The Nobel Prize for physics this year is for the discovery of the gravitational waves released by violent events in the universe such as the mergers of black holes. ________________. Since then three more detections have been made, the latest one on September 28, 2017. The discovery is due to an extremely delicate experiment. Gravitational waves were predicted by Einstein almost 100 years ago
Solution The third sentence in the paragraph starts with ‘Since then’. So, in the second sentence, some date or event must be mentioned. No other sentence other than option 4 provides such a date or event. So, undoubtedly, option 4 is correct.
In a relational database, a foreign key is used to:
What is the purpose of the SQL "GROUP BY" clause?
The purpose of the primary key in a database is to
Which of the following joins returns all rows from both tables, filling in NULL values for non-matching rows?
Which of the following is true about Information?
Which of the following memories has the shortest access times?
What does the term "normalization" refer to in the context of database design?
A collection of Data organized in a manner that allows access, retrieval & use of the data
What is the full form of DBMS?
Which of the following statements about ACID properties in a DBMS is incorrect?