Answer:
The correct answer for the given question is option(B) i.e "database system"
Explanation:
Database is the collection of interrelated data .Database system is an organization of components that define and regulate the collection, storage and manage the data.Database system maintain the integrity in the database. Database system provides an interface to the database for information storage and retrieval.
Transaction is the contract between a buyer and a seller to interchange goods or services. it does not regulate the collection store the data so this option is wrong .
Structured data and management system does not store the data that define and regulate the collection in organization. So this option is also wrong
So correct answer is database system.
Answer: This element needs 3 electrons to complete its octet state
Why?:
since the electrons in 2s2 are already paired they cannot form a bond pair with electrons from other elements without hybridisation however the 3 electrons in 2p3 are unpaired so can form bond pairs with electrons from other elements without hybridisation.
Hope this helps!
Answer:
drop-down list
Explanation:
understand the definition of each of the options, and you will easily work out the answer.
See this page for differences between drop-down list and combo box: https://docs.microsoft.com/en-us/windows/win32/uxguide/ctrl-drop
Of the 4 answers, only drop-down list doesn't allow user to add own option
