UGC NET CS 2016 July – II

Question 41

Consider the following two statements : (A) Business intelligence and Data warehousing is used for forecasting and Data mining. (B) Business intelligence and Data warehousing is used for analysis of large volumes of sales data. Which one of the following options is correct ?

• (A) is true, (B) is false.
• Both (A) and (B) are true.
• (A) is false, (B) is true.
• Both (A) and (B) are false.

Question 42

Pipelining improves performance by:

• decreasing instruction latency
• eliminating data hazards
• exploiting instruction level parallelism
• decreasing the cache miss rate

Question 43

Consider the following two statements : (A) Data scrubling is a process to upgrade the quality of data, before it is moved into Data warehouse. (B) Data scrubling is a process of rejecting data from data warehouse to create indexes. Which one of the following options is correct ?

• (A) is true, (B) is false.
• (A) is false, (B) is true.
• Both (A) and (B) are false.
• Both (A) and (B) are true.

Question 44

Given the following statements: (A) Strategic value of data mining is timestamping. (B) Information collection is an expensive process in building an expert system. Which of the following options is correct?

• Both (A) and (B) are false.
• Both (A) and (B) are true.
• (A) is true, (B) is false.
• (A) is false, (B) is true.

Question 45

In _______, the bodies of the two loops are merged together to form a single loop provided that they do not make any references to each other.

• Loop unrolling
  

• Strength reduction
  

• Loop concatenation
  

• Loop jamming
  

Question 46

The following statement in ‘C’ 
int (*f())[ ]; 
declares

• a function returning a pointer to an array of integers.
  

• a function returning an array of pointers to integers.
  

• array of functions returning pointers to integers.
  

• an illegal statement.
  

Question 47

Which one of the following is correct, when a class grants friend status to another class?

• The member functions of the class generating friendship can access the members of the friend class.
• All member functions of the class granted friendship have unrestricted access to the members of the class granting the friendship.
• Class friendship is reciprocal to each other.
• There is no such concept.

Question 48

In UNIX, _________ creates three subdirectories : ‘PIS’ and two subdirectories ‘progs’ and ‘data’ from just created subdirectory ‘PIS’.

• mkdir PIS/progs PIS/data PIS
• mkdir PIS progs data
• mkdir PIS PIS/progs PIS/data
• mkdir PIS/progs data

Question 49

Optical fiber uses reflection to guide light through a channel, in which angle of incidence is ________ the critical angle.

• equal to
• less than
• greater than
• less than or equal to

Question 50

If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be:

• N
• (N - 1)
• N (N - 1) / 2
• N (N + 1) / 2