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51.

What Is The Biggest Disadvantage Of Using A Vsam Dataset?

Answer»

FREE SPACE ( FPSC )

FREE SPACE ( FPSC )
Discussion
52.

What Is The Device Independent Method To Indicate Where A Record Is Stored?

Answer»

By USING RBA (RELATIVE BYTE ADDRESS).

By USING RBA (Relative Byte Address).
Discussion
53.

How Many Times Secondary Space Allocated?

Answer»

122 TIMES

122 TIMES
Discussion
54.

What Is The Rrn For The First Record In Rrds?

Answer»

1

1
Discussion
55.

What Is A Base Cluste?

Answer»

The INDEX and DATA COMPONENTS of a KSDS.

The Index and data components of a KSDS.
Discussion
56.

If Fspc(100 100) Is Specified Does It Mean That Both The Control Interval And Control Area Will Be Left Empty Because 100 % Of Both Ci And Ca Are Specified To Be Empty?

Answer»

No, they would not be left empty. one RECORD will be WRITTEN in each CI and 1 CI will be written for each CA.

No, they would not be left empty. one record will be written in each CI and 1 CI will be written for each CA.
Discussion
57.

During Processing Of A Vsam File, Some System Error Occurs And It Is Subsequently Unusable .what Do You Do ?

Answer»

RUN VERIFY.

Run VERIFY.
Discussion
58.

Assuming That The Define Jcl Is Not Available, How Do You Get Info About A Vsam File's Organisation ?

Answer»

USE the LISTCAT COMMAND.

Use the LISTCAT command.
Discussion
59.

How Do You Define A Gdg ?

Answer»

Use the DEFINE GENERATIONDATAGROUP command. In the same IDCAMS step, another dataset must be DEFINED whose DCB parameters are used when new generations of the GDG are created. This dataset is known as the MODEL dataset. The ds name of this model dataset must be the same as that of the GDG, so use a disp of keep rather than catlg and also specify SPACE=(trk,0).

Use the DEFINE GENERATIONDATAGROUP command. In the same IDCAMS step, another dataset must be defined whose DCB parameters are used when new generations of the GDG are created. This dataset is known as the model dataset. The ds name of this model dataset must be the same as that of the GDG, so use a disp of keep rather than catlg and also specify space=(trk,0).
Discussion
60.

What Is The Maximum Size Of A Ci (control Interval)?

Answer»

32 KBYTES (32 * 1024* 8)

32 KBytes (32 * 1024* 8)
Discussion
61.

What Is The Length Of A Cidf?

Answer»

4 BYTES

4 Bytes
Discussion
62.

What Is The Length Of A Rdf?

Answer»

3 BYTES

3 Bytes
Discussion
63.

What Is The Maximum Record Length For The Vsam Dataset?

Answer»

MAX SIZE of a record in VSAM is CYLINDER = 2880 BYTES APPROX.

Max size of a record in VSAM is cylinder = 2880 bytes approx.
Discussion
64.

What Is Purpose Of Vsam?

Answer»

VSAM ACTS as an interface between Application program & Operating SYSTEM.

VSAM acts as an interface between Application program & Operating System.
Discussion
65.

What Are The Disadvantages Of Vsam?

Answer»
  • VSAM Datasets require more STORAGE SPACE compared to other TYPE of datasets due to Control information(CI) present in them.
  • VSAM can’t be stored in TAPE Volume i.e., VSAM Stored only in DASD.
  • VSAM is not a database like DB2, IMS DB & IDMS.
Discussion
66.

What Are The Advantages Of Vsam?

Answer»
  • Accessing the data is faster and EASIER.
  •  VSAM supports more DATASET types.
  • Supports variety of I/O Techniques.
  • Improves EFFICIENCY.
  • Records can be ACCESSED sequentially or randomly.
Discussion