Networking Interview Questions and Answers

Networking Interview Questions and Answers

i was search on the Internet and i found this source so i would like to know what do you think about thees questions and the answers does it help

1. What is an Object server?

With an object server, the Client/Server application is written as a set of communicating objects. Client object communicate with server objects using an Object Request Broker (ORB). The client invokes a method on a remote object. The ORB locates an instance of that object server class, invokes the requested method and returns the results to the client object. Server objects must provide support for concurrency and sharing. The ORB brings it all together.

2. What is a Transaction server?

With a transaction server, the client invokes remote procedures that reside on the server with an SQL database engine. These remote procedures on the server execute a group of SQL statements. The network exchange consists of a single request/reply message. The SQL statements either all succeed or fail as a unit.

3. What is a Database Server?

With a database server, the client passes SQL requests as messages to the database server. The results of each SQL command are returned over the network. The server uses its own processing power to find the request data instead of passing all the records back to the client and then getting it find its own data. The result is a much more efficient use of distributed processing power. It is also known as SQL engine.

. What are the most typical functional units of the Client/Server applications?
User interface
Business Logic and
Shared data.

5. What are all the Extended services provided by the OS?
Ubiquitous communications
Network OS extension
Binary large objects (BLOBs)
Global directories and Network yellow pages
Authentication and Authorization services
System management
Network time
Database and transaction services
Internet services
Object- oriented services

6. What are Triggers and Rules?

Triggers are special user defined actions usually in the form of stored procedures, that are automatically invoked by the server based on data related events. It can perform complex actions and can use the full power of procedural languages.
A rule is a special type of trigger that is used to perform simple checks on data.

7. What is meant by Transparency?

Transparency really means hiding the network and its servers from the users and even the application programmers.

8. What are TP-Lite and TP-Heavy Monitors?

TP-Lite is simply the integration of TP Monitor functions in the database engines. TP-Heavy are TP Monitors which supports the Client/Server architecture and allow PC to initiate some very complex multiserver transaction from the desktop.

9. What are the two types of OLTP?

TP lite, based on stored procedures. TP heavy, based on the TP monitors.

10. What is a Web server?

This new model of Client/Server consists of thin, protable, "universal" clients that talk to superfat servers. In the simplet form, a web server returns documents when clients ask for them by name. The clients and server communicate using an RPC-like protocol called HTTP.
11. What are Super servers?

These are fully-loaded machines which includes multiprocessors, high-speed disk arrays for intervive I/O and fault tolerant features.

12. What is a TP Monitor?

There is no commonly accepted definition for a TP monitor. According to Jeri Edwards' a TP Monitor is "an OS for transaction processing".

13. TP Monitor does mainly two things extremely well. They are Process management and Transaction management.?

They were originally introduced to run classes of applications that could service hundreds and sometimes thousands of clients. TP Monitors provide an OS - on top of existing OS - that connects in real time these thousands of humans with a pool of shared server processes.

14. What is meant by Asymmetrical protocols?

There is a many-to-one relationship between clients and server. Clients always initiate the dialog by requesting a service. Servers are passively awaiting for requests from clients.

15. What are the types of Transparencies?

The types of transparencies the NOS middleware is expected to provide are:-
Location transparency
Namespace transparency
Logon transparency
Replication transparency
Local/Remote access transparency
Distributed time transparency
Failure transparency and
Administration transparency.

16. What is the difference between trigger and rule?

The triggers are called implicitly by database generated events, while stored procedures are called explicitly by client applications.

17. What are called Transactions?

The grouped SQL statements are called Transactions (or) A transaction is a collection of actions embused with ACID properties.

18. What are the building blocks of Client/Server?
The client
The server and
Middleware.

19. Explain the building blocks of Client/Server?

The client side building block runs the client side of the application.
The server side building block runs the server side of the application.

20. The middleware buliding block runs on both the client and server sides of an application. It is broken into three categories:-
Transport stack
Network OS
Service-specific middleware.

21. What are all the Base services provided by the OS?
Task preemption
Task priority
Semaphores
Interprocess communications (IPC)
Local/Remote Interprocess communication
Threads
Intertask protection
Multiuser
High performance file system
Efficient memory management and
Dynamically linked Run-time extensions.

22. What are the roles of SQL?
SQL is an interactive query language for ad hoc database queries.
SQL is a database programming language.
SQL is a data definition and data administration language.
SQL is the language of networked database servers
SQL helps protect the data in a multi-user networked environment.
Because of these multifacted roles it plays, physicists might call SQL as "The grand unified theory of database".

23. What is Structured Query Langauge (SQL)?

SQL is a powerful set-oriented language which was developed by IBM research for the databases that adhere to the relational model. It consists of a short list of powerful, yet highly flexible, commands that can be used to manipulate information collected in tables. Through SQL, we can manipulate and control sets of records at a time.

24. What are the characteristics of Client/Server?
Service
Shared resources
Asymmentrical protocols
Transparency of location
Mix-and-match
Message based exchanges
Encapsulation of services
Scalability
Integrity

Client/Server computing is the ultimate "Open platform". It gives the freedom to mix-and-match components of almost any level. Clients and servers are loosely coupled systems that interact through a message-passing mechanism.

25. What is Remote Procedure Call (RPC)?

RPC hides the intricacies of the network by using the ordinary procedure call mechanism familiar to every programmer. A client process calls a function on a remote server and suspends itself until it gets back the results. Parameters are passed like in any ordinary procedure. The RPC, like an ordinary procedure, is synchoronous. The process that issues the call waits until it gets the results.

Under the covers, the RPC run-time software collects values for the parameters, forms a message, and sends it to the remote server. The server receives the request, unpack the parameters, calls the procedures, and sends the reply back to the client. It is a telephone-like metaphor.

26. What are the main components of Transaction-based Systems?
Resource Manager
Transaction Manager and
Application Program.

27. What are the three types of SQL database server architecture?
Process-per-client Architecture. (Example: Oracle 6, Informix )
Multithreaded Architecture. (Example: Sybase, SQL server)
Hybrid Architecture (Example: Oracle 7)

28. What are the Classification of clients?

Non-GUI clients - Two types are:-
Non-GUI clients that do not need multi-tasking
(Example: Automatic Teller Machines (ATM), Cell phone)
Non-GUI clients that need multi-tasking
(Example: ROBOTs)
GUI clients
OOUI clients

29. What are called Non-GUI clients, GUI Clients and OOUI Clients?

Non-GUI Client: These are applications, generate server requests with a minimal amount of human interaction.
GUI Clients: These are applicatoins, where occassional requests to the server result from a human interacting with a GUI
(Example: Windows 3.x, NT 3.5)
OOUI clients : These are applications, which are highly-iconic, object-oriented user interface that provides seamless access to information in very visual formats.
(Example: MAC OS, Windows 95, NT 4.0)

30. What is Message Oriented Middleware (MOM)?

MOM allows general purpose messages to be exchanged in a Client/Server system using message queues. Applications communicate over networks by simply putting messages in the queues and getting messages from queues. It typically provides a very simple high level APIs to its services.
MOM's messaging and queuing allow clients and servers to communicate across a network without being linked by a private, dedicated, logical connection. The clients and server can run at different times. It is a post-office like metaphor.

31. What is meant by Middleware?

Middleware is a distributed software needed to support interaction between clients and servers. In short, it is the software that is in the middle of the Client/Server systems and it acts as a bridge between the clients and servers. It starts with the API set on the client side that is used to invoke a service and it covers the transmission of the request over the network and the resulting response.
It neither includes the software that provides the actual service - that is in the servers domain nor the user interface or the application login - that's in clients domain.

32. What are the functions of the typical server program?

It waits for client-initiated requests. Executes many requests at the same time. Takes care of VIP clients first. Initiates and runs background task activity. Keeps running. Grown bigger and faster.

33. What is meant by Symmentric Multiprocessing (SMP)?

It treats all processors as equal. Any processor can do the work of any other processor. Applications are divided into threads that can run concurrently on any available processor. Any processor in the pool can run the OS kernel and execute user-written threads.

34. What are Service-specific middleware?

It is needed to accomplish a particular Client/Server type of services which includes:-
Database specific middleware
OLTP specific middleware
Groupware specific middleware
Object specific middleware
Internet specific middleware and
System management specific middleware.

35. What are General Middleware?

It includes the communication stacks, distributed directories, authentication services, network time, RPC, Queuing services along with the network OS extensions such as the distributed file and print services.

36. What is meant by Asymmetric Multiprocessing (AMP)?

It imposses hierarchy and a division of labour among processors. Only one designated processor, the master, controls (in a tightly coupled arrangement) slave processors dedicated to specific functions.

37. What is OLTP?

In the transaction server, the client component usually includes GUI and the server components usually consists of SQL transactions against a database. These applications are called OLTP (Online Transaction Processing) OLTP Applications typically,
Receive a fixed set of inputs from remote clients. Perform multiple pre-compiled SQL comments against a local database. Commit the work and Return a fixed set of results.

38. What is meant by 3-Tier architecture?

In 3-tier Client/Server systems, the application logic (or process) lives in the middle tier and it is separated from the data and the user interface. In theory, the 3-tier Client/Server systems are more scalable, robust and flexible.
Example: TP monitor, Web.

39. What is meant by 2-Tier architecture?

In 2-tier Client/Server systems, the application logic is either burried inside the user interface on the client or within the database on the server.
Example: File servers and Database servers with stored procedures.

40. What is Load balancing?

If the number of incoming clients requests exceeds the number of processes in a server class, the TP Monitor may dynamically start new ones and this is called Load balancing.

41. What are called Fat clients and Fat servers?

If the bulk of the application runs on the Client side, then it is Fat clients. It is used for decision support and personal software.
If the bulk of the application runs on the Server side, then it is Fat servers. It tries to minimize network interchanges by creating more abstract levels of services.

42. What is meant by Horizontal scaling and Vertical scaling?

Horizontal scaling means adding or removing client workstations with only a slight performance impact. Vertical scaling means migrating to a larger and faster server machine or multiservers.

43. What is Groupware server?

Groupware addresses the management of semi-structured information such as text, image, mail, bulletin boards and the flow of work. These Client/Server systems have people in direct contact with other people.

44. What are the two broad classes of middleware?
General middleware
Service-specific middleware.

45. What are the types of Servers?

File servers
Database servers Transaction servers Groupware servers
Object servers Web servers.

46. What is a File server?

File servers are useful for sharing files across a network. With a file server, the client passes requests for file records over nerwork to file server.

47. What are the five major technologies that can be used to create Client/Server applications?
Database Servers
TP Monitors
Groupware
Distributed Objects
Intranets.

48. What is Client/Server?

Clients and Servers are separate logical entities that work together over a network to accomplish a task. Many systems with very different architectures that are connected together are also called Client/Server.

49. List out the benefits obtained by using the Client/Server oriented TP Monitors?
Client/Server applications development framework.
Firewalls of protection.
High availability.
Load balancing.
MOM integration.
Scalability of functions.
Reduced system cost.

50. What are the services provided by the Operating System?

Extended services - These are add-on modular software components that are layered on top of base service.

the source is : http://faq.programmerworld.net/networking/networking-interview-questions-answers.html

Hi,

Thanks very much for this comment. It help me to think about my ideals.

Tks again and pls keep posting.

You are welcome,
i wish you a good luck for you.

Good questions. To tell you the truth, most interviews I've had have never had too many technical questions, they've mostly been "what would you do in this situation" type thing. I always found my best interviews were ones that weren't so much question and answer as ones that turned into general conversations.

Hi,

I agreed with you. Good questions. It help me to think about my ideal.

Rgs.

Yeah i would agree on that less questions and more conversation can tell you about the employee itself. I would give them some questions, but give them more scenerio based stuff. What would you do in this, or when this happens, etc. Instead of textbook stuff. Great post nonetheless,

jt

Hi,

Good ideal, pls try to keep posting. I like this topic very much and I will digged this one. Tks again.

If you came to my business and gave those answers to those questions, you wouldn't get hired.

Thank you. You give a great stuff. I think every small question is important for interviews. May it will helps a lot. I like your posting. Once again thank you so much.

Regards
Interview Questions

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Best regards.

Good Job...

It will help many more.

Its very helpful for networking aspirants that answers are given in brief and not in details. Brief but explainable answers are important at the time of interview.....