Oracle 1Z0-821 Online Practice Questions and Exam Preparation

Oracle 1Z0-821 Online Questions & Answers

• Question 21:

  The /etc/hosts file can be best described as______.

  A. a local database of host names for rlogin, rsh, and rep
  B. the configuration file for the host name of the system
  C. a local database of information for the uname command
  D. the configuration file for the Domain Name Service (DNS)
  E. a local database of host names and their associated IP addresses
  E. a local database of host names and their associated IP addresses

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  As your machine gets started, it will need to know the mapping of some hostnames to IP addresses before DNS can be referenced. This mapping is kept in the /etc/hosts file. In the absence of a name server, any network program on your system consults this file to determine the IP address that corresponds to a host name.

• Question 22:

  dbzone is currently running on your server.

  Which two methods would you use to safely and cleanly shut down dbzone and all of its applications?

  A. zlogin -z dbzone halt
  B. zoneadm -z dbzone shutdown -i0
  C. zoneadm -z dbzone shutdown
  D. zoneadm -z dbzone halt
  E. zlogin dbzone shutdown -i0
  D. zoneadm -z dbzone halt
  E. zlogin dbzone shutdown -i0

  ---

  D: zoneadm halt command halts the specified zones. halt bypasses running the shutdown scripts inside the zone. It also removes run time resources of the zone.

  E: Use: zlogin zone shutdown

  to cleanly shutdown the zone by running the shutdown scripts.

  Use this procedure to cleanly shut down a zone.

  1.

  Become superuser, or assume the Primary Administrator role.

  2.

  Log in to the zone to be shut down, for example, my-zone, and specify shutdown as the name of the utility and init 0 as the state global# zlogin my-zone shutdown -y -g0 -i 0

• Question 23:

  Which three options accurately describe Oracle Solaris 11 zones?

  A. can be NFS servers
  B. are whole root type only
  C. cannot have their own time zone setting
  D. can execute z　 and zpool commands (from a non-global zone)
  E. are virtualized operating system environments, each with its own dedicated OS and kernel
  F. are virtualized operating system environments, created with a single instance of the OS shared kernel
  A. can be NFS servers
  D. can execute z　 and zpool commands (from a non-global zone)
  F. are virtualized operating system environments, created with a single instance of the OS shared kernel

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  A: Zones can use Oracle Solaris 11 products and features such as the following: Oracle Solaris ZFS encryption Network virtualization and QoS CIFS and NFS

  C: Non-global zones cannot modify the system clock by default, but each zone can have a separate time zone setting.

  F (not E): The Oracle Solaris Zones partitioning technology is used to virtualize operating system services and provide an isolated and secure environment for running applications. A zone is a virtualized operating system environment created within a single instance of the Oracle Solaris operating system.

• Question 24:

  Subnets are created by using________.

  A. subnet
  B. netmask
  C. unicast
  D. broadcast
  B. netmask

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  The process of subnetting involves the separation of the network and subnet portion of an address from the host identifier. This is performed by a bitwise AND operation between the IP address and the (sub)network prefix. The result yields the network address or prefix, and the remainder is the host identifier.

  The routing prefix of an address is written in a form identical to that of the address itself. This is called the network mask, or netmask, of the address. For example, a specification of the most-significant 18 bits of an IPv4 address, 11111111.11111111.11000000.00000000, is written as 255.255.192.0.

• Question 25:

  A datalink can best be described as______.

  A. a driver for a Network Interface Card
  B. the software connecting the Internet Layer and the Physical Layer
  C. a device that provides Classless Inter-Domain Routing
  D. a logical object used for IP Multipathing
  D. a logical object used for IP Multipathing

  ---

  The command dladm is used to configure data-link interfaces in Sun Solaris. A configured data-link is represented in the system as interface that can be used for TCP/IP. Each data- link relies on either a single network device or an link aggregation device to send and recieve packets.

  Network interfaces provide the connection between the system and the network. These interfaces are configured over data links, which in turn correspond to instances of hardware devices in the system.

  In the current model of the network stack, interfaces and links on the software layer build on the devices in the hardware layer. More specifically, a hardware device instance in the hardware layer has a corresponding link on the data-link layer

  and a configured interface on the interface layer. This one-to-one relationship among the network device, its data link, and the IP interface is illustrated in the figure that follows.

  Network Stack Showing Network Devices, Links, and Interfaces:

  

• Question 26:

  The core dump configuration in your non global zone is

  

  A user is running a process in a non-global zone (testzone) and the process crashes. The process information is: user126632618017:46:42pts/20:00/usr/bin/bash When the user's process crashes in testzone, a non-global zone, where will the core dump be saved?

  A. The file will be stored in the non-global zone's directory: /var/core/pprocess/core.hash.2663.
  B. The file will be saved in the global zone's directory: /var/core/core.bash.2663.
  C. A core file cannot be generated in a non-global zone because it shares the kernel with the global zone.
  D. The file will be stored in the global zone's directory: /var/core/pprocess/core.bash.2663.
  E. The file will be saved in non-global zone's directory: /var/core/core.bash.2663
  E. The file will be saved in non-global zone's directory: /var/core/core.bash.2663

  ---

  The line init core file pattern: /var/core/core.%f.%p will be used for the non-global process to determine the destination of the dump file.

  Note: When a process is dumping core, up to three core files can be produced: one in the per-process location, one in the system-wide global location, and, if the process was running in a local (non-global) zone, one in the global location for the zone in which that process was running.

• Question 27:

  Given the following output of the zpool status command:

  

  Identify the correct statement regarding pool1's configuration.

  A. Data written to pool1 will be stripped across four disk components.
  B. The rsdz1-0 and c3t640 components are submirrors of pool1.
  C. Data will only be stripped across the three disks in rsidz configuration.
  D. The configuration is a bug in Solaris 11; it cannot be created by an administrator.
  B. The rsdz1-0 and c3t640 components are submirrors of pool1.

• Question 28:

  Choose three options that describe the features associated with a Live Media installation.

  A. does not allow the root user to log in to the system directly from the console (or any terminal)
  B. provides a "hands free" installation
  C. installs the desktop based packages
  D. can be used to install only x86 platforms
  E. installs the server-based set of packages only
  F. allows both automatic and manual configuration of the network
  G. installs both the server-based and desktop-based package
  B. provides a "hands free" installation
  C. installs the desktop based packages
  D. can be used to install only x86 platforms

  ---

  The graphical installer is officially known as the "Live Media." This means that Oracle Solaris can be booted into RAM, causing zero impact on your existing operating system. After it is loaded, you are free to experiment with Oracle Solaris to determine whether it is something you would like to install to your system.

  You can download Oracle Solaris 11 Live Media for x86, which is an approximately 800 MB image file, and use a DVD burner to create the disk, or you can use the ISO image directly in a virtual machine or through the Oracle Integrated Lights Out Manager (ILOM) Remote Console.

  The Live Media is not intended for long-term use. For example, any changes that you make to the system are lost when the system is shut down. Therefore, the next logical step is to install Oracle Solaris on the system, which the Live Media makes easy by placing an Install Oracle Solaris icon right on the desktop. But before we head down that road, let's step back a bit and consider the installation options.

  Note: The Live Media provides administrators with an opportunity to explore the Oracle Solaris 11 environment without installing it on a system. The system boots off the media directly allowing administrators to start the installer should they choose to install it to a system.

• Question 29:

  You are installing the Solaris 11 Operation System by using the Text Installer. A panel prompts you to create a root password and a user account. Which four describe your options for completing this panel of the Installation?

  A. Creating a user account is optional.
  B. The root password must be set and cannot be blank.
  C. The root password can be left blank.
  D. If you provide a username, that user is assigned the root role.
  E. If you provide a username, that user is given root privileges.
  F. If you provide a username, root is an account rather than a role and is set to expire immediately.
  G. If you do not provide a username, root is an account rather than a role and is set to expire immediately.
  A. Creating a user account is optional.
  B. The root password must be set and cannot be blank.
  D. If you provide a username, that user is assigned the root role.
  G. If you do not provide a username, root is an account rather than a role and is set to expire immediately.

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  A: You are not required to create a user account.

  B: You must create a root password.

  D: If you create a user account in this panel, you need to provide both the user's password and a root password. In this case, root will be a role assigned to the user.

  G: If you do not create a user account, you still need to provide a root password. In this case, root will be a regular user.

• Question 30:

  Select two correct statements about the authentication services available in Oracle Solaris 11.

  A. Pluggable Authentication Modules (PAM) is used to control the operation of services such console logins and ftp.
  B. The Secure Shell can be configured to allow logins across a network to remote servers without transmitting passwords across the network.
  C. Secure Remote Procedure Calls (Secure RPC) provides a mechanism to encrypt data on any IP Socket connection.
  D. Pluggable Authentication Modules (PAM) is used to implement the Secure Shell in Oracle Solaris 11.
  E. Simple Authentication and Security Layer (SASL) provides a mechanism to authenticate and encrypt access to local file system data.
  A. Pluggable Authentication Modules (PAM) is used to control the operation of services such console logins and ftp.
  E. Simple Authentication and Security Layer (SASL) provides a mechanism to authenticate and encrypt access to local file system data.

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  A: Pluggable Authentication Modules (PAM) are an integral part of the authentication mechanism for the Solaris. PAM provides system administrators with the ability and flexibility to choose any authentication service available on a system to perform end-user authentication.

  By using PAM, applications can perform authentication regardless of what authentication method is defined by the system administrator for the given client. PAM enables system administrators to deploy the appropriate authentication mechanism for each service throughout the network. System administrators can also select one or multiple authentication technologies without modifying applications or utilities. PAM insulates application developers from evolutionary improvements to authentication technologies, while at the same time allowing deployed applications to use those improvements.

  PAM employs run-time pluggable modules to provide authentication for system entry services.

  E: The Simple Authentication and Security Layer (SASL) is a method for adding authentication support to connection-based protocols. Simple Authentication and Security Layer (SASL) is a framework for authentication and data security in Internet protocols. It decouples authentication mechanisms from application protocols, in theory allowing any authentication mechanism supported by SASL to be used in any application protocol that uses SASL. Authentication mechanisms can also support proxy authorization, a facility allowing one user to assume the identity of another. They can also provide a data security layer offering data integrity and data confidentiality services. DIGEST-MD5 provides an example of mechanisms which can provide a data-security layer. Application protocols that support SASL typically also support Transport Layer Security (TLS) to complement the services offered by SASL.