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zalisa [80]
3 years ago
10

Explain what middleware is. Name a common middleware in two-tier client/server architecture for database applications.

Computers and Technology
1 answer:
sleet_krkn [62]3 years ago
7 0

Answer: Middleware is a program that acts as the middle connection for a client and server .It helps the client and server to connect with each other for sending the request,  communication, etc. Middleware is designed in such a way that the functioning does not gets noticed by the client and server.

Example- Two-tier architecture of the client and server for database application can be the train ticket reservation. The reservation made by a people will be according to the time , the person who gets chance to access the reservation first will get the ticket while others wait in queue.

If any query regarding the reservation according to the database occurs then Java Database connectivity (JDBC) will act as the middleware for the Java data collection between the application(client section) and database (server).

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List any 5 Unix commands with their brief description?
AlexFokin [52]

Answer:

Commands: commands are also known as "programs" and the program is a set of rules that performs a specific task which is executed by a computer.

Unix is an operating system. that supports multi-tasking and multi-user functionality. Unix is most widely used in all forms of computing systems such as desktop, laptop, and servers. It provides a Graphical user interface similar to windows.

The Unix operating system there are various commands. The list of five Unix commands can be given as:

1) cal

2) date

3) banner

4) who

5) whoami

1)cal:

The cal command stands for calender. It displays the date.

Syntax:

$ cal

or

$ cal [[month] year]

Example:

$ cal 10 2019

2)date:

The date command stands for date and time. It displays the system date and time.

Syntax:

$date

or

$ date[+format]

Example:

$ date +%d/%m/%y

3) banner

The banner command stands for display the text in to a large size.

Syntax:

$banner message

Example:

$banner Unix

4) who

The who command stands for display the list of users currently logged in.

Syntax:

$who

or

$who [option] … [file][arg1]

Example:

$who

5) whoami

The whoami command stands for display the user id of the currently logged-in user.

Syntax:

$whoami

Example:

$whoami

Explanation:

1)cal command display the current month and year.

2)date command display system date and time.

3)banner command display text in large size.

4)who command display the user name who currently login.

5)whoami command display user id.

4 0
3 years ago
A network technician is able to connect the switches between two offices, but the offices cannot communicate with each other, as
Contact [7]

Answer:

C) Router

Explanation:

In computer networking, the router's function is to stand in between diferent data lines and control the flow of data packets.  When a packet arrives from one direction, it reads the address information in the header to determine its direction. Note that the data lines will contain different IP addressing scheme, so considering the scenario in the above question, since the offices use different IP schemes, a router will serve the purpose of directing data packets to allow communication.

6 0
3 years ago
________ is the set of instructions that programmers have written in a higher-level language. select one:
kicyunya [14]
The answer is a. Source Code.   It is the set of instructions that programmers have written in a higher-level language.  When a programmer types a sequence of C language<span> statements into Windows Notepad, for example, and saves the sequence as a text file, the text file is said to contain the source code. </span>
6 0
3 years ago
Data is removed at the back of the queue.a) trueb) false
alexdok [17]

Answer:

true

Explanation:

4 0
3 years ago
What is the Median Pay of Advertising, Promotions, or Marketing Managers?
NemiM [27]

Answer:

it is 125.510$ per yr but try B see if its correct

6 0
3 years ago
Read 2 more answers
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