TAW_10_1 chapter 5, system core

Question 1

In an SAP ABAP + JAVA installation, ho do the runtime environments comunicate?

Answer 1

Thru a JCO connector

SAP Java connector

Question 2

When did the Central Instance become split between the PAS and the ASCS

Answer 2

NetWeaver 7.1+

Question 3

What services are contained on the ABAP Central Services Instance

Answer 3

Message Server
Enqueue Server
Other optional services include

Question 4

How many ABAP Central Services Instances can a single system contain?

Answer 4

Only one, and the services on the ASCS can only be on that single instance

Question 5

What services exist on the PAS and AAS instances

Answer 5

Gateway, ICM, Dispatcher, Work processes

Question 6

Name the types of work proceses

Answer 6

D - dialog
S - Spool
V - Update and Update2 (as UPD and UP2)
B - Background
E - Enqueue (may only exist for a single dispatcher)

Question 7

What Tcode shows an over view of application servers

Answer 7

SM51

Question 8

Does the message server do anything important?

Answer 8

Yes, it registers available instances and allows communication between them. It handles logon load balancing. Allows the dispatchers to communicate with other instances. Handles lock requests thru the enqueue server

Question 9

What tcode can show me who is logged on to the system?

Answer 9

SM04

Question 10

How can I find out what server I am logged onto?

Answer 10

System settings

Question 11

What tcode can tell me aobout the status of work process on application servers?

Answer 11

SM50

Question 12

How many Spool processes are required in each system

Answer 12

At least one but more than one can be configured

Question 13

How many update processes are required in each system

Answer 13

At least one but more than one can be configured

Question 14

How many background processes are required in each system

Answer 14

At least one but, if you will be doing transports in the system you need at least 2. More than this can be configured

Question 15

How many enqueue processes are required in each system

Answer 15

At least one but more than one can be configured provided they are all on the same instance
So think of it like this, all enqueue processes must be attached to the same dispatcher, but that dispatcher can have more than one enqueue process

Question 16

What 4 min things does the dispatcher do?

Answer 16

Distributes the requests among the work processes
Integrates the presentation layer
Organizes communication activities
Processes the requests on a first in/first out basis

Question 17

What kind of things might I find in the buffer area of an application server?

Answer 17

Programs, Factory calendar, T001W….

Question 18

What are the 5 parts of every work process?

Answer 18

Screen Processor
ABAP Interpreter
Database Interface
Internal Memory
Task Handler

Question 19

The Screen Processor is part of a…?

Answer 19

Work process

Question 20

The ABAP Interpreter is part of a…?

Answer 20

Work process

Question 21

The Database Interface is part of a…?

Answer 21

Work process

Question 22

The Internal Memory is part of a…?

Answer 22

Work process

Question 23

The Task Handler is part of a …?

Answer 23

Work process

Question 24

How can native SQL be invoked?

Answer 24

EXEC SQL
…
END EXEC

Question 25

What is bypassed when using native SQL

Answer 25

The database interface, buffered data

Question 26

What are the principles of A.C.I.D.?

Answer 26

Atomic - It either works entirely or not at all
Consistent - the status changes from one to another and both re correct
Isolated - The changes being made in a transaction can only be seen in other transactions after final commit
Durable - The final changes are permanently stored in the database at final commit

Question 27

All business transaction changes must be included as one…..?

Answer 27

Database LUW

Question 28

What are the four lock modes?

Answer 28

Exclusive
Shared
Exclusive non-cumlative
Optimistic

Question 29

Can I change an object that has a shared lock?

Answer 29

No, you can only read it

Question 30

What 2 ways can a user lock be forcefully removed

Answer 30

SM04 (kill the session)

SM12 (kill the lock but be careful to make sure the user has left the transaction)

Question 31

What do all update tables start with

Answer 31

VB

Question 32

What are the 3 types of updates?

Answer 32

V1 - time critical, all or nothing
V2 - Not time critical, all V1 updates must be sucessful
Non time critical, collective run

Question 33

What program must run to handle collective runs

Answer 33

RSM13005

Question 34

In what tcode can updates be monitored?

Answer 34

SM13

Question 35

What work processes can CREATE spool request?

Answer 35

Dialog or background only, theses store to TEMSE and then the Spool work process reads the TEMSE to process the request

Question 36

Where are spool requests stored

Answer 36

TEMSE

Question 37

What is the normal maximum amount of time a dialog process can run?

Answer 37

10 minutes

Question 38

How can background jobs be defined

Answer 38

SM36

Question 39

How can background jobs be monitored

Answer 39

SM37

Question 40

How do third party programs communicate with the dispatcher?

Answer 40

Thru the gateway reader

Question 41

How does a process on one instance communicate with a process on another instance

Answer 41

Thru the gateway reader

Question 42

What three protocols are supported by the ICM

Answer 42

HTTP, HTTPS, SMTP

Question 43

How can the ICM be monitored

Answer 43

Tcode SMICM