The appropriate response is Electrical Switches. These are electromechanical gadgets that are utilized as a part of electrical circuits to control, recognize when frameworks are outside their working reaches, flag controllers of the whereabouts of machine individuals and work pieces, give a way to manual control of machine and process capacities, control lighting, et cetera.
Wow!! that is ALOT of info,I dont think i could help with this one Umders 699 maybe someone else can sorry that i couldn`t help :)
Answer:
If you code a column list in an INSERT statement that includes a column that’s defined with a default value, you can insert the default value for that column by coding the DEFAULT keyword in the VALUES clause of the INSERT statement.
Explanation:
SQL permits insert the DEFAULT value on the columns when is required. Suppose the column has a NULL constraint(values on this column can not be set in null), then you can pass the default value.
For example:
INSERT INTO table(field1, field2, field3, field4) VALUES (10, DEFAULT, 20, DEFAULT)
Answer:
Explanation:
A disk block works by transferring data between the disk and main memory units which are called the blocks, whose size can range drastically from 512 bytes to several thousand. This data is converted to hardware-level cylinder, surface, and sector number which makes accessing the data immensely slower than accessing data in the main memory. This time constraint is also the main reason as to why accessing a disk block is so expensive.
