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Buffers:
The Modern computers are able of handling I-O operations independent of the CPU by means of the hardware termed as data channel.
For illustration, if two buffers are allocated for an input file, the IOCS can fill- in one buffer whereas the program processes the records already read and accessible in the other buffer.
RULES FOR INDEXED TABLES: The rules of indexing a table with an INDEXED phrase are as shown below: (1) If indexing is completed for any one level of a table, then indexing
PROGRAM FOR MOVE CORRESPONDING: We have to write a simple program to demonstrate Move Corresponding. identification division. program- id. environment division.
IF ... ELSE STATEMENT: We are familiar with an easy form of the IF statement. The common form of the IF statement is as shown below: Each of the statement-1 and statem
BLANK WHEN ZERO: BLANK WHEN ZERO is an editing clause that may be used along with a picture. This will set the whole data item to blanks of its value is equal to zero. Though,
Encryption and Decryption
we have input file ,record layout is EMP ID (6 char) , EMP NAME (20 char), Designation (3 char),Salary (5 digit) Base Branch (10char) Grade (3 Alphanumeric). This is the input file
Minus sign - edit characters for numeric data: The minus sign can appear either at the leftmost or rightmost location of the picture. If an item is negative, a minus sign will
RULES OF MOVE VERB: The Data movement is managed by the rules which are as shown below: (a) The contents of the identifier - 1 or the value of the literal - 1 is moved to
SEQUENTIAL FILES WITH THE VARIABLE-LENGTH RECORDS: The Magnetic - tape or disk files can hold variable-length records. In this situation the file can have records with various
Illustration of Subtract verb: (a) SUBTRACT A FROM B. This illustration means that the value of A will be subtracted from the value of B and the subtracted result will be s
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