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Exam Code: C90-03A

Exam Name: SOA Certified Professional (Cloud Technology Lab)

Exam Code: C90-02A

Exam Name: SOA Certified Professional (Cloud Technology Concepts)

Exam Code: C90-01A

Exam Name: SOA Certified Professional (Fundamental Cloud Computing(C90.01))

Exam Code: S90-20A

Exam Name: SOA Certified Professional (SOA Security Lab)

Exam Code: S90-19A

Exam Name: SOA Certified Professional (Advanced SOA Security)

Exam Code: S90-18A

Exam Name: SOA Certified Professional (Fundamental SOA Security)

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NO.1 The owner of a service inventory reports that the public key related to a certain private key has been
lost. There is a concern that this was the result of a security breach. A security specialist recommends
contacting the certificate authority in order to add the corresponding certificate to the certificate authority's
Certificate Revocation List (CRL). However, the certificate authority responds by indicating that this is not
necessary. Which of the following answers explains this response?
A. The certificate authority needs to issue a new public key instead.
B. The certificate authority requires that the existing public key needs to be changed within the existing
certificate.
C. Public keys cannot get lost because they are alreadypublicallyavailable.
D. None of the above
Answer: C

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NO.2 As a requirement for accessing Service B, Service A needs to encrypt its request message. Service B
decrypts the message, makes some changes, encrypts the message, and then forwards it to Service C.
However, the message does not make it to Service C. Instead, a runtime error is raised by a service agent
that does not support encryption. This service agent only requires access to the message header in order
to route the message to the appropriate instance of Service C. It is therefore decided that the header part
of the message will not be encrypted. Which of the following can be used to address this requirement?
A. certificate authority
B. SAML
C. non-repudiation
D. None of the above
Answer: D

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NO.3 A task service needs to access three entity services as part of a service composition. The task service
needs to authenticate itself every time it accesses one of the three entity services. Because the task
service must authenticate itself three times to complete its task, the current service composition design is
considered inefficient. How can it be improved while continuing to fulfill the authentication requirements?
A. Increase the network bandwidth between the task service and the entity services.
B. Use a single sign-on mechanism.
C. Remove the authentication requirements within the service composition, thereby reducing the
message size and making communication faster.
D. None of the above
Answer: B

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NO.4 Service A relies on a shared identity store. Service B has its own identity store. Service C also has its
own identity store, but must also access the shared identity store used by Service A. Which service has
the least reduction in autonomy as a result of its relationship with identity store mechanism(s)?
A. Service A
B. Service B
C. Service C
D. The autonomy of all services is affected equally
Answer: B

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NO.5 Service A and Service B belong to Organization A and Service C belongs to Organization B. Service A
sends confidential messages to Service B, which forwards these messages to Service
C. The message sent to Service C is intercepted by a load balancing service agent that determines which
instance of Service C to route the message to. This entire message path needs to be encrypted in order
to ensure message confidentiality from when the message is first sent by Service A until it is received by
an instance of Service C. Organization A doesn't trust any intermediaries that may exist in between
Service B and Service C and also doesn't want to share any keys with Organization B. Furthermore, there
is a requirement to minimize any adverse effects on performance. Which of the following approaches
fulfills these requirements?
A. Use message-layer security by adding symmetric encryption between Services A, B and C. This
way,message content is not available to any intermediaries between Services B and C.
B. Because Service A and Service B exist within the same organizational boundary, use transport-layer
security to provide message confidentiality. Use message-layer security via asymmetric encryption
between Service B and Service C.
C. Use transport-layer security between Service B and Service C and use message-layer security via
asymmetric encryptionbetween Service A and Service B. This way. all the services are secured while at
the same time minimizing the performance degradation between Service B and Service C.
D. None of the above.
Answer: B

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NO.6 The requirement to defer security related state data at runtime relates directly to the application of which
service-orientation principle?
A. Service Loose Coupling
B. Service Autonomy
C. Service Abstraction
D. None of the above.
Answer: D

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NO.7 Digital signatures use encryption and hashing.
A. True
B. False
Answer: A

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NO.8 The use of XML-Encryption supports the application of the Service Abstraction principle because the
actual message remains hidden from the attacker.
A. True
B. False
Answer: B

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NO.9 The manager of an IT department decides to split up an existing enterprise service inventory into two
domain service inventories. The public key used previously in the enterprise service inventory can
continue to be used in one of the domain service inventories.
A. True
B. False
Answer: A

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NO.10 The SAML and WS-Security industry standards can be applied to the same service composition
architecture.
A. True
B. False
Answer: A

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NO.11 The application of the Brokered Authentication pattern is best suited for a scenario whereby a service
consumer does not need to re-authenticate itself with multiple services.
A. True
B. False
Answer: B

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NO.12 The application of the Data Origin Authentication pattern only provides message integrity.?
A. True
B. False
Answer: B

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NO.13 Which of the following is not a hashing algorithm?
A. MD5
B. X.509
C. SHA-1
D. SHA-256
Answer: B

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NO.14 Service A sends a message to Service B which reads the values in the message header to determine
whether to forward the message to Service C or Service D. Because of recent attacks on Services C and
D, it has been decided to protect the body content of messages using some form of encryption. However,
certain restrictions within the design of Service B will not permit it to be changed to support the encryption
and decryption of messages. Only Services A, C and D can support message encryption and decryption.
Which of the following approaches fulfill these security requirements without changing the role of Service
B?
A. Transport-layer security is implemented between all services.
B. Message-layer security is implemented between all services.
C. Service B is removed. Instead, the routing logic is added to Service A.
D. None of the above
Answer: B

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NO.15 A service contract includes a security policy that exposes specific details of the service's underlying
implementation. This is an example of the application of which service-orientation principle?
A. Service Abstraction
B. Service Loose Coupling
C. Standardized Service Contract
D. None of the above.
Answer: D

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Exam Code: S90-20A

Exam Name: SOA Certified Professional (SOA Security Lab)

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NO.1 Service A exchanges messages with Service B multiple times during the same runtime service activity.
Communication between Services A and B has been secured using transport-layer security. With each
service request message sent to Service B (1A. IB), Service A includes an
X.509 certificate, signed by an external Certificate Authority (CA). Service B validates the certificate by
retrieving the public key of the CA (2A. 2B) and verifying the digital signature of the
X.509 certificate. Service B then performs a certificate revocation check against a separate external CA
repository (3A, 3B). No intermediary service agents reside between Service A and Service B.
To fulfill a new security requirement, Service A needs to be able to verify that the response message sent
by Service B has not been modified during transit. Secondly, the runtime performance between Services
A and B has been unacceptably poor and therefore must be improved without losing the ability to verify
Service A's security credentials. It has been determined that the latency is being caused by redundant
security processing carried out by Service B.
Which of the following statements describes a solution that fulfills these requirements?
A. Apply the Trusted Subsystem pattern to introduce a utility service that performs the security processing
instead of Service B. The utility service can verify the security credentials of request messages from
Service A and digitally sign messages sent to Service A to enable verification of message integrity.
Furthermore, the utility service can perform the verification of security credentials submitted by Service A
only once per runtime service activity. After the first messageexchange, it can issue a SAML token to
Service A that gets stored within the current session. Service A can then use this session-based token
with subsequent message exchange. Because SAML tokens have a very small validity period (in contrast
to X.509 certificates), there is no need to perform a revocation check with every message exchange.
B. Service B needs to be redesigned so that it performs the verification of request messages from Service
A only for the first message exchange during the runtime service activity. Thereafter, it can issue a SAML
token to Service A that gets stored within the current session. Service A then uses this session-based
token with subsequent message exchanges. Because SAML tokens have a very small validity period (in
contrast to X.509 certificates), there is no need to perform a revocation check with every message
exchange.
C. WS-SecurityPolicy transport binding assertions can be used to improve performance via
transport-layer security The use of symmetric keys can keep the encryption and decryption overhead to a
minimum, which will further reduce the latency between Service A and Service B. By encrypting the
messages, attackers cannot modify message contents, so no additional actions for integrity verification
are needed.
D. The Data Origin Authentication pattern can be applied together with the Service Perimeter Guard
pattern to establish a perimeter service that can verify incoming request messages sent to Service B and
to filter response messages sent to Service A. The repository containing the verification information about
the Certificate Authorities can be replicated in the trust domain of the perimeter service. When access is
requested by Service A, the perimeter service evaluates submitted security credentials by checking them
against the locally replicated repository. Furthermore, it can encrypt messages sent to Service A by
Service B. and attach a signed hash value.
Answer: A

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NO.2 Service Consumer A sends a request message to Service A (1) after which Service A retrieves financial
data from Database A (2). Service A then sends a request message with the retrieved data to Service B
(3). Service B exchanges messages with Service C (4) and Service D (5), which perform a series of
calculations on the data and return the results to Service A. Service A uses these results to update
Database A (7) and finally sends a response message to Service Consumer A (8). Component B has
direct, independent access to Database A and is fully trusted by Database A. Both Component B and
Database A reside within Organization A. Service Consumer A and Services A, B, C, and D are external to
the organizational boundary of Organization A.
Component B is considered a mission critical program that requires guaranteed access to and fast
response from Database A. Service A was recently the victim of a denial of service attack, which resulted
in Database A becoming unavailable for extended periods of time (which further compromised
Component B). Additionally, Services B, C, and D have repeatedly been victims of malicious intermediary
attacks, which have further destabilized the performance of Service A.
How can this architecture be improved to prevent these attacks?
A. A utility service is created to encapsulate Database A and to assume responsibility for authenticating all
access to the database by Service A and any other service consumers. Due to the mission critical
requirements of Component B, the utility service further contains logic that strictly limits the amount of
concurrent requests made to Database A from outside the organizational boundary. The Data
Confidentiality and Data Origin Authentication patterns are applied to all message exchanged within the
external service composition in order to establish message-layer security.
B. Service Consumer A generates a private/public key pair and sends this public key and identity
information to Service A. Service A generates its own private/public key pair and sends it back to Service
Consumer A. Service Consumer A uses the public key of Service A to encrypt a randomly generated
session key and then sign the encrypted session key with the private key. The encrypted, signed session
key is sent to Service A. Now, this session key can be used for secure message-layer communication
between Service Consumer A and Service A. The Service Perimeter Guard pattern is applied to establish
a perimeter service that encapsulates Database A in order to authenticate all external access requests.
C. Services B, C, and D randomly generate Session Key K, and use this key to encrypt request and
response messages with symmetric encryption. Session Key K is further encrypted itself asymmetrically.
When each service acts as a service consumer by invoking another service, it decrypts the encrypted
Session Key K and the invoked service uses the key to decrypt the encrypted response. Database A is
replicated so that only the replicated version of the database can be accessed by Service A and other
external service consumers.
D. The Direct Authentication pattern is applied so that when Service Consumer A submits security
credentials, Service A will be able to evaluate the credentials in order to authenticate the request
message. If the request message is permitted, Service A invokes the other services and accesses
Database A. Database A is replicated so that only the replicated version of the database can be accessed
by Service A and other external service consumers.
Answer: A

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