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COMP 1081 TSO/ISPF Z/OS TEST QUESTIONS AND VERIFIED ANSWERS
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COMP 1081 TSO/ISPF Z/OS TEST QUESTIONS AND VERIFIED ANSWERS...
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COMP 1081 TSO/ISPF Z/OS TEST QUESTIONS ANDVERIFIED ANSWERS
Other names for Mainframe - ANSWER Big Iron, Enterprise Server,
Main Server, Server, IBM System Z, latest IBM is IBM z13
Commercial Databases - ANSWER Oracle, DB/2
Transaction servers - ANSWER CICS Applications, CICS or customer
information control system
Types of positions in mainframe - ANSWER Application Developer,
System Programmer,
System Administrator,
Production Control Analyst,
Operator,
Programmer Analyst,
Systems Analyst.
Mainframe History - ANSWER 1950's: Mainframe development started,
first generation IBM 705 followed by IBM 1401.
1960's: Third generation mainframe, Commercial or Scientific,
mainframe manufacturers began to standardize the hardware and
software they offered to customers.
2000's: z/9 z/10 z/13 series
Mainframe - ANSWER Supports thousands of applications,
Host many users ,
Input/output devices to simultaneously serve thousands of users, Central
data repository,
Primary hub,
Found in a corporation's data processing center,
Houses commercial databases, transaction server, and applications,
Linked to users through less powerful devices such as workstations or
terminals.
Mainframe two categories of workload - ANSWER Batch processing,
, Online Transaction processing
Mainframe points of interest - ANSWER MTBF 99.999% Mean Time
Between Failure,
Reduces SPOF Single Point of Failure,
Provides for CoD Capacity on Demand,
Reduces TCO Total Cost of Ownership.
Mainframes and first programming languages - ANSWER Assembler,
COBOL,
FORTRAN,
PL/1. Support for other languages:
Java,
C++,
Perl,
ReXX.
z/OS v2/R2 - ANSWER Latest version of z/OS. z/OS today is the result
of decades of technological advancement. Designed to offer, Stable,
Secure, Continuously available environment for applications running on
the mainframe.
early z/os - ANSWER The operating system
processed each request or job as a unit. It did not start the next job until
the one being processed had completed.
This arrangement worked well when a job could execute continuously
from start to completion.Problems with older O/S:
Jobs had to wait for information to be
read in from,
or written out to, a device such as a tape drive or printer.
Input and output (I/O) take a long time compared to the electronic speed
of the processor.
Jobs waited for I/O, the processor was idle (wasted time).
No multiprocessor or multitasking.
z/OS Multiprocessing / Multitasking - ANSWER Controlled by O/S:
Support for up to 64 engines in a single logical partition ,
Up to 1.0 terabyte (TB) of real memory per logical partition.
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