UGC NET CS 2014 Dec - III

Question 71

A Trojan horse is

• A program that performs a legitimate function that is known to an operating system or its user and also has a hidden component that can be used for nefarious purposes like attacks on message security or impersonation.
• A piece of code that can attach itself to other programs in the system and spread to other systems when programs are copied or transferred.
• A program that spreads to other computer systems by exploiting security holes like weaknesses in facilities for creation of remote processes
• All of the above

Question 72

How to express that some person keeps animals as pets?

• (A)
• (B)
• (C)
• (D)

Question 73

Let R = ABCDE is a relational scheme with functional dependency set F = {A → B, B → C, AC → D}. The attribute closures of A and E are

• ABCD, φ
• ABCD, E
• Φ, φ
• ABC, E

Question 74

__________ rules used to limit the volume of log information that has to be handled and processed in the event of system failure involving the loss of volatile information.

• Write-ahead log

• Check-pointing

• Log buffer

• Thomas