QB-Unit 5

2 MARKS

1.      What is void pointer? How is it different from other pointers?

2.      Define double pointer with example.

3.      What is the full form and significance of EOF?

4.      Distinguish between #ifdef and #if directives.

5 MARKS

1.      What is the difference between call by value and call by reference? Write a program to swap two floating point numbers using call by reference method.

2.      What is a pointer? What are they required? With reference to pointer define the work of & operator? Write a program in ‘C’ using pointers to swap two numbers.

3.      Write a program to print out our array using the array notation and by dereferencing pointer.

4.      Explain with example defining and calling macros and conditional compilation.

5.      Write a simple C program to show the use of string handling functions.

6.      Describe the use and limitations of the functions getc() and putc(). Write a program in ‘C’ to read data from the keyboard, write it to a file called INPUT, again read the same data from INPUT file, and display it on the screen.

7.      What is a string? Write a program in ‘C’ that allows the user to enter a string and perform the following operations on it:

a.       Count number of characters in string

b.      Remove spaces in string

c.       Count number of words in it

8.      Explain the role of the C preprocessor. What is macro and what precautions one should take when using macros with arguments? What are the advantages of using macro definitions in a program? Give one example of using macro in a program.

9.      Write a program in ‘C’ to read data from keyboard, write it to a file named PASCO, again read the same data from the file PASCO and display number of characters, number of vowels and number of lines contained in it on the screen.

10.  Write a program in ‘C’ to create a list of ten elements using dynamic memory allocation and display the sorted list.