IBM大型机语言COBOL面试复习题库
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2011-09-28
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COBOL Interview Quesons
01. Name the divisions in a COBOL Program.
The four divisions in a COBOL Program are IDENTIFICATION DIVISION, ENVIRONMENT
DIVISION, DATA DIVISION and PROCEDURE DIVISION.
02. Tell us briefly about each division.#
IDENTIFICATION DIVISION is used to establish the Identity of the program, and assigns a
unique name to the Program.
ENVIRONMENT DIVISION tells the environment – SOURCE-COMPUTER and OBJECT-
COMPUTER on which the COBOL Program would run. It also declares the Input and Output
file-names, accessed by the COBOL Program.#
DATA DIVISION is the place in the COBOL Program, that creates Storage areas(COBOL
Variables) for storing Data. Generally, COBOL Programs read data-records from Input-File, or
Write records to Output-file. When the data-record from the Input-file is read, there's got to be
a place in the COBOL Program, where the Input File Data arrives, its received and it has to be
stored. COBOL Programs may do some rough-work. Such variables which act like a
temporary scratch-pad, where you could do some rough-work, and which are there only as
long as the COBOL Program runs are called WORKING-STORAGE Areas.
PROCEDURE DIVISION is the starting-point of the COBOL Program, where the Program
begins to run. You code the Instructions that you to perform one-by-one in the PROCEDURE
DIVISION.
03. What are the different data-types in COBOL?
Alpha-numeric (X), alphabetic (A) and numeric (9).
04. What does the INITIALIZE Verb do?
Alphabetic, Alpha-numeric fields and alpha-numeric edited items are initialized to SPACES.
Numeric and Numeric-edited items are set to ZEROES. FILLER and OCCURS Clause items
are left untouched.
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