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Client-Server Computing Interview Questions & Answers - Learning Mode

Client-Server Computing Interview Questions & Answers - Learning Mode

The client-server software architecture model distinguishes client systems from server systems, which communicate over a computer network. A client-server application is a distributed system comprised of both client and server software.

Try Client-Server Computing Interview Questions & Answers - Exam Mode

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Client-Server Computing Interview Questions & Answers - Learning Mode
Try Client-Server Computing Interview Questions & Answers - Exam Mode
Question: What is meant by Asymmetrical protocols?

Answer: 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. Source:
Question: Explain the building blocks of Client/Server?

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

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. Source:
Question: What are the services provided by the Operating System?

Answer: Base services - It is a part of the standard OS.

Extended services - These are add-on modular software components that are layered on top of base service. Source:
Question: What are the two broad classes of middleware?

Answer: General middleware
Service-specific middleware. Source:
Question: What are General Middleware?

Answer: 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. Source:
Question: What is an Object server?

Answer: 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. Source:
Question: What is meant by 3-Tier architecture?

Answer: 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. Source:
Question: What are called Transactions?

Answer: The grouped SQL statements are called Transactions (or) A transaction is a collection of actions embused with ACID properties. Source:
Question: What is OLTP?

Answer: 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. Source:
Question: What are all the Extended services provided by the OS?

Answer: 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 Source:
Question: What are the building blocks of Client/Server?

Answer: The client
The server and
Middleware. Source:
Question: What are Stored procedures?

Answer: A stored procedure ia s named collection of SQL statements and procedural logic that is compiled, verified and stored in a server database. It is typically treated like any other database object. Stored procedures accept input parameters so that a single procedure can be used over the network by multiple clients using different input data. A single remote message triggers the execution of a collection of stored SQL statements. The results is a reduction of network traffic and better performance. Source:
Question: What are the roles of SQL?

Answer: 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". Source:
Question: What is meant by Symmentric Multiprocessing (SMP)?

Answer: 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. Source:
Question: What are the types of Transparencies?

Answer: 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. Source:
Question: What are the functions of the typical server program?

Answer: 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. Source:
Question: What is a TP Monitor?

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

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 Source:
Question: What is meant by Asymmetric Multiprocessing (AMP)?

Answer: 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. Source:
Question: What is a Web server?

Answer: 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. Source:
Question: What is Message Oriented Middleware (MOM)?

Answer: 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 Source:

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