The two major SAS steps are data and proc.
SAS programming structure is based on two essential steps, Data and Proc.
1. The DATA step:
This involves collecting and uploading the essential data to the program memory. It is used to update, modify and edit the data in case of any errors once it has been added to a dataset. New datasets can be created from existing ones by updating, editing, and/or merging them. at the end of this step, SAS data sets are created.
2. The PROC step:
This step processes and analyses the data collected into datasets in the previous step. it is used to perform specific functions on the data. at the end of the proc step, a result or report is produced.
In a SAS code, each line of code should begin either with a DATA or PROC step.
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- Analysis: analysis is done in the PROC step.
- Content: Data or content is collected in the DATA step.
- Stat: a stat function acquires the status information regarding a specific file. Functions are performed on the datasets in the PROC step.
- Run: This command is used to execute a code.
- Import: Datasets are created by importing data from other datasets and outside.
- Print: the report produced at the end of the PROC step can be printed as a hard copy.
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Answer:
USB port
Explanation:
A mouse cable connects to a USB port.
You are able to remove it from your computer if needed and put it into a different computer or device.
Answer:
All these can be done using PKI.
Explanation:
PKI or the private key infrastructure is a new way to encrypt the data transfer or the retrieval along with the network among various terminals. The communication can be single node, hierarchical, bridge, mesh and hybrid. In the case of mesh, the connection can be established between each terminal. However, the connection can be established in between each pair via a network which can be a private network or it can be via the internet. However, the channel is required to be encrypted, or else the data can be hacked and attacks like a man in the middle attacks are quite on cards certainly. And this can be done using the PKI, which can be installed using the Certificate Authority and Public-private key pair generator. Suppose a connection is to be established between each node. And for this, you need to generate the certificate, which is generated by the Certificate Authority. And this is generally a third party like Godaddy, Verisign, etc. You can make use of the CSFFL as well. The free certificate authority Let’s Encrypt makes use of the CSFFL. And you must be using a web server as well like Apache that comes with services like OpenSSL that can be used to generate the certificate, and you can have your root Certificate Authority. That issues the certificate to the issuing certificate authority and the issuing certificate authority after registration confirmation by a person or a Robot, issues the certificate to the node which is requesting access to another node. And this certificate has the personal details of the requesting node and information about the webserver or node to which the requesting node is opting for a secure connection. The Certificate, when received by the webserver, is then matched with the certificate copy kept at the Root Certificate Authority. These days we also have the certificate revocation authority and Google has come up with Certificate transparency. So we can build our certificate authority, or we can have online certificate authority. These certificates also have the digital signature, which can be decrypted via the private key that is kept with the sender. The public key is sent to the certificate authority, and it decrypts it with the public key. And certificates are distributed among various types of trusts, which can be single, hierarchical, bridge, mesh and hybrid. And for each application, we have different certificates. Thus issues like non-repudiation, check over unauthorized access, restrict access to the resources, etc, can be ensured with the help of the PKI. And thus, we can secure the whole network at various levels like application level, transport-level, etc. Also, the company network can be bridged with the client or the business partner company if required using bridge level trust. However, we can also have a hierarchical level of trust. And thus we can secure the network using PKI and also confirm all the issues mentioned in the question are resolved. However, certificates are also being generated by Windows server 2012, and we can make use of it as well.
Answer:
Answer to the following statement is "FALSE".
Explanation:
As we can often re-download files from the program, we must be included in backups.
- It's very essential to do regular backups to minimize data loss. Technology can be reinstalled but may destroy the data permanently.
- Backup is a substitute copy of a file, software, directory or disk used for injury, degradation or loss of the original.
Sometimes, when we re-download file we have take risk to lost old files so we must take backup during re-download.
Answer:
Gain (dB)=10 log(O.P./I.P)
Also, the loss(dB) = -gain(dB) = 10 log(I.P/O.P)
which is, 50 = 10 log(I.P./10nW)
and hence, anti-log(5) = I.P/10 nW
And thus the power required by the source is antilog(5)*10nW = 1 mW
Note: Power required by the receiver is the O.P. and the power required from the source is the I.P.
Explanation:
Please check the answer.