May 26, 2010 Category : Careers & Training
Here are some of the FAQ's that can be asked in the technical
Move through Question Papers:-
1. What does static variable mean?
2. What is a pointer?
3. What is a structure?
4. What are the differences between structures and arrays?
5. In header files whether functions are declared or defined?
6. What are the differences between malloc() and calloc()?
7. What are macros? what are its advantages and disadvantages?
8. Difference between pass by reference and pass by value?
9. What is static identifier?
10.Where are the auto variables stored?
11.Where does global, static, local, register variables, free memory and C
Program instructions get stored?
12.Difference between arrays and linked list?
13.What are enumerations?
14.Describe about storage allocation and scope of global, extern, static,
local and register variables?
15.What are register variables? What are the advantage of using register
16.What is the use of typedef?
17.Can we specify variable field width in a scanf() format string? If
18.Out of fgets() and gets() which function is safe to use and why?
19.Difference between strdup and strcpy?
20.What is recursion?
21.Differentiate between a for loop and a while loop? What are it uses?
22.What are the different storage classes in C?
23.Write down the equivalent pointer expression for referring the same
24.What is difference between Structure and Unions?
25.What the advantages of using Unions?
26.What are the advantages of using pointers in a program?
27.What is the difference between Strings and Arrays?
28.In a header file whether functions are declared or defined?
29.What is a far pointer? where we use it?
30.How will you declare an array of three function pointers where each
function receives two ints and returns a float?
31.what is a NULL Pointer? Whether it is same as an uninitialized pointer?
32.What is a NULL Macro? What is the difference between a NULL Pointer
and a NULL Macro?
33.What does the error 'Null Pointer Assignment' mean and what causes
34.What is near, far and huge pointers? How many bytes are occupied by
35.How would you obtain segment and offset addresses from a far
address of a memory location?
36.Are the expressions arr and &arr same for an array of integers?
37.Does mentioning the array name gives the base address in all the
38.Explain one method to process an entire string as one unit?
39.What is the similarity between a Structure, Union and enumeration?
40.Can a Structure contain a Pointer to itself?
41.How can we check whether the contents of two structure variables are
same or not?
42.How are Structure passing and returning implemented by the
43.How can we read/write Structures from/to data files?
44.What is the difference between an enumeration and a set of preprocessor
45.what do the 'c' and 'v' in argc and argv stand for?
46.Are the variables argc and argv are local to main?
47.What is the maximum combined length of command line arguments
including the space between adjacent arguments?
48.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?
49.Does there exist any way to make the command line arguments
available to other functions without passing them as arguments to the
50.What are bit fields? What is the use of bit fields in a Structure
51.To which numbering system can the binary number
1101100100111100 be easily converted to?
52.Which bit wise operator is suitable for checking whether a particular bit
is on or off?
53.Which bit wise operator is suitable for turning off a particular bit in a
54.Which bit wise operator is suitable for putting on a particular bit in a
55.Which bit wise operator is suitable for checking whether a particular bit
is on or off?
56.which one is equivalent to multiplying by 2:Left shifting a number by 1
or Left shifting an unsigned int or char by 1?
57.Write a program to compare two strings without using the strcmp()
58.Write a program to concatenate two strings.
59.Write a program to interchange 2 variables without using the third
60.Write programs for String Reversal & Palindrome check
61.Write a program to find the Factorial of a number
62.Write a program to generate the Fibinocci Series
63.Write a program which employs Recursion
64.Write a program which uses Command Line Arguments
65.Write a program which uses functions like strcmp(), strcpy()? etc
66.What are the advantages of using typedef in a program?
67.How would you dynamically allocate a one-dimensional and twodimensional
array of integers?
68.How can you increase the size of a dynamically allocated array?
69.How can you increase the size of a statically allocated array?
70.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?
71.Which function should be used to free the memory allocated by
72.How much maximum can you allocate in a single call to malloc()?
73.Can you dynamically allocate arrays in expanded memory?
74.What is object file? How can you access object file?
75.Which header file should you include if you are to develop a function
which can accept variable number of arguments?
76.Can you write a function similar to printf()?
77.How can a called function determine the number of arguments that
have been passed to it?
78.Can there be at least some solution to determine the number of
arguments passed to a variable argument list function?
79.How do you declare the following:
o An array of three pointers to chars
o An array of three char pointers
o A pointer to array of three chars
o A pointer to function which receives an int pointer and returns a
o A pointer to a function which receives nothing and returns
80.What do the functions atoi(), itoa() and gcvt() do?
81.Does there exist any other function which can be used to convert an
integer or a float to a string?
82.How would you use qsort() function to sort an array of structures?
83.How would you use qsort() function to sort the name stored in an
array of pointers to string?
84.How would you use bsearch() function to search a name stored in
array of pointers to string?
85.How would you use the functions sin(), pow(), sqrt()?
86.How would you use the functions memcpy(), memset(), memmove()?
87.How would you use the functions fseek(), freed(), fwrite() and ftell()?
88.How would you obtain the current time and difference between two
89.How would you use the functions randomize() and random()?
90.How would you implement a substr() function that extracts a sub
string from a given string?
91.What is the difference between the functions rand(), random(), srand()
92.What is the difference between the functions memmove() and
93.How do you print a string on the printer?
94.Can you use the function fprintf() to display the output on the screen?
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