Q1) What is the difference between PIC 9.99 and 9v99 ?
A1) PIC 9.99 is a FOUR-POSITION field that actually contains a decimal point where as PIC 9v99 is THREE- POSITION numeric field with implied or assumed decimal position.
Q2) What is the difference between SEARCH and SEARCH ALL ? What is more efficient ?
A2) SEARCH is a sequential search from the beginning of the table. SEARCH ALL is a binary search, continually dividing the table in two halves until a match is found. SEARCH ALL is more efficient for tables larger than 70 items.
Q3) What is the difference between static call & Dynamic call?
A3) In the case of Static call, the called program is a stand-alone program, it is an executable program. During run time we can call it in our called program. As about Dynamic call, the called program is not an executable program it can executed through the called program
Q4) What is the different between index and subscript ?
A4) Subscript refers to the array of occurrence , where as Index represents an occurrence of a table element. An index can only modified using perform, search & set. Need to have an index for a table in order to use SEARCH and SEARCH All.
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Sl #
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Subscript
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Index
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1
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Working Storage item
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Internal Item – No need to declare
it.
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2
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It means occurrence
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It means displacement
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3
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Occurrence, in turn translated to
displacement to access elements and so slower than INDEX access.
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Faster and efficient.
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4
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It can be used in any arithmetic
operations or for display.
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It cannot be used for arithmetic
operation or for display purpose.
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5
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Subscripts can be modified by any
arithmetic statement.
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INDEX can only be modified with
SET, SEARCH and PERFORM statements.
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