2. What is a Base Cluste?

The Index and data components of a KSDS

7. How many buffers are allotted to VSAM KSDS and ESDS?

2 data buffers by default for ESDS. For KSDS it allots 2 data buffers and 1 index buffers. each buffer is about 4K.

8. What is an alternate index and path?

An alternate index is an another way of accessing key sequenced data record stored in a base cluster and path is the linkage which connect alternate index to its base cluster.

9. Is a delete operation possible in an ESDS? B, is rewrite operation possible in ESDS?

No delete operation is not possible in VSAM ESDS.B. yes rewrite operation is possible in an ESDS.

10. What is the difference between LDS and ESDS?

There two datasets are VSAM datasets. ESDS maintains control information. But LDS does not maintains the control information.

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