Question
Ivory hunters were responsible for wiped out elephants
in North Africa perhaps about 1,000 years ago, in much of South Africa in the 19th century and most of West Africa by the end of the 20th century. Directions : In each question below, a sentence is given with a part of it printed in bold type. That part may contain a grammatical error. Each sentence is followed by phrases 1), 2), 3) and 4). Find out which phrase should replace the phrase given in bold to correct the error, if there is any, and to make the sentence grammatically meaningful and correct. If the sentence is correct as it is and ‘ No correction is required’ , mark 5) as the answer.Solution
Ivory hunters were responsible for wiping out elephants in North Africa perhaps about 1,000 years ago, in much of South Africa in the 19th century and most of West Africa by the end of the 20th century. - Responsible will be correctly followed by the preposition ‘for’ as in most cases.
Which type of join returns rows when there is a match in both tables?
Which SQL constraint ensures that a column cannot have NULL values?
A software defect that causes a program to produce incorrect output without crashing or displaying an error message is typically classified as a:Â
A system is in a safe state when:
A transaction that reads a value then later sees a different value because another transaction updated and committed in between experiences which anomaly?
Which of the following is a type of database index?
Which of the following is used to enforce referential integrity?
Which constraint ensures that a column contains only unique values, but allows NULL values?
In two-phase locking, a transaction releases its locks:
Which of the following illustrates an advantage of DBMS over traditional file systems?