Articles in the Mainframe Category
VSAM »
value, and its datatype depends on whatever variable we’re changing.
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IBM, Mainframe »
SECTION 3
Choose the correct answer:
1)   Which VSAM clusters support only fixed length records?                                                  (b)
a)   LDS
b)   RRDS
c)    ESDS
d)   KSDS
2)   FREESPACE can be specified for which type of cluster?                                                  (d)
a)   LDS
b)   RRDS
c)    ESDS
d)   KSDS
3)   In which cluster type are records added at the end of the data set?                                 (c)
a)   LDS
b)   RRDS
c)    ESDS
d)   KSDS
4)   The types of processing supported by RRDS are                                                                 (e)
a)   sequential
b)   skip-sequential
c)    direct
d)   a and b
e)    a, b and c
5)   The types …
IBM, Mainframe »
SECTION 2
State whether True or False:
1.    All VSAM data sets reside on DASD devices.                                                                       (T)
2.    Whenever a record is retrieved from DASD, the entire CA containing it is read into VSAM buffer.                          (F)
3.    A LDS has no control information embedded in its CIs.                                                    (T)
4.    In an RRDS, the position of a data record can be changed.                                                              (F)
5.    Records from an ESDS can either be accessed sequentially or by RBA.                        (T)
6.    Deletions and updating of records is possible in ESDS.                                                       (F)
7.    Spanned records can only be used in ESDS or …
IBM, Mainframe »
SECTION 1
Fill in the blanks:
1.    A logical record is a unit of information used to store data in a VSAM data set.
2.    A CI is a unit of information that VSAM transfers between virtual storage and disk storage.
3.    The minimum size of a CI is 512 bytes.
4.    512 bytes is the minimum size of a CI.
5.    The maximum size of a CI is 32K.
6.    A CI consists of Logical Records, Free Space and Control Information.
7.    A Control Interval Definition Field (CIDF) is of 4 Bytes long.
8.    A Record Definition …
VSAM »
No, they would not be left empty. one record will be written in each CI and 1 CI will be written for each ca.
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VSAM »
By USING RBA(Relative Byte Address).
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VSAM »
FREE SPACE(FPSC)
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