Archive for August 2018

The integration of the ___ file system with existing ____ file system management services provides automated file system management capabilities that might not be available on other ____ platforms.

The integration of the ___ file system with existing ____ file system management services provides automated file system management capabilities that might not be available on other ____ platforms.



Answer: The integration of the zFS file system with existing z/OS file system management services provides automated file system management capabilities that might not be available on other UNIX platforms

The ___ data set that contains the UNIX file system is a ____ data set type (a VSAM linear data set). ___ data sets and ____ data sets can reside on the same DASD volume. ____ provides commands for managing ___ space utilization.

The ___ data set that contains the UNIX file system is a ____ data set type (a VSAM linear data set). ___ data sets and ____ data sets can reside on the same DASD volume. ____ provides commands for managing ___ space utilization.



Answer: The zFS data set that contains the UNIX file system is a z/OS data set type (a VSAM linear data set). zFS data sets and z/OS data sets can reside on the same DASD volume. z/OS provides commands for managing zFS space utilization.

A fully qualified file name, which consists of the name of each directory in the path to a file plus the file name itself, can be up to ____ bytes long.

A fully qualified file name, which consists of the name of each directory in the path to a file plus the file name itself, can be up to ____ bytes long.



Answer: A fully qualified file name, which consists of the name of each directory in the path to a file plus the file name itself, can be up to 1023 bytes long.

What are the file system types in z/OS UNIX?

What are the file system types in z/OS UNIX?



Answer:

(1) System z File System (zFS)

(2) Hierarchical file system (HFS)

(3) z/OS Network File System (z/OS NFS)

(4) Temorary File System (TFS)

_______ allows z/OS users to create UNIX file systems and file system directory trees on z/OS, and to access UNIX files on z/OS and other systems.

_______ allows z/OS users to create UNIX file systems and file system directory trees on z/OS, and to access UNIX files on z/OS and other systems.




Answer: z/OS UNIX System Services allows z/OS users to create UNIX file systems and file system directory trees on z/OS, and to access UNIX files on z/OS and other systems

What main tasks does Data Management encompass?

What main tasks does Data Management encompass?



(1) Sets aside (allocates) space on DASD volumes

(2) Automatically retrieves cataloged data sets by name

(3) Mounts magnetic tape volumes in the drive

(4) Establishes a logical connection between the application program and the medium

(5) Controls Access to Data

(6) Transfers data between the application program and the medium


What does the System Catalog provide?

What does the System Catalog provide?



(1) Unit Device Type

(2) Volume Name for any data set

(3) Simple look up function

Advantages of PDS for z/OS users.

Advantages of PDS for z/OS users.



(1) Grouping of related data sets under a single name makes z/OS data
management easier. Files stored as members of a PDS can be processed either individually or all the members can be processed as a unit.

(2) Because the space allocated for z/OS data sets always starts at a track boundary on disk, using a PDS is a way to store more than one small data set on a track. This saves you disk space if you have many data sets that are much smaller than a track. A track is 56,664 bytes for a 3390 disk device.

(3) Members of a PDS can be used as sequential data sets, and they can be
appended (or concatenated) to sequential data sets.

(4) Multiple PDS data sets can be concatenated to form large libraries.

(5) PDS data sets are easy to create with JCL or ISPF; they are easy to manipulate with ISPF utilities or TSO commands.

In a VB data set, the records can have different lengths. The first four bytes of each record contain the ___, and the first two bytes of the ___ contain the ___

In a VB data set, the records can have different lengths. The first four bytes of each record contain the ___, and the first two bytes of the ___ contain the ___



Answer: In a VB data set, the records can have different lengths. The first four bytes of each record contain the RDW, and the first two bytes of the RDW contain the length of that record (in binary)

Reading or writing __________ ______ is faster than reading or writing tracks _________ ____ ___ ____, as might be the case if tracks were allocated dynamically.

Reading or writing __________ ______ is faster than reading or writing tracks _________ ____ ___ ____, as might be the case if tracks were allocated dynamically.



Answer: Reading or writing contiguous tracks is faster than reading or writing tracks scattered over the disk, as might be the case if tracks were allocated dynamically.

Each block of data on a DASD volume has a distinct location and a ______ _______, thus making it possible to find any block without extensive searching. _______ _______ can be stored and retrieved either ________ or ____________.

Each block of data on a DASD volume has a distinct location and a ______ _______, thus making it possible to find any block without extensive searching. _______ _______ can be stored and retrieved either ________ or ____________.



Answer: Each block of data on a DASD volume has a distinct location and a unique address, thus making it possible to find any block without extensive searching. Logical records can be stored and retrieved either directly or sequentially.

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