U.G.C. NET Exam. June 2023 Paper-II (COMPUTER SCIENCE)

Total Questions: 80

21. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.


Correct Answer: (c) A is true but R is false
Solution:

22. Match List I with List II

Correct Answer: (c) A-III B-I C-II D-IV
Solution:

23. Answer the following question

Correct Answer: (a) 36
Solution:

24. Let R (A, B, C, D) be a relational schema with following function dependencies :

A→B, B→C
C→D and D→B
The decomposition of R into (A,B) (B, C) (B, D)

Correct Answer: (a) gives a lossless join, and is dependency preserving
Solution:

25. Consider the following finite automata F1 that accepts a language L.

Correct Answer: (b) L (F1) = L (F2)
Solution:

26. Given below are two statement:

Which of the following statement/s is/are correct with respect to virtual memory
Statement I : Address translation is performed for every logical address used during the execution of a program
Statement II : A program can execute only when all of its components are loaded in the memory
In the light of the above statement, choose the most appropriate answer from the options given below.

Correct Answer: (c) Statement I is correct but Statement II is incorrect
Solution:

Address translation is indeed performed for every logical address used during the execution of a program in virtual memory systems. So, statement I is correct.
In virtual memory systems, not all components of a program need to be loaded in to memory at once for the program to execute. This is done by loading parts of the program that are currently needed, or pages, into physical memory while the rest of the program remains on the disk. This technique is also known as demand paging. So, Statement II is incorrect.

27. There are M points on one straight line AB and n points on another straight line AC none of them being A. How many triangles can be formed with these points as vertices?

Correct Answer: (b)
Solution:

28. Given below are two statements:

Statement I : Fuzzifier is a part of a fuzzy system
Statement II : Inference engine is a part of fuzzy system
In the light of the above statement choose the most apropriate answer from the options given below.

Correct Answer: (a) Both Statement I and Statement II are correct
Solution:

Fuzzifier is indeed a component of a fuzzy system. It's responsible for converting crisp input values into fuzzy sets, which are then used for fuzzy logic reasoning. Inference engine is another essential component of a fuzzy system. It interprets the fuzzy rules and determines the fuzzy output based on the fuzzy sets obtained from the fuzzifier. So, both statement I and II are correct.

29. Consider the following statements:

(A) A database design is in BCNF if each member of the set relation schemas that constitutes the design is in BCNF
(B) A BCNF schema can have transitive dependency
(C) It is always possible to obtain a 3NF design without sacrificing a lossless join
(D) There are multivalve dependencies in 4NF

Correct Answer: (d) A, C and D only
Solution:

A BCNF (Boyce-Codd Normal form) schema, can not have any non-trivial dependencies other than superkeys. Transitive dependencies are a form of non-trivial dependencies. So, a BCNF schema cannot have transitive dependency. Hence, statement B is false while statement A, C and D are true.

30. Which of the following is not a property of a good system for representation of knowledge in a particular domain?

Correct Answer: (a) Presentation adequacy
Solution:

Knowledge Representation is a necessary component of AI. It allows programmers to convert real-world data into a language that a computer can use to develop an information system that is critical in accomplishing tasks. The following properties should be possessed by a knowledge representation system.
(i) Representational Adequacy
(ii) Inferential Adequacy
(iii) Inferential Efficiency
(iv) Acquisitional adequacy
Presentation adequacy is not a property of a good system for representation of knowledge in a particular domain.