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IBM Mainframe Systems Operator Level I Certificate 2.5 (V2) > Managing and Processing z/OS Data > Flashcards

Managing and Processing z/OS Data Flashcards

1
Q

Name that acronym

I/O

A

Input/Output

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2
Q

Input/Output

A

Any communication between a computer and external devices

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3
Q

Name that acronym

CSS

A

Channel Subsystem

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4
Q

True or False, the channel subsystem is used by all mainframe-based operating systems?

A

True - This is used by all mainframe-based operating systems, including z/OS, Linux on IBM Z, and z/VSE.

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5
Q

Channel subsystem

A

The Channel Subsystem is separate from normal mainframe processing; with separate processors - CPUs called Special Assist Processors (SAPs) - and memory.

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6
Q

True or False

The channel subsystem can be seen by normal z/OS programs?

A

False - The Channel Subsystem cannot be seen by normal z/OS programs

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7
Q

True or False

The channel subsystem can be used by non-IO processes

A

False - It cannot be used for anything except I/O.

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8
Q

When would a channel subsystem be used?

A

If a z/OS task or process needs to perform I/O

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9
Q

How do channel subsystems connect to external systems?

A

Using channel cables

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10
Q

What type of channel cables to modern mainframes use?

A

FICON and IBM zHyperLink Express

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11
Q

Name that acronym

FICON

A

Fibre channel connection

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12
Q

IBM zHyperLink Express

A

Short distance connections

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13
Q

IBM zHyperLink Express - Max distance

A

492 feet, or 150 meters

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14
Q

IBM zHyperLink Express - Data rate

A

8GB/s

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15
Q

How many types of FICON channels are there?

A

Two

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16
Q

What are the FICON channel types?

A

CCW and Coupling Channels

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17
Q

What are coupling channels for?

A

To connect z/OS systems together or with a coupling facility

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18
Q

Name that acronym

CPC

A

Central processor complex

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19
Q

central processor complex

A

The mainframe ‘box’ that includes the physical collection of hardware

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20
Q

What is a CPC also known as?

A

Central electronics complex (CEC)

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21
Q

What must be done before an external device can be used with z/OS

A

It must be defined to both the channel subsystem and /zOS

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22
Q

What tool is used for adding an external device to z/OS

A

The hardware configuration dialogue (HCD)

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23
Q

Name that acronym

HCD

A

Hardware configuration dialogue

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24
Q

In what application can the HCD be found?

A

ISPF

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25
Q

True or false

Channel subsystems have dedicated memory?

A

True

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26
Q

True or False

All I/O processing is performed in control units, or controller, that are separate from the mainframe.

A

False

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27
Q

True or False

The channel subsystem uses the same CPU processors and memory as normal processing.

A

False

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28
Q

True or False

Once the channel subsystem has completed an I/O request, it interrupts normal processing so that the task requesting the I/O can continue.

A

True

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29
Q

True or False

All I/O processing is performed by the channel subsystem.

A

False

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30
Q

True or False

Today, control units and controllers are no longer separate equipment; they are included in the disk, tape, printer, and network subsystems.

A

True

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31
Q

Used to connect to an external tape subsystem

A

CCW

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32
Q

Used to connect to an external DASD subsystem

A

CCW

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33
Q

Used by z/OS to connect to another z/OS system on another CPC

A

Coupling

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34
Q

Used by z/OS to connect to another z/OS system on the same CPC

A

Internal coupling

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35
Q

Used to connect to a coupling facility executing in the same CPC

A

Internal coupling

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36
Q

Used to connect to an external coupling facility

A

Coupling

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37
Q

True or False

External devices must be defined to the operation system before they can be used.

A

True

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38
Q

True or False

The HCD must be used by any user before they can write files or datasets to disk devices.

A

False

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39
Q

True or False

External devices must be defined to the channel subsystem before they can be used.

A

True

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40
Q

True or False

Device definitions are performed using the Hardware Configuration Dialog (HCD).

A

True

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41
Q

True or False

The HCD is an ISPF application.

A

True

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42
Q

Name that acronym

OSA

A

Open Systems Adapter

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43
Q

Open Systems Adapter

A

A hardware card for IBM Z mainframes that is used to connect mainframes to standard Ethernet network infrastructure for TCP/IP network connections.

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44
Q

What is the modern Open Systems Adapter

A

OSA Express

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45
Q

True or False

OSA bypasses the channel subsystem?

A

True

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46
Q

True or false

OSA Express supports all internet wiring standards?

A

False - it only accepts Ethernet, including gigabit and 1000Base-T

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47
Q

What can be used to create and manage a configuration source file for the Open Systems Adapter - Integrated Console Controller?

A

Hardware Management Console (HMC)

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48
Q

What is needed to provide operating systems with z/OS consoles?

A

Open Systems Adapter - Integrated Console Controller (OSA-ICC)

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49
Q

Name that acronym

OSA-ICC

A

Open Systems Adapter - Integrated Console Controller

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50
Q

Name that acronym

SMC

A

Shared Memory Communication

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51
Q

Shared Memory Communication

A

A protocol that can improve throughput by accessing data faster, with less latency

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52
Q

How does SMC improve throughput and latency in data access?

A

By allowing two peers to transfer data using system memory buffers that each peer allocates for its partner to use.

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53
Q

Name that acronym

SMC-D

A

SMC-Direct Memory Access

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54
Q

Name that acronym

SMC-R

A

SMC-Remote Direct Access

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55
Q

Which protocol would you use for data access when systems are located in the same central processor complex (CPC)?

A

SMC-Direct Memory Access SMC-D

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56
Q

How is SMC-D able to facilitate data transfer?

A

Through Internal Shared Memory (ISM) technology via virtual adapters through TCP socket endpoints.

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57
Q

How would you share data between central processor complex (CPC)?

A

SMC-Remote Direct Access (SMC-R)

58
Q

True or False

z/OS and other systems in the same CPC require an OSA adapter for TCP/IP Communication.

A

False

59
Q

What mainframe feature uses the OSA protocol for inner CPC communication?

A

Hipersockets

60
Q

True or False

Open System Adapter (OSA) is how the mainframe connects to external networks for TCP/IP connections?

A

True

61
Q

True or False

Open System Adapter (OSA) cannot be used to connect to z/OS and the Hardware Management Console (HMC)

A

False

62
Q

Protocols for internal systems in the same CPC

A

SMC-D and HiperSockets

63
Q

Protocol for communication between LPARs in different systems.

A

SMC-R

64
Q

True or False

The OSA has always been used by mainframes to connect to networks.

A

True

65
Q

True or False

The OSA is a hardware device that connects to the mainframe over a FICON fiber cable.

A

False

66
Q

True or False

OSA today supports Ethernet, FDDI, ATM, and Token Ring network connections.

A

False

67
Q

True or False

The OSA today connects via the normal channel subsystem.

A

False

68
Q

True or False

The OSA can be used to provide operating systems with z/OS consoles.

A

True

69
Q

True or False

The OSA is used for TCP/IP network connections.

A

True

70
Q

True or False

The channel subsystem only uses Special Assist Processors (SAPs), which are separate from normal mainframe processing.

A

True

71
Q

True or False

While the channel subsystem performs I/O for one task, other tasks can perform processing.

A

True

72
Q

True or False

The channel subsystem performs all the I/O processing.

A

False

73
Q

True or False

Once the channel subsystem has completed I/O, it interrupts the normal processors, so that the task requesting I/O can continue.

A

True

74
Q

True or False

The channel subsystem is only used by z/OS.

A

False

75
Q

True or False

The channel subsystem uses memory that is separate from that used by normal mainframe processing.

A

True

76
Q

Which two items are channel communication technologies?

SCSI
zHyperLink
OSA
ATM
FICON

A

zHyperLink
FICON

77
Q

True or False

OSA today can connect to Fast Ethernet and 1000-Base-T networks.

A

True

78
Q

True or False

IBM Mainframes may run more than one instance of a coupling facility?

A

True

79
Q

Name that acronym

PR/SM

A

Processor Resource / System Manager

80
Q

Processor Resource / System Manager

A

Allow multiple operating systems to share the CPC resources

81
Q

True or False

PR/SM preloaded on mainframe?

A

True

82
Q

How does PR/SM allocate memory to LPARs?

A

By dividing it between LPARs, giving each LPAR an area of memory

83
Q

How does PR/SM allocate CPU to LPARs?

A

PR/SM shares CPU so that if one LPAR does not need it, another could use it.

84
Q

True or False

PR/SM can set it up so one LPAR has more CPU than another?

A

True

85
Q

True or False

PR/SM works for all different types of processors on the mainframe?

A

True

General purpose (GP) processors, sometimes referred to as a central processor or (CP)
zIIP - offloading work from GPs
IFL - Linux on IBM Z
ICF - for coupling facilities

86
Q

What feature was added as an optional feature to allow temporary zIIP capacity to be utilized during a shutdown period or IP to speed up recovery times and minimize downtimes?

A

System Recovery Boost

87
Q

Name that acronym

MIF

A

Multiple Image Facility

88
Q

What advantage does Multiple Image Facility (MIF) bring?

A

This reduces the number of physical channels attached to external devices.

89
Q

What technology allows an LPAR to operate as if it has exclusive access to each channel subsystem?

A

PR/SM

90
Q

True or False

Open System Adapters can be shared amongst LPARs?

A

True - and each LPAR believes its access to the OSA is exclusive

91
Q

True or False

z/VM and PR/SM are the same?

A

False - PR/SM and z/VM have similar functionality in that they can configure resource sharing across OS instances

92
Q

True or false

PR/SM can be used to share channels and OSA connections

A

True

93
Q

True or False

PR/SM divides a CPC into logical partitions (LPARs)

A

True

94
Q

True or False

PR/SM is a product that runs under z/OS

A

False

95
Q

True or False

PR/SM can be used to share CPUs amongst LPARs

A

True

96
Q

Is the following statement true for PR/SM, z/VM or both?

Provided with IBM Z mainframes

A

PR/SM

97
Q

Is the following statement true for PR/SM, z/VM or both?

One or more operating systems can run under it

A

Both

98
Q

Is the following statement true for PR/SM, z/VM or both?

Can run under PR/SM

A

z/VM

99
Q

Is the following statement true for PR/SM, z/VM or both?

Runs as an operating system

A

z/VM

100
Q

Is the following statement true for PR/SM, z/VM or both?

Can share CPU

A

Both

101
Q

Is the following statement true for PR/SM, z/VM or both?

Can share channels and OSA connections

A

Both

102
Q

Sysplex

A

A group of z/OS operating systems that communicate using channels and share resources such as datasets

103
Q

Up to how many z/OS images can sysplex support?

A

32 as of z16

104
Q

Name that acronym

XCF

A

Cross-system facility

105
Q

Cross-system facility (XCF)

A

This provides services to allow tasks in a z/OS system to communicate with other tasks, either in the same z/OS system, or a different z/OS system in the same sysplex.

106
Q

What technology allows tasks in z/OS to communicate with other tasks in the same z/OS system or a different one in the same sysplex?

A

Cross-system facility (XCF)

107
Q

What protocol allows z/OS to sync time?

A

Server Time Protocol (STP)

108
Q

Name that acronym

STP

A

Server Time Protocol (STP)

109
Q

What is it referred to as when a sysplex has one or more coupling facilities for common memory for resource sharing?

A

Parallel sysplex

110
Q

Name that acronym

ENQ

A

Enqueue

111
Q

Enqueue

A

A technique used by programs to limit access (through serialization) to a reusable resource.

112
Q

True or False

An ENQ can be seen by all z/OS systems in a sysplex?

A

True

113
Q

What is the advantage of serialized access to a dataset?

A

It ensures only one task can write to a dataset at a time, ensuring data integrity

114
Q

What technology allows multiple writes to a dataset at a time?

A

VSAM record-level sharing

115
Q

How does RSL allow for multiple writes on the same dataset?

A

By serializing at the record level rather than the dataset level

116
Q

True or False

Security software such as RACF can be shared amongst multiple z/OS instances?

A

True - And they see changes

117
Q

True or False

Websphere applications can write to the same log?

A

True - and the logs can be shared with tasks

118
Q

How are tape drives shared? Serialized, or parallel?

A

Serialized. When one is finished, then next OS can use it

119
Q

What technology allows the sharing of resources across z/OS instances?

A

sysplex

120
Q

CICS can also share resources, what’s the arrangement called?

A

CICSPlex

121
Q

Db2 can be shared using what mechanism?

A

Db2 data sharing group

122
Q

Name that acronym

IMS TM

A

IMS Transaction Manager

123
Q

True or False

IBM MQ queues can be shared among z/OS instances?

A

True, allowing multiple tasks to put, or pull from the same queue

124
Q

True or False, z/OS applications can share TCP/IP ports?

A

True, similar to VTAM generic resources

125
Q

True or False

z/OS tasks can share network resources?

A

True, for example VTAM Logical Units

126
Q

Name that acronym

VTAM

A

Virtual Telecommunication Access Method

127
Q

Virtual Telecommunication Access Method

A

a program that facilitates communication between applications and terminals (or other applications) in an SNA network.

128
Q

When a user logs into an application, what are they logging on to?

A

The applications’ VTAM Logical Unit

129
Q

What is a VTAM LU also referred to as?

A

An Application ID, or APPLID for short

130
Q

When two applications share an APPLID, what is this called?

A

a VTAM generic resource

131
Q

Does a user need to know the application they are logging into?

A

No, this is determined by VTAM

132
Q

For resource sharing to occur outside of a sysplex, what must happen

A

Setup of a network communication

133
Q

This can communicate with an external time server.

A

STP

134
Q

This allows z/OS tasks to communicate with tasks in another z/OS system in the same sysplex.

A

Coupling Facility

135
Q

This allows z/OS tasks to communicate with tasks in the same z/OS system.

A

XCF

136
Q

This is required for a Parallel Sysplex.

A

Coupling Facility

137
Q

This is used to synchronize time between mainframes.

A

STP

138
Q

An IBM Z Mainframe CPC can run which four operating system images at the same time?

A

z/VM
KVM
z/OS
Linux on IBM Z

139
Q

PR/SM can be configured so that LPARs share IBM Z mainframe resources. Which three of the following resources can be shared using PR/SM?

Disks
Channels
Open Systems Adapters (OSAs)
Special Assist Processors (SAPs)
Central processors (CPs)

A

Channels
Open Systems Adapters (OSAs)
Central processors (CPs)

PR/SM cannot share Special Assist Processors (SAPs) or disks. Disks can be shared by z/OS systems in the same sysplex, but PR/SM is not required to do this.

140
Q

z/OS uses some sysplex features to allow it to share resources. Which three of the following are such features?

RACF
JES2
Coupling Facility
DFSMSdfp
Server Time Protocol (STP)
XCF

A

Coupling Facility
Server Time Protocol (STP)
XCF

z/OS systems use basic sysplex features, including STP, XCF, and coupling facilities. z/OS builds on these features to share resources.

141
Q

Many z/OS tasks use enqueues (ENQs) for serialization. Which four of the following statements about enqueues are true?

Enqueues cannot be used for tasks running in different z/OS systems in different sysplexes

If another task owns an enqueue, a requesting task cannot obtain it. It must wait, or do something else

Some z/OS components use enqueues for serialization

Enqueues have two names - a major name (QName) and minor name (RName)

Enqueues are attached to actual resources, therefore a dataset enqueue is stored in a physical dataset

Enqueues cannot be used for tasks running in different z/OS systems in the same sysplex

A

Enqueues have two names - a major name (QName) and minor name (RName)

Enqueues cannot be used for tasks running in different z/OS systems in a different sysplex

If another task owns an enqueue, a requesting task cannot obtain it. It must wait, or do something else

Some z/OS components use enqueues for serialization

142
Q

z/OS tasks can share many types of resources, including datasets and JES spool.

Suppose you have two tasks that want to write to a shared log. Which three of the following statements about this situation are true?

To share using normal z/OS features, these tasks must be in the same sysplex

These tasks could write the log to a dataset, and share the dataset

These tasks could share a logstream, a z/OS resource used to store logs

To share using normal z/OS features, these tasks must be in the same z/OS system

These tasks could write the log to an enqueue, and share the enqueue

A

These tasks could write the log to a dataset, and share the dataset

These tasks could share a logstream, a z/OS resource used to store logs

To share using normal z/OS features, these tasks must be in the same sysplex

IBM Mainframe Systems Operator Level I Certificate 2.5 (V2) (10 decks)

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