“To me being American means having the opportunity to reach for our goals. It’s accepting where we come from while embracing our dreams and where we’re headed. It’s what makes America great.”
Disk access is way slower than
memory access. Caching is a technique to improve the disk access time. Block cache is a caching technique which
reduces disk accesses time. Here a
portion of disk is bought to cache for reading and a modified blocks are first
changed in cache but reflected in the disk at one go. On the other hand with write through caching
each modified block is written to cache and at the same time it is written to
the disk. Write- through caching
requires more disk I/O so they can have a negative effect on the performance.
Answer: Music, Documents, PowerPoints, Pictures/Videos, Audios
Explanation:
A computer keyboard is an input device that allows a person to enter letters, numbers, and other symbols (these are called characters in a keyboard) into a computer. It is one of the most used input devices for computers. Using a keyboard to enter lots of data is called typing
Answer:
UPDATE COMPANY
SET COMM=COMM + 500
WHERE SALES> 20000;
Explanation:
The update command is used for alter the record in the database management system in the table .The update command command modify the record on the some condition in the table in the database management system.
Following are syntax for using the update command .
UPDATE table-name
SET column name 1,column name 2 .........
Where condition
- In the given question table -name is "COMPANY" the condition is on the sales column and it update the table only when sales is more than 20000 and set the column COMM by 500.
