Central Board Of Secondary Education Computer Science & Applications Paper II Model Question : cbsenet.nic.in
Organisation : Central Board Of Secondary Education
Exam : National Eligibility Test (NET)
Document Type : Model/Previous Question Paper
Subject : Computer Science & Applications
Date/Year : 10.07.2016 & 28.08.2016
Website : http://cbsenet.nic.in/cbsenet/QuestionPaperJuly2016.aspx
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Paper 2 10.07.2016 : https://www.pdfquestion.in/uploads/10575-Computer.pdf
Paper 2 28.08.2016 : https://www.pdfquestion.in/uploads/10575-Computer28.pdf
Computer Science & Applications Model Question :
Note :
** This paper contains fifty (50) objective type questions of two (2) marks each.
** All questions are compulsory.
Related : Central Board Of Secondary Education NET Social Medicine & Community Health Model Question : www.pdfquestion.in/10570.html
1. How many different equivalence relations with exactly three different equivalence classes are there on a set with five elements ?
(1) 10
(2) 15
(3) 25
(4) 30
2. The number of different spanning trees in complete graph, K4 and bipartite graph, K2, 2 have ______ and _______ respectively.
(1) 14, 14
(2) 16, 14
(3) 16, 4
(4) 14, 4
3. Suppose that R1 and R2 are reflexive relations on a set A. Which of the following statements is correct ?
(1) R1 n R2 is reflexive and R1 ? R2 is irreflexive.
(2) R1 n R2 is irreflexive and R1 ? R2 is reflexive.
(3) Both R1 n R2 and R1 ? R2 are reflexive.
(4) Both R1 n R2 and R1 ? R2 are irreflexive.
4. There are three cards in a box. Both sides of one card are black, both sides of one card are red, and the third card has one black side and one red side. We pick a card at random and observe only one side. What is the probability that the opposite side is the same colour as the one side we observed ?
(1) 3/4
(2) 2/3
(3) 1/2
(4) 1/3
5. A clique in a simple undirected graph is a complete subgraph that is not contained in any larger complete subgraph. How many cliques are there in the graph shown below ?
(1) 2
(2) 4
(3) 5
(4) 6
6. Which of the following logic expressions is incorrect ?
(1) 1 + 0 = 1
(2) 1 + 1 + 1 = 1
(3) 1 + 1 + 0 = 1
(4) 1 + 1 = 0
7. The IEEE-754 double-precision format to represent floating point numbers, has a length of _____ bits.
(1) 16
(2) 32
(3) 48
(4) 64
8. Simplified Boolean equation for the following truth table is
(1) F = y–z + –yz
(2) F = x–y + –x y
(3) F = –x z + x–z
(4) F = –x z + x–z + xyz
9. The simplified form of a Boolean equation (A – B + A –BC + AC) ( –A –C + –B) is :
(1) A– B
(2) A– BC
(3) –AB
(4) ABC
10. In a positive-edge-triggered JK flip-flop, if J and K both are high then the output will be _____ on the rising edge of the clock.
(1) No change
(2) Set
(3) Reset
(4) Toggle
11. Given i = 0, j = 1, k = –1 x = 0.5, y = 0.0 What is the output of the following expression in C language ? x * y < i + j || k
(1) – 1
(2) 0
(3) 1
(4) 2
12. The following statement in ‘C’ int (*f())[ ]; declares
(1) a function returning a pointer to an array of integers.
(2) a function returning an array of pointers to integers.
(3) array of functions returning pointers to integers.
(4) an illegal statement.
13. Which one of the following is correct, when a class grants friend status to another class ?
(1) The member functions of the class generating friendship can access the members of the friend class.
(2) All member functions of the class granted friendship have unrestricted access to the members of the class granting the friendship.
(3) Class friendship is reciprocal to each other.
(4) There is no such concept.
14. When a method in a subclass has the same name and type signatures as a method in the superclass, then the method in the subclass _____ the method in the superclass.
(1) Overloads
(2) Friendships
(3) Inherits
(4) Overrides
15. What is the value returned by the function f given below when n = 100 ?
int f (int n)
{ if (n = = 0) then return n;
else
return n + f(n-2);
}
(1) 2550 (2) 2556
(3) 5220 (4) 5520
16. In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as :
(1) Referential integrity
(2) Multi-valued dependency
(3) Entity Integrity
(4) Functional dependency
17. Which of the following statement(s) is/are FALSE in the context of Relational DBMS ?
I. Views in a database system are important because they help with access control by allowing users to see only a particular subset of the data in the database.
II. E-R diagrams are useful to logically model concepts.
III. An update anomaly is when it is not possible to store information unless some other, unrelated information is stored as well.
IV. SQL is a procedural language.
(1) I and IV only
(2) III and IV only
(3) I, II and III only
(4) II, III and IV only
18. In a relational database model, NULL values can be used for all but which one of the following ?
(1) To allow duplicate tuples in the table by filling the primary key column(s) with NULL.
(2) To avoid confusion with actual legitimate data values like 0 (zero) for integer columns and ’’ (the empty string) for string columns.
(3) To leave columns in a tuple marked as ’’unknown’’ when the actual value is unknown.
(4) To fill a column in a tuple when that column does not really ”exist” for that particular tuple.
19. Consider the following two commands C1 and C2 on the relation R from an SQL database :
C1 : drop table R;
C2 : delete from R;
Which of the following statements is TRUE ?
I. Both C1 and C2 delete the schema for R.
II. C2 retains relation R, but deletes all tuples in R.
III. C1 deletes not only all tuples of R, but also the schema for R.
(1) I only
(2) I and II only
(3) II and III only
(4) I, II and III
20. Consider the following database table having A, B, C and D as its four attributes and four possible candidate keys (I, II, III and IV) for this table If different symbols stand for different values in the table (e.g., d1 is definitely not equal to d2), then which of the above could not be the candidate key for the database table ?
(1) I and III only
(2) III and IV only
(3) II only
(4) I only