Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
Explanation:
1. special key combination that causes specific commands to be executed typically shortcut keys combine the ctrl or alt keys with some other keys.
2. 5 example of shortcut keys are:-
- 1. ctrl + A - select all
- 2.ctrl + B - bold
- 3. ctrl + C - copy
- 4. ctrl + U - under line
- 5. ctrl + v - paste
3. (i) open the start menu
(ii) open Windows task manager
(iii) close the currently active program
(iv) replace
(v) align center
4. the three importance of shortcut keys are :
- efficient and time saving :- using shortcut make you more efficient at doing certain task on your computer .
- multi-tasking :- being a multi Tasker is something required in life.
- health benefit :- cutting down on your mouse usage by using keyboard shortcut can help reduce the risk of RSI (Repetitive Syndrome Injury).
5. shortcut keys are very helpful because it take less time. keyboard shortcuts are generally used to expedite common operation by reducing input sequence to a few keystrokes.
Answer: Option(d) is correct option
Explanation:
At-will employment is the employment in contractual manner in which employer can fire employee without any warning or indication .They can fire employee for any cause .
- According to the question, even though Megan was hired at at-will employment base ,she does not persist much right over the company but she should not be dismissed for not performing illegal act as the reason for getting fired.This is a unfair and illegal manner of firing.
- Other options are incorrect because employer was not correct on firing her because of loyalty duty or based on legal right or with just reason.Thus, the correct option is option(d)
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Answer:
It is used in jewelry, tennis rackets, scissors, bicycle frames, surgical tools, mobile phones and some other high-performance products.
Explanation:
Titanium is a familiar metal. Titanium is as strong as steel but weights about half as much.