Expain with example Deadlock and Starvation.

What are your solution strategies for "Dining Philosophers Problem" ?

Explain Memory Partitioning, Paging, Segmentation.

Explain Scheduling.

Operating System Security.

What is Semaphore?

Explain the following file systems : NTFS, Macintosh(HPFS), FAT .

What are the different process states?

What is Marshalling?

Define and explain COM?

What is Marshalling?

Difference - Loading and Linking ?

What are the basic functions of an operating system?

Explain briefly about, processor, assembler, compiler, loader, linker and the functions executed by them.

What are the difference phases of software development? Explain briefly?

Differentiate between RAM and ROM?

What is DRAM? In which form does it store data?

What is cache memory?

What is hard disk and what is its purpose?

Differentiate between Complier and Interpreter?

What are the different tasks of Lexical analysis?

What are the different functions of Syntax phase, Sheduler?

What are the main difference between Micro-Controller and Micro- Processor?

Describe different job scheduling in operating systems.

What is a Real-Time System ?

What is the difference between Hard and Soft real-time systems ?

What is a mission critical system ?

What is the important aspect of a real-time system ?

If two processes which shares same system memory and system clock in a distributed system, What is it called?

What is the state of the processor, when a process is waiting for some event to occur?

What do you mean by deadlock?

Explain the difference between microkernel and macro kernel.

Give an example of microkernel.

When would you choose bottom up methodology?

When would you choose top down methodology?

Write a small dc shell script to find number of FF in the design.

Why paging is used ?

Which is the best page replacement algorithm and Why? How much time is spent usually in each phases and why?

Difference between Primary storage and secondary storage?

What is multi tasking, multi programming, multi threading?

Difference between multi threading and multi tasking?

What is software life cycle?

Demand paging, page faults, replacement algorithms, thrashing, etc.

Explain about paged segmentation and segment paging

While running DOS on a PC, which command would be used to duplicate the entire diskette?

Frequently Asked Questions - Database Concepts
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 ?


Frequently Asked Questions - Networking Concepts
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 ?

Why networks are layered ? What is the advantage of that ?

How many layers are there in OSI ? Why is it called OSI model ?

network topologies ?

Which are the different network toplogies ?

an example of bus type network.

What is the Bandwidth of ethernet ?

Explain the advantage and disadvantage of ethernet ?

Which is the protocol used in ethernet. (CSMA/CD) Why is it called so ?

What is the advantage of Ring network ?

Compare it with ethernet.


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depper Technologies
1-10 Aptitude
11-20 Electronics total 40 que.
21-40 C Time : 45 min.
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1-5. its one puzzle type analitical que. i searched, but i didn't get it. its eazy. you can solve. like....
one selection process.....candidate must have degree minimum 60%.12th maths,physics,chem with 60%...not more then 22 year old on july 15 2004....in GD and interview 50%.
in about candidate
1. if one has complit PG then selecte by maneger.
2. if .......

6. thermomere for temperature then Baromere for ?
ans. pressure.
7.one train start at 7:12 am and reached at 10:57 am. the distanc given 180 miles. then we have to search for speed.
ans: 48.
8. one man rank 13th from upside and 13th from down side then how many member in group.
ans: 25.
9.one cube volume 8 . if its side is double then find new volume.
ans: 64.