(10) Why file handling is required? Explain.2 Explain following : (any – InterviewSolution

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1.	(10) Why file handling is required? Explain.2 Explain following : (any two)(a) Explain Macro substitution in detail.(b) Explain 2-dimensional integer array in detail.(c) Write a short note on structure
Answer» <p>a. Macro substitutionis a process where an identifier in a program is replaced by a predefined string composed of one or more tokens. The preprocessor accomplishes this task under the direction of #define statement. This statement, usually known as amacrodefinition takes the following form: #define identifier stringb. 2D array is organized as a matrix with a number of rows and columns.c. A structure type is the Name of a"grouping"of related pieces of "named" information about a single entity.</p>

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