Question
Three statements are given followed by three
conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: Some Skirt is Shirt All Shirt is Sweater No Sweater is Cap Conclusions: I. No Shirt is Cap II. Some Sweater is Skirt III. Some Skirt is CapSolution
All Shirt is Sweater (A) + No Sweater is Cap (E) β No Shirt is Cap (E). Hence conclusion I follows. Some Skirt is Shirt (I) + All Shirt is Sweater (A) β Some Skirt is Sweater (I). Hence conclusion II follows. Some Skirt is Sweater (I) + No Sweater is Cap (E) β Some Skirt is not Cap (E). Hence conclusion III does not follow.
In a relational database, what is a candidate key?
In two-phase locking, a transaction releases its locks:
Which of the following is a non-relational database?
Which of the following is a type of phishing attack?
Which interrupt is generated by software?
Which of the following illustrates an advantage of DBMS over traditional file systems?
Which deadlock prevention scheme allows older transactions to preempt younger ones?
Which database model represents data in a tree-like structure, where each child record has only one parent?
Which SQL command is used to retrieve data from a table?
Which constraint ensures that a column contains only unique values, but allows NULL values?