Skip to main content

What Is JNDI?

What is a naming service?

Naming services map objects with names. It maps a reference to an object by a user friendly name. For example a machine maps its ip address. The association of an object with a name is called 'binding'. Examples : Domain Naming Service, File systems.

What is a directory service?

Searching for files and directories done by providing Directory services. A directory service is a set of names. The user and resource information and machine addresses are summarized by directory service. For example, for a given user name, the service returns the attributes of the user such as telephone no, email address etc. A directory service use the databases that specialized and hierarchical in design.

What is LDAP?

LDAP stands for Lightweight Directory Access Protocol. This is a protocol for querying and modifying directory services over TCP/IP. LDAP is an application protocol . LDAP is used for accessing and updating information in a directory. These operations include establishing sessions and disconnecting sessions. LDAP has hierarchical data format. This hierarchy usually has domain names.
Uses of LDAP
  • A large no. Of machines can have a common list of login users.
  • Reading accesses and responsiveness is fast.
  • LDAP can be used to cluster when failover occurs.

How do we use LDAP to work with a directory service?

  • At the time of creation of the databases, the existing LDAP will receive the database server instance and the database information is provided to the LDAP directory after the creation of the databases.
  • The catalog information for the server can be retrieved for the directory of LDAP, at the time of the client's connection to the database.
  • The catalogue information need not be stored locally on each machine for the clients.
  • The LDAP directory will be searched by the client applications for the needed information in order to connect to the database.

Explain the importance of JNDI.

To centralize the information storage the enterprises uses LDAP. The information is of user names, passwords, email addresses, printers, determination of database access. Multiple database management is reduced by centralizing the information.

Explain why we need JNDI if communication to systems via LDAP is possible.

Most of the operations are with databases and servers in LDAP. Using JNDI multiple dbms can be reduced by centralizing the information. The centralization of information storage is done by LDAP.
Labels:

Comments

Post a Comment

Popular posts from this blog

WebSphere MQ Interview Questions

What is MQ and what does it do? Ans. MQ stands for MESSAGE QUEUEING. WebSphere MQ allows application programs to use message queuing to participate in message-driven processing. Application programs can communicate across different platforms by using the appropriate message queuing software products. What is Message driven process? Ans . When messages arrive on a queue, they can automatically start an application using triggering. If necessary, the applications can be stopped when the message (or messages) have been processed. What are advantages of the MQ? Ans. 1. Integration. 2. Asynchrony 3. Assured Delivery 4. Scalability. How does it support the Integration? Ans. Because the MQ is independent of the Operating System you use i.e. it may be Windows, Solaris,AIX.It is independent of the protocol (i.e. TCP/IP, LU6.2, SNA, NetBIOS, UDP).It is not required that both the sender and receiver should be running on the same platform What is Asynchrony? Ans. With messag...
11 comments
Continue Reading >>>>

WebSphere MQ Interview Questions

What is MQ and what does it do? Ans. MQ stands for MESSAGE QUEUEING. WebSphere MQ allows application programs to use message queuing to participate in message-driven processing. Application programs can communicate across different platforms by using the appropriate message queuing software products. What is Message driven process? Ans . When messages arrive on a queue, they can automatically start an application using triggering . If necessary, the applications can be stopped when the message (or messages) have been processed. What are advantages of the MQ? Ans. 1. Integration. 2. Asynchrony 3. Assured Delivery 4. Scalability. How does it support the Integration? Ans . Because the MQ is independent of the Operating System you use i.e. it may be Windows, Solaris,AIX.It is independent of the protocol (i.e. TCP/IP, LU6.2, SNA, NetBIOS, UDP).It is not required that both the sender and receiver should be running on the same platform What is Asynchrony? Ans. With message queuing, the ex...
Post a Comment
Continue Reading >>>>

WebSphere MQ Series Tutorial

MQ Series : - It is an IBM web sphere product which is evolved in 1990’s. MQ series does transportation from one point to other. It is an EAI tool (Middle ware) VERSIONS :-5.0, 5.1, 5.3, 6.0, 7.0(new version). The currently using version is 6.2 Note : - MQ series supports more than 35+ operating systems. It is platform Independent. For every OS we have different MQ series software’s. But the functionality of MQ series Default path for installing MQ series is:- C: programfiles\IBM\Eclipse\SDK30 C: programfiles\IBM\WebsphereMQ After installation it will create a group and user. Some middleware technologies are Tibco, SAP XI. MQ series deals with two things, they are OBJECTS, SERVICES. In OBJECTS we have QUEUES CHANNELS PROCESS AUTHENTICATION QUERY MANAGER. In SERVICES we have LISTENERS. Objects : - objects are used to handle the transactions with the help of services. QUEUE MANAGER maint...
1 comment
Continue Reading >>>>