C Language INTERVIEW QUESTION & ANSWERS
| 26. |
How can variables be characterized? |
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The variables can be categorized by storage class as well as by data type. The storage class specifies the portion of the program within which the variables are recognized. |
| 27. |
Give the rules for variable declaration? |
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The rules for variable declaration in C are given below :
- A variable name consists of alphabets, digits and the underscore (_) character
- The length of variable should be kept upto 8 characters though your system may allow upto 40 characters
- They must begin with an alphabet
- Some systems also recognize an underscore as the first character
- White space and commas are not allowed
- Any reserved word (keyword) cannot be used as a variable name.
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Posted by mathankumar. (Nov 21, 2013) |
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The length of variable should be kept upto 8 characters in ansi c. But other c softwares have allow upto 31 characters |
| 28. |
What is the purpose of type declarations? |
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The type declaration allow to create a synonym for other data types. Its syntax is typedef type identifier; The declaration typedef unsigned long int INTEGER |
| 29. |
What is recursion? |
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C language a function may call another function. When a function calls itself, it is referred to as recursive call and the process is known as recursion. C provides very good facilities for recursion. |
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Posted by Dastagirsab Bagwwan. (Oct 11, 2013) |
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Recursion is a technique which calls and recalls of interm of itself is called recursion. |
| 30. |
What is data types? |
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Data types refer to the classes of data that can be manipulated by C programs. The three fundamental data types supported by C are character, integer and real type. |
