Answer:
a. Data flow diagrams and flowcharts are difficult to prepare and revise using software packages.
Explanation:
A data flow diagram is a graphical description of the source and destination of data that shows how data flow within an organization.
Documentation tools are used extensively in the systems development process.
Data flow diagrams and flowcharts are the two most frequently used systems development documentation tools. Also, documentation tools save an organization both time and money.
Answer:
C: The protocols of the Internet are open and used by all devices connected to the network
Explanation: Hope this helps.
There are billions of devices connected to the Internet, and hundreds of different kinds of devices: laptops, tablets, phones, refrigerators, handheld credit card readers, and so on. Protocols (standards) ensure that the variety of devices interact with each other smoothly. There are a lot of protocols! The Internet was designed with several layers of abstraction that sort the protocols according to what part of the process they support.
d. SELECT
"SELECT" is a part of a DML statement.
What is DML?
DML, or Data Manipulation Language, is a subset of database operations used to insert, delete, and update data. A DML is frequently a sublanguage of a larger language, such as SQL; DML includes some of the language's operators. Because some users can perform both read and write selection, selecting read-only data is closely related to and sometimes considered a component of a DML.
Structured Query Language, or SQL, is a popular data manipulation language that is used to retrieve and manipulate data in a relational database. SQL allows you to perform database operations as well as create databases. SQL performs the required tasks by using specific commands such as Create, Drop, Insert, and so on.
To know more about DML, visit: brainly.com/question/25757965
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In a school or library you can find a managor or boss
Answer:
Your processor might be incompatible with motherboard
Explanation:
One major thing to keep in mind while upgrading a PC hardware is comparability among hardware. If you are using incompatible hardware it can cause issues like this. There are websites available to let you check the compatibility of different components.
As you mentioned you upgraded your cpu and motherboard. Does your motherboard has the correct version of chipset to run new cpu. Do notice if there are any beep sounds when you power up your PC. If you don't hear beeps than your motherboard might be dead.
