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Oracle 1z0-133 Exam Dumps & Practice Test Questions


Question No 1:

When monitoring and troubleshooting unicast communication in a cluster, which two metrics are most commonly used? (Choose two.)

A. Groups
B. Master
C. Backup Server
D. Session Replicas
E. Local Group Leader

Answer: A, E

Explanation:

Unicast communication in a cluster environment refers to the direct communication between individual nodes or members of the cluster. To effectively monitor and troubleshoot this communication, certain key metrics help identify how data flows between the nodes, any issues with connectivity, or potential points of failure. Let's break down the options:

A. Groups
This is correct. Groups are a fundamental concept in clustering, where nodes are organized into groups to manage communication and data flow between them. Monitoring the "Groups" metric is crucial for troubleshooting unicast communication, as it helps you identify whether all nodes in a group are able to communicate effectively. If a group is not functioning correctly, communication issues may arise, leading to potential performance bottlenecks or failure in the cluster.

B. Master
This is incorrect. While the "Master" node in a cluster plays an important role, it is not specifically a metric used for monitoring unicast communication. The master node is typically responsible for managing cluster operations and ensuring consistency, but it is not a direct indicator of unicast communication health or performance.

C. Backup Server
This is incorrect. A backup server in a cluster is typically responsible for providing redundancy and failover capabilities. Although backup servers are crucial for cluster availability and reliability, they are not primarily used to monitor or troubleshoot unicast communication. Instead, they focus on backup and recovery tasks.

D. Session Replicas
This is incorrect. Session replicas are used in clusters to maintain data consistency across multiple nodes by replicating session data. However, this metric is more related to maintaining session state and consistency rather than directly monitoring unicast communication.

E. Local Group Leader
This is correct. The Local Group Leader is a node within a group that coordinates communication between other nodes in the same group. Monitoring the Local Group Leader is essential for troubleshooting unicast communication because it serves as the primary point of communication for other nodes in the group. If the Local Group Leader is malfunctioning or unable to communicate with other nodes, unicast communication issues may arise, leading to network disruptions.

In summary, A (Groups) and E (Local Group Leader) are the most relevant metrics for monitoring and troubleshooting unicast communication within a cluster environment. They help identify issues in group communication and coordination between nodes.

Question No 2:

Which two methods help identify what is currently listening at the port and the IP this server is configured to be bound to? (Choose two.)

A. The pmap command lists all processes running with their associated port number.
B. The UNIX lsof command can report information on the process that is listening at a particular IP and port on the local machine.
C. netstat, which is available on Windows and Linux/UNIX, can report on the process bound to this IP and port.
D. pstat will report detailed runtime statistics on any process currently listening at this IP and port.
E. The Linux port watching tool PortInfo can raise an alert anytime a process attempts, succeeds, or fails to connect to a specific IP and port. It can also be used to identify if a port is being used by a java process.

Answer: B, C

Explanation:

When encountering the error message java.net.BindException: Address already in use, it typically means that the server is trying to bind to a port that is already being used by another process. To identify which process is using the port and its associated IP, you can use the following methods:

B. The UNIX lsof command can report information on the process that is listening at a particular IP and port on the local machine: The lsof (List Open Files) command can be used to identify the process using a specific port on a given IP address. By using this command with the -i flag, you can get detailed information about which processes are listening on specific ports, including the PID (process ID) and associated IP address. For example:

  •  This command helps identify the process using the port, which is essential for troubleshooting port binding issues.

C. netstat, which is available on Windows and Linux/UNIX, can report on the process bound to this IP and port: The netstat (Network Statistics) command can show which process is bound to a particular IP and port on both Linux and Windows systems. The -tuln options in Linux or the -aon options in Windows will show which process is using the port. For example:

  •  This command will display the port and the process ID (PID) associated with it, allowing you to track down the process that is currently listening.

The other options are not as useful or relevant for identifying the process and port:

  • A. The pmap command lists all processes running with their associated port number: The pmap command is primarily used for showing memory usage of a process and does not provide port number details. It’s not designed to report on network connections or ports, so it is not ideal for troubleshooting port binding issues.

  • D. pstat will report detailed runtime statistics on any process currently listening at this IP and port: pstat is a system command in Solaris that provides process statistics, but it doesn't give detailed information about network ports or the processes bound to those ports. It’s not suitable for the task of identifying processes bound to specific ports.

  • E. The Linux port watching tool PortInfo can raise an alert anytime a process attempts, succeeds, or fails to connect to a specific IP and port: While PortInfo is a tool for monitoring network connections, it is not a standard utility in most Linux distributions. Additionally, it is not as commonly used or as simple as lsof or netstat for identifying processes bound to ports.

In conclusion, the most reliable methods for identifying what is currently listening at a port and the associated IP are using the lsof and netstat commands.

Question No 3:

Which Administration Console action implements the requirement for all servers in a dynamic cluster to bind the specific domain name mycompany.com?

A. Use a ${macro} in the server template's listen address.
B. Assign each dynamic server a separate machine.
C. Create multiple server templates for the cluster.
D. Update the cluster's listen address prefix.

Answer: A

Explanation:

In a dynamic cluster, all servers need to be able to bind to a specific domain name, in this case, "mycompany.com." The WebLogic Server Administration Console provides several ways to configure server settings, including the listen address for servers in a cluster. Let's go over the options:

  • A. Use a ${macro} in the server template's listen address: This is the correct option. In WebLogic Server, you can use macros to dynamically resolve certain values when configuring the listen address of servers. By using the ${macro} in the server template's listen address, you can ensure that all servers in the dynamic cluster bind to the specific domain name (e.g., mycompany.com). The ${macro} allows for a flexible and consistent approach to binding domain names across multiple servers, even in a dynamic cluster setup.

  • B. Assign each dynamic server a separate machine: This option is not required for binding the domain name to the servers. While assigning separate machines for each dynamic server might be necessary for other use cases (e.g., fault isolation or scaling), it doesn't directly address the need to bind a specific domain name to all the servers in the cluster. The domain name binding can be done within a single machine or multiple machines, depending on the configuration of the listen address.

  • C. Create multiple server templates for the cluster: This option is not required. Multiple server templates are typically used to define different configurations for different servers or types of servers within a cluster, but they are not specifically needed to bind the same domain name to all servers. You can achieve the desired domain name binding by configuring the listen address within a single template, especially if the servers in the cluster are all intended to use the same domain.

  • D. Update the cluster's listen address prefix: This option involves changing the cluster's listen address, but it doesn't address the binding of a specific domain name like "mycompany.com." The listen address prefix could be helpful if you want to specify the general address pattern for the cluster, but it doesn't directly implement the requirement for binding the exact domain name across all servers.

Therefore, the correct action to implement the requirement of binding the specific domain name "mycompany.com" to all servers in the dynamic cluster is A: Use a ${macro} in the server template's listen address.

Question No 4:

What does the script called startWebLogic.sh (.cmd in Windows) in the root folder of your domain do?

A. Starts a machine
B. Starts Node Manager
C. Starts a Managed server
D. Calls the startWebLogic.sh script in the domain's bin directory
E. Calls the startManagedWebLogic.sh script in the domain's bin directory

Answer: E

Explanation:

In Oracle WebLogic Server, various startup scripts are used to initialize and manage different components like the WebLogic Server instance, Node Manager, and Managed Servers. The script startWebLogic.sh (.cmd for Windows) is typically found in the root directory of a WebLogic domain, and it serves a specific purpose related to starting the WebLogic environment.

Let's analyze each option to understand the correct behavior:

A. Starts a machine:
This is incorrect. The script startWebLogic.sh is not used to start a machine, but rather to start WebLogic-related services like servers or Node Managers. The term "machine" in WebLogic refers to a physical or virtual machine where WebLogic runs, but the script does not start a machine itself.

B. Starts Node Manager:
This option is incorrect because the startWebLogic.sh script does not start the Node Manager. Instead, the Node Manager is usually started separately using its own script (e.g., startNodeManager.sh), and it manages server processes, but startWebLogic.sh is not responsible for starting it.

C. Starts a Managed server:
This is not the correct answer because the startWebLogic.sh script itself does not directly start a Managed Server. The script may indirectly be used to call a different script that starts the Managed Server, but it’s primarily designed to start the WebLogic Server instance itself.

D. Calls the startWebLogic.sh script in the domain’s bin directory:
This option is somewhat misleading. While startWebLogic.sh could call other scripts, it’s important to note that the script located in the root folder of the domain does not specifically call another startWebLogic.sh script from the bin directory. The correct function of the script is more related to calling the startManagedWebLogic.sh script for the Managed Server.

E. Calls the startManagedWebLogic.sh script in the domain’s bin directory:
This is the correct answer. The startWebLogic.sh script located in the root directory of the domain often serves as a wrapper or a shortcut that calls the startManagedWebLogic.sh script, which is located in the bin directory of the domain. The startManagedWebLogic.sh script is responsible for starting a Managed Server instance in WebLogic. So, the root directory script helps initiate the Managed Server startup process.

Thus, the correct answer is E, as the startWebLogic.sh script in the domain's root directory calls the startManagedWebLogic.sh script from the bin directory to start a Managed Server.

Question No 5:

Which two elements must have a unique combination for each network channel defined on a WebLogic Server instance? (Choose two.)

A. Tunneling enabled
B. Listen address
C. Listen port
D. Outbound enabled
E. Channel weight

Answer: B, C

Explanation:

In Oracle WebLogic Server, a network channel defines the communication parameters for how a server instance listens for incoming requests or sends outbound requests. Each WebLogic Server instance can have multiple network channels, but each channel must have a unique combination of certain parameters to ensure proper communication and avoid conflicts.

Option B (Listen address) refers to the IP address or hostname on which the WebLogic Server listens for incoming traffic for a particular network channel. If you define multiple channels for a WebLogic Server instance, the listen address must be unique for each channel unless they are bound to the same IP address, which still requires uniqueness in other parameters, such as listen port.

Option C (Listen port) refers to the specific port number on which the WebLogic Server listens for requests. For each network channel, the listen port must be unique. If multiple channels are configured to listen on the same address, they must use different port numbers. This is crucial to prevent conflicts, as each channel needs to bind to a distinct combination of address and port.

Option A (Tunneling enabled) is not a required unique element for each network channel. Tunneling refers to whether the network channel supports HTTP tunneling, which is a specific feature but does not need to be unique for each channel.

Option D (Outbound enabled) also does not need to be unique across multiple network channels. Outbound enabled simply indicates whether the channel is used for outbound communication, but it is not required to be unique in the context of channel configurations.

Option E (Channel weight) is used in load balancing and does not need to be unique for each network channel. It defines the relative weight or importance of the channel when WebLogic Server performs load balancing, but this is a configuration parameter rather than one that enforces uniqueness for each channel.

Therefore, the two elements that must have a unique combination for each network channel on a WebLogic Server instance are B (Listen address) and C (Listen port). These parameters ensure that each channel can independently handle traffic without conflict.

Question No 6:

Identify two reasons for defining machines and assigning servers to them in WebLogic Server. (Choose two.)

A. A machine can be the proxy to a cluster.
B. A machine definition is required to configure the Node Manager.
C. To reference an instance of WebLogic Server, you must know its machine and port.
D. A machine is a required organizational unit. A domain contains machines and machines contain servers.
E. WebLogic Server uses server machine assignments to help it choose servers in a cluster on which to replicate session state.
F. A machine's Cluster Weight attribute may be used by load balancers to help them determine how often to send requests to servers assigned to that machine.

Answer: B, F

Explanation:

When configuring WebLogic Server, defining machines and assigning servers to them is an important part of managing and organizing the environment. Let's explore the two correct reasons for this:

  • B: A machine definition is required to configure the Node Manager in WebLogic Server. The Node Manager is a utility used for managing WebLogic Server instances remotely, and it requires machine definitions to connect to the server instances. The Node Manager communicates with servers through the machine definition, which includes information about the physical or virtual machine hosting the WebLogic Server. Without defining the machine, the Node Manager cannot be properly configured or function as intended.

  • F: The Cluster Weight attribute on a machine may be used by load balancers to help determine the distribution of requests to servers assigned to that machine. This is a key feature for load balancing in clustered environments. By setting a Cluster Weight on a machine, WebLogic allows the load balancer to make informed decisions about how to distribute traffic between servers based on the weight assigned to each machine. This ensures that traffic is balanced in an optimized way across servers and machines in a cluster.

Now, let's briefly review why the other options are incorrect:

  • A: While a machine may be part of a cluster, it is not typically considered a "proxy" to the cluster. A machine serves as the physical or virtual host for WebLogic Server instances, but it doesn’t function as a proxy to the cluster. So, A is not a primary reason for defining machines.

  • C: While it’s true that machines and ports are important to reference WebLogic Server instances, the statement doesn't focus on the core reason for defining machines. Machines are more crucial for Node Manager configuration and load balancing than for merely referencing instances. Hence, C is not one of the best reasons.

  • D: Machines are not a required organizational unit in WebLogic Server in the way this statement implies. While a domain can contain machines and servers, machines themselves are defined primarily for purposes like Node Manager configuration and load balancing, not simply as organizational units. Thus, D is incorrect.

  • E: WebLogic Server does not directly use machine assignments for choosing servers to replicate session state. Session state replication is typically managed within the cluster configuration and is independent of machine assignments. Therefore, E is incorrect.

In conclusion, the correct answers are B and F, as they focus on the essential reasons for defining machines and assigning servers to them in WebLogic Server, particularly in relation to Node Manager configuration and load balancing.

Question No 7:

You want to configure WebLogic Server transactions to be recoverable when a nonclustered managed server crashes, even if that crash is caused by an unrecoverable hardware failure. You want to run the managed server on different hardware, and have it recover the transactions that were in-progress at the time of the crash. 

You also want to use the default store for transaction logs. Which statement is true?

A. This scenario is not possible. You must use the JDBC store to recover transactions from a crashed server.
B. This scenario is not possible. You must use clustered managed servers to recover transactions from a crashed server.
C. This scenario is common, and so the default configuration of the default store works.
D. Before the crash, you need to update the path to the default store for the managed server. The path should be to some shared storage location.
E. After the crash, obtain a copy of the managed server's default store from the administration server. Move it to the same relative location on the new hardware before starting the managed server there.

Answer: D

Explanation:

WebLogic Server provides transaction recovery capabilities to ensure that transactions in-progress at the time of a crash can be recovered. However, the default transaction log store configuration (which is typically file-based) is not sufficient for ensuring transaction recovery if the server crashes and is restarted on different hardware. There are a few important aspects to consider here:

  1. Default Transaction Log Store:
    WebLogic’s default store for transaction logs typically stores transaction information in a local directory. If the managed server crashes, and you want to recover transactions on a different machine, the transaction log data must be stored in a location that is accessible from both the original and new hardware. This ensures that after the crash, when the managed server is restarted on new hardware, the transaction logs can be accessed to replay the in-progress transactions.

  2. Shared Storage Requirement:
    To make transactions recoverable on different hardware, the transaction log store must be stored in a shared location accessible to both the original and new hardware. This is typically done by specifying a shared storage location, which can be on a network file system (NFS), a storage area network (SAN), or some other shared filesystem. By doing this, the transaction log can be easily moved or accessed by the server running on the new hardware.

  3. Transaction Recovery on Different Hardware:
    In the case of a crash, if the server is moved to different hardware, the location of the transaction logs must be updated to point to the shared storage, ensuring that transaction recovery can take place. WebLogic uses the logs stored in this shared location to recover the state of transactions.

  4. Other Options:

    • A is incorrect because WebLogic supports using the default store for transaction logs, not necessarily a JDBC store. The JDBC store is often used for more complex scenarios involving databases.

    • B is incorrect because clustered managed servers are not required to recover transactions. Even non-clustered servers can use shared storage for transaction recovery.

    • C is incorrect because the default configuration does not work in this case; you need to configure shared storage to recover transactions on a new machine.

    • E is incorrect because copying the default store from the administration server is not a sufficient solution. It would not guarantee the recovery of transactions unless the store is in a shared location.

Thus, the correct answer is D. Before a crash, you need to update the path to the default store for the managed server to point to a shared storage location that can be accessed from both the original and the new hardware. This configuration ensures transaction recovery when the server restarts on different hardware.

Question No 8:

To support a growing application workload, you need to scale out an existing (nondynamic) cluster. You power up the new hardware and install WebLogic server. 

Which two changes are mandatory for you to make to your domain configuration? (Choose two.)

A. Create a new deployment plan.
B. Create a new machine.
C. Create a new server.
D. Add a server to the cluster.
E. Add a server to the machine.
F. Add the cluster to the machine.

Answer: B, D

Explanation:

Scaling out an existing WebLogic Server cluster involves adding additional servers to the cluster in order to meet growing application demands. When you power up new hardware and install WebLogic Server, several configuration changes are required in order to integrate the new servers into your existing domain and cluster setup. Let’s examine the changes that are mandatory:

Benefit of Option B:
Create a new machine: Before you can add the new hardware (which has WebLogic installed) to your domain, you need to create a new machine in the WebLogic domain configuration. A machine represents the physical or virtual server where WebLogic Server instances are running. This step is necessary because the new hardware needs to be registered as a machine in the WebLogic domain before you can assign it to a server.

Benefit of Option D:
Add a server to the cluster: After creating the new machine, the next mandatory step is to add a new server to the cluster. A cluster in WebLogic consists of multiple WebLogic Server instances that work together to provide scalability and reliability for applications. Adding a server to the cluster ensures that the new server instance becomes part of the workload distribution and the load balancing mechanism within the cluster. This is essential for scaling out your application to meet increasing demand.

Why the Other Options Are Incorrect:

  • Option A: Create a new deployment plan is not mandatory when scaling out the cluster. A deployment plan is used for managing the deployment of applications across multiple environments, but it is not required for adding servers to an existing cluster.

  • Option C: Create a new server is required to create the WebLogic Server instance, but it’s not sufficient by itself. You also need to ensure that this server is added to a cluster (which is covered by Option D).

  • Option E: Add a server to the machine is not a mandatory step. In WebLogic, once a machine is created, you don’t specifically "add a server" to the machine. Instead, you assign the server to the machine. The key step is to add the server to the cluster, which automatically associates it with the machine it’s running on.

  • Option F: Add the cluster to the machine is also unnecessary. The machine doesn’t directly interact with the cluster configuration. The machine just provides the physical resources where the server runs, and the cluster configuration pertains to server instances.

Therefore, the correct answers are B and D. These steps are mandatory for scaling out the WebLogic cluster to support growing application workloads.

Question No 9:

Which two of the following statements are correct regarding the process of upgrading WebLogic Server to version 12c (12.1.12)? (Choose two.)

A. To use the Reconfiguration Wizard, your current WebLogic Server version must be 9.0 or higher.
B. The Domain Upgrade Wizard is no longer available in 12.1.2.
C. After running the wizard to update your domain, you must reapply your start script customizations.
D. You need to update the domain's administration server files.

Answer: A, C

Explanation:

Upgrading to WebLogic Server version 12c (12.1.12) requires several steps, including the use of wizards and ensuring that custom configurations are properly managed. Let’s go over the correct answers and why they are the right choice in this context.

A. To use the Reconfiguration Wizard, your current WebLogic Server version must be 9.0 or higher.
This statement is correct. The Reconfiguration Wizard is a tool provided by Oracle to assist in upgrading WebLogic Server. It helps automate certain processes involved in migrating to a new version. However, for this wizard to work, your current WebLogic Server version must be at least 9.0 or higher. If you're using a version lower than 9.0, the wizard cannot be used, and you'll need to follow other upgrade processes.

C. After running the wizard to update your domain, you must reapply your start script customizations.
This statement is also correct. When upgrading WebLogic Server, running the upgrade wizards (such as the Domain Upgrade Wizard) may overwrite or change certain configuration settings, including start script customizations. These customizations often relate to the way WebLogic is started, such as memory settings, environment variables, or other configurations. After the upgrade, it is important to reapply these customizations to ensure that your WebLogic Server functions as expected with your specific requirements.

Let’s now review why the other statements are incorrect:

B. The Domain Upgrade Wizard is no longer available in 12.1.2.
This statement is incorrect. The Domain Upgrade Wizard is still available in WebLogic Server version 12.1.2 and plays a critical role in upgrading WebLogic domains from older versions. This wizard helps in updating domain configurations to be compatible with the new version of WebLogic Server.

D. You need to update the domain's administration server files.
This statement is misleading. While it's true that some updates during the upgrade process may involve the administration server, the Domain Upgrade Wizard typically handles the necessary updates to the domain's configurations. The administration server itself is generally part of the domain's overall configuration and doesn't require separate attention unless specific customizations or issues arise.

In conclusion, the correct answers are A and C, as they accurately describe key aspects of upgrading WebLogic Server, particularly the requirements for using the Reconfiguration Wizard and the necessity of reapplying customizations after the upgrade process.

Question No 10:

What is the mode of operation of the Node Manager after updating a WebLogic Server domain from WLS 10.3.6 to WLS 12.1.12, and what is needed to maintain the same behavior as in WLS 10.3.6?

A. Nothing, Node Manager runs and behaves the same on both WLS versions.
B. Node Manager runs in "per machine" mode and nothing is needed to keep the same behavior.
C. Node Manager runs in "per domain" mode and requires manual steps to return to "per machine" mode, used in WLS 10.3.6.
D. Node Manager mode of operating and behavior can be selected in Reconfiguration Wizard.

Answer: C

Explanation:

When upgrading a WebLogic Server (WLS) domain from version 10.3.6 to 12.1.12, changes in the default behavior of the Node Manager can occur. In WLS 10.3.6, the Node Manager typically runs in "per machine" mode, which means that Node Manager is configured for a machine and all domains on that machine share the same Node Manager configuration.

However, in WLS 12.1.12, the default mode for Node Manager is "per domain" mode. In this mode, each domain has its own Node Manager configuration, which provides more granular control but differs from the "per machine" approach used in earlier versions like WLS 10.3.6.

If you want to keep the same behavior as WLS 10.3.6 after the upgrade (i.e., maintain the "per machine" mode), you need to manually change the Node Manager configuration in WLS 12.1.12. This requires modifying the configuration file or using the appropriate administration commands to revert to the "per machine" mode.

Let’s go through the other options:

  • A. Nothing, Node Manager runs and behaves the same on both WLS versions: This is incorrect because the default Node Manager mode changes between WLS 10.3.6 and WLS 12.1.12, so it won't behave the same without modifications.

  • B. Node Manager runs in "per machine" mode and nothing is needed to keep the same behavior: This is incorrect because, after upgrading to WLS 12.1.12, Node Manager operates in "per domain" mode by default, not "per machine" mode. Therefore, some changes are needed to restore the previous behavior.

  • D. Node Manager mode of operating and behavior can be selected in the Reconfiguration Wizard: This is incorrect because the Reconfiguration Wizard does not provide an option to change the Node Manager mode between "per machine" and "per domain". This change is typically done manually via configuration files or specific administrative steps.

Thus, the correct answer is C, which states that after the upgrade to WLS 12.1.12, Node Manager runs in "per domain" mode, and you must manually adjust the configuration to return to "per machine" mode as used in WLS 10.3.6.