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Olenka [21]
3 years ago
9

In a registration database, Ross has tables for student, professor, classroom, class, class-hour. Since his campus has about 12,

000 students, when he runs queries about what student is in what class, taught by what professor in what classroom at which hour, the DBMS software will have to perform many _________
a)Axes
b)Parallels
c)Concretes
d)Joins
e)Enrolls
Computers and Technology
1 answer:
Zina [86]3 years ago
7 0

Answer:

The correct answer for the given question is option(d) i.e " joins ".

Explanation:

Joins are used in the database to combining the two or more than two tables.The data base management system (DBMS) performing the joining queries to combine the student, professor, classroom, class, class-hour tables.The join connected the two or more table by matching the columns between the tables .

Their are many types of joining in the database.

1.  Inner join.

2. Outer join .

3. Left join.

4. Natural join.

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What is the value of count after this nested FOR loop executes fully.
Alisiya [41]

Answer:

168 (although the =< must be corrected to <=)

Explanation:

int count = 0;

for (int row = 4; row <= 15; row++)

for (int col = 0; col < 13; col = col +2)

count+=2;

The inner for loop runs 7 times (for col = 0,2,4,6,8,10,12). Anything higher is not less than 13. Therefore the inner loop increments count by 2 seven times, i.e. it increments count by 14.

The outer for loop runs 12 times (for row = 4,5,6,7,8,9,10,11,12,13,14,15).

If the count is incremented by 14 twelve times, you are incrementing it by 14*12 = 168.

Therefore the count goes from 0 to 168 after the nested loops.

5 0
3 years ago
Outline the steps necessary to prepare a storage device for storing files. Identify and briefly describe the tools used to prepa
Fantom [35]

Answer:

Outline the steps necessary to prepare a storage device for storing files.

  1. Link the storage unit to a network, whether it be a laptop computer or a mobile device.
  2. Firewall it with sufficient anti-virus so that it also does not affect the linked system.
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  4. Test the file that requires to be moved to the storage device, then upload it to the storage device after anti virus is safe.
  5. Should not directly pull the storage device out of the network, select the exit device option correctly and only then remove the device after it has been accepted.

Identify and briefly describe the tools used to prepare a storage device for storing files.

<em>EFSDump -</em> Users can share encrypted files by carrying certificates by using EFSDump. It is usually very time consuming to audit the users who have privileges. But it is very simple to list users who have access to encrypted files using EFSDump.

<em>SDelete -</em> Suppose Windows operating system eliminates the index and prevents access when we delete a file. All the same, attackers can still recover the contents of the file. Files that are encrypted by EFS leave the file behind on the disk. Using the SDelete tool we can modify free space to prevent the recovery of deleted files.

Explain why file systems are critical components of an operating system. What is their purpose?

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Ex: DOS, Windows, and Unix-based operating systems all contain various file systems where data is organized in tree structure.

Usually defines the naming of files, how long the suffix can be. The file system often includes a format indicating the access to a file.

Specify the file system or file systems that would be available with that operating system.

A file system controls the mechanism by which data is stored and accessed on a disk. This deals mainly with internal disk operations such as naming files, records, directories, documentation, storage management, and other protocol accesses.

  1. FAT (File Allocation Table)
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Describe from an administrator perspective what is necessary to prepare a storage device for access by a user.

Connection to the storage unit is equipment-oriented. The Windows Explorer summary contains optical drives, USB keys and hard drives as separate devices, making it much easier to navigate a new computer.

To connect a Linux computer you must mount the drive by connecting it to a directory.

Usually mounting a device is a manual operation, since only the administrator determines which directory the system attaches to.

Graphical interfaces are seldom seen on Linux servers. When you plug a storage device into a USB port on your computer, nothing can happen.

Usually the mount command looks like mount/dev / sdb1/mnt, where /dev / sdb1 is the system and /mnt is the directory you want to mount it.

List a few ways that a user can utilize a file system.

System output can be improved not only by choosing the most appropriate file system(s) but also by using the various choices available for most file systems.

There are variations in the number of options depending on the specific file system, and some options can only be set at the time of development of the filesystem, even though it can be modified afterwards.

7 0
3 years ago
Write down a program in SNOBOL thatcalculates the factorial of 7.
Sati [7]

Answer:

         n = f = 7

loop  f = gt(n,1) f * (n = n - 1) :s(loop)

         output =  f

end

Explanation:

3 0
3 years ago
What is the answer for this
tigry1 [53]

Answer:

No, not that one. Try again.

Explanation:

string comparison is case sensitive.

8 0
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Phoenix [80]
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Hope this helped. Have a great day! :D
3 0
3 years ago
Read 2 more answers
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