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UGC NET DEC 2013 : COMPUTER SCIENCE AND APPLICATIONS PAPER II

7 pages, 50 questions, 44 questions with responses, 58 total responses,

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PAPER-II COMPUTER SCIENCE AND APPLICATIONS Signature and Name of Invigilator 1. (Signature) __________________________ OMR Sheet No. : ............................................... (To be filled by the Candidate) (Name) ____________________________ 2. (Signature) __________________________ (Name) ____________________________ D 87 1 3 1 Time : 1 /4 hours] Number of Pages in this Booklet : 8 Instructions for the Candidates 1. Write your roll number in the space provided on the top of this page. 2. This paper consists of fifty multiple-choice type of questions. 3. At the commencement of examination, the question booklet will be given to you. In the first 5 minutes, you are requested to open the booklet and compulsorily examine it as below : (i) To have access to the Question Booklet, tear off the paper seal on the edge of this cover page. Do not accept a booklet without sticker-seal and do not accept an open booklet. (ii) Tally the number of pages and number of questions in the booklet with the information printed on the cover page. Faulty booklets due to pages/questions missing or duplicate or not in serial order or any other discrepancy should be got replaced immediately by a correct booklet from the invigilator within the period of 5 minutes. Afterwards, neither the Question Booklet will be replaced nor any extra time will be given. (iii) After this verification is over, the OMR Sheet Number should be entered on this Test Booklet. 4. Each item has four alternative responses marked (A), (B), (C) and (D). You have to darken the circle as indicated below on the correct response against each item. Example : where (C) is the correct response. 5. Your responses to the items are to be indicated in the OMR Sheet given inside the Paper I Booklet only. If you mark at any place other than in the circle in the OMR Sheet, it will not be evaluated. 6. Read instructions given inside carefully. 7. Rough Work is to be done in the end of this booklet. 8. If you write your Name, Roll Number, Phone Number or put any mark on any part of the OMR Sheet, except for the space allotted for the relevant entries, which may disclose your identity, or use abusive language or employ any other unfair means such as change of response by scratching or using white fluid, you will render yourself liable to disqualification. 9. You have to return the test question booklet and Original OMR Sheet to the invigilators at the end of the examination compulsorily and must not carry it with you outside the Examination Hall. You are, however, allowed to carry duplicate copy of OMR Sheet on conclusion of examination. 10. Use only Blue/Black Ball point pen. 11. Use of any calculator or log table etc., is prohibited. 12. There is no negative marks for incorrect answers. D-87-13 Roll No. (In figures as per admission card) Roll No.________________________________ (In words) [Maximum Marks : 100 Number of Questions in this Booklet : 50 1. 2. - 3. , - - , : (i) - - (ii) - / - - (iii) OMR - 4. (A), (B), (C) (D) : (C) 5. I OMR OMR , 6. 7. (Rough Work) 8. OMR , , , , , 9. - OMR OMR 10. / 11. ( ) 12. 1 P.T.O. COMPUTER SCIENCE AND APPLICATIONS Paper II Note : This paper contains fifty (50) objective type questions of two (2) marks each. All questions are compulsory. 3. 4. 5. An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are _______ and _______. (A) 4000 bauds \ sec & 1000 bps (B) 2000 bauds \ sec & 1000 bps (C) 1000 bauds \ sec & 500 bps (D) 1000 bauds \ sec & 4000 bps The relationship of data elements in a module is called (A) Coupling (B) Modularity (C) Cohesion (D) Granularity 8. Encryption and Decryption is the responsibility of _______ Layer. (A) Physical (B) Network (C) Application (D) Datalink FAN IN of a component A is defined as (A) Number of components that can call or pass control to component A. (B) Number of components that are called by component A. (C) Number of components related to component A. (D) Number of components dependent on component A. 7. When data and acknowledgement are sent in the same frame, this is called as (A) Piggy packing (B) Piggy backing (C) Back packing (D) Good packing 2. 6. Software Configuration Management is the discipline for systematically controlling (A) the changes due to the evolution of work products as the project proceeds. (B) the changes due to defects (bugs) being found and then fixed. (C) the changes due to requirement changes (D) all of the above 9. 1. Which one of the following is not a step of requirement engineering ? (A) Requirement elicitation (B) Requirement analysis (C) Requirement design (D) Requirement documentation The VLF and LF bauds use _______ propagation for communication. (A) Ground (B) Sky (C) Line of sight (D) Space Using the RSA public key crypto system, if p = 13, q = 31 and d = 7, then the value of e is (A) 101 (B) 103 (C) 105 (D) 107 Paper-II 2 D-87-13 10. Testing of software with actual data and in actual environment is called (A) Alpha testing (B) Beta testing (C) Regression testing (D) None of the above 11. The student marks should not be greater than 100. This is (A) Integrity constraint (B) Referential constraint (C) Over-defined constraint (D) Feasible constraint 12. GO BOTTOM and SKIP-3 commands are given one after another in a database file of 30 records. It shifts the control to (A) 28th record (B) 27th record (C) 3rd record (D) 4th record 13. 14. 15. 16. D-87-13 Which of the following operators can not be overloaded in C+ + ? (A) (B) + = (C) = = (D) : : 19. _________ allows to create classes which are derived from other classes, so that they automatically include some of its parent s members, plus its own members. (A) Overloading (B) Inheritance (C) Polymorphism (D) Encapsulation 20. 3 Which of the following compilation error in C ? (A) int n = 32 ; (B) char ch = 65 ; (C) float f = (float) 3.2 ; (D) none of the above 18. Based on the cardinality ratio and participation ________ associated with a relationship type, choose either the Foreign Key Design, the Cross Referencing Design or Mutual Referencing Design. (A) Entity (B) Constraints (C) Rules (D) Keys What does the following declaration mean ? int (*ptr) [10]; (A) ptr is an array of pointers of 10 integers. (B) ptr is a pointer to an array of 10 integers. (C) ptr is an array of 10 integers. (D) none of the above. 17. An ER Model includes I. An ER diagram portraying entity types. II. Attributes for each entity type III. Relationships among entity types. IV. Semantic integrity constraints that reflects the business rules about data not captured in the ER diagram. (A) I, II, III & IV (B) I & IV (C) I, II & IV (D) I & III Data Integrity control uses _______ (A) Upper and lower limits on numeric data. (B) Passwords to prohibit unauthorised access to files. (C) Data dictionary to keep the data (D) Data dictionary to find last access of data The correct way to round off a floating number x to an integer value is (A) y = (int) (x + 0.5) (B) y = int (x + 0.5) (C) y = (int) x + 0.5 (D) y = (int) ((int)x + 0.5) has Paper-II 21. What is the value of expression ? a b c d + (where a c = 2 and d = 5) 3 (A) 8 (B) (C) 24 (D) the postfix 26. Given the following statements : S1 : SLR uses follow information to guide reductions. In case of LR and LALR parsers, the lookaheads are associated with the items and they make use of the left context available to the parser. S2 : LR grammar is a larger subclass of context free grammar as compared to that SLR and LALR grammars. Which of the following is true ? (A) S1 is not correct and S2 is not correct. (B) S1 is not correct and S2 is correct. (C) S1 is correct and S2 is not correct. (D) S1 is correct and S2 is correct. 27. The context free grammar for the language L = {an bm | n m + 3, n 0, m 0} is (A) S aaa A; A aAb | B, B Bb | (B) S aaaA| , A aAb | B, B Bb | (C) S aaaA | aa A | , A aAb | B, B Bb| (D) S aaaA | aa A | aA | , A aAb | B, B Bb | 28. Given the following statements : S1 : If L is a regular language then = 8, b = 4, 8 3 24 22. If the queue is implemented with a linked list, keeping track of a front pointer and a rear pointer, which of these pointers will change during an insertion into a non-empty queue ? (A) Neither of the pointers change (B) Only front pointer changes (C) Only rear pointer changes (D) Both of the pointers changes 23. _______ is often used to prove the correctness of a recursive function. (A) Diagonalization (B) Communitivity (C) Mathematical Induction (D) Matrix Multiplication 24. 25. For any B-tree of minimum degree t 2, every node other than the root must have atleast ________ keys and every node can have at most ________ keys. (A) t 1, 2t + 1 (B) t + 1, 2t + 1 (C) t 1, 2t 1 (D) t + 1, 2t 1 the language {uv | u L, v LR} is also regular. S2 : L = {wwR} is regular language. Which of the following is true ? (A) S1 is not correct and S2 is not correct. (B) S1 is not correct and S2 is correct. (C) S1 is correct and S2 is not correct. (D) S1 is correct and S2 is correct. Given two sorted list of size m and n respectively. The number of comparison needed in the worst case by the merge sort algorithm will be (A) m n (B) max (m, n) (C) min (m, n) (D) m + n 1 Paper-II 4 D-87-13 29. 30. 31. 32. The process of assigning load addresses to the various parts of the program and adjusting the code and data in the program to reflect the assigned addresses is called _______. (A) Symbol resolution (B) Parsing (C) Assembly (D) Relocation 33. Which of the following derivations does a top-down parser use while parsing an input string ? The input is scanned from left to right. (A) Leftmost derivation (B) Leftmost derivation traced out in reverse (C) Rightmost derivation traced out in reverse (D) Rightmost derivation 34. F(x, y, z) = (x + y) z is given as + xy (A) x yz z+ x y z (B) xyz + xy z + xy z (C) xy z+ xy z + xy z (D) x y z + xy z+ x y z Let P(m, n) be the statement m divides n where the universe of discourse for both the variables is the set of positive integers. Determine the truth values of each of the following propositions : I. m n P(m, n), II. m n P(m, n) (A) Both I and II are true (B) Both I and II are false (C) The dual of a Boolean expression is obtained by interchanging (A) Boolean sums and Boolean products (B) Boolean sums and Boolean products or interchanging 0 s and 1 s (C) Boolean sums and Boolean products and interchanging 0 s & 1 s (D) Interchanging 0 s and 1 s I false & II true (D) I true & II false 35. Big O estimate for f(x) = (x + 1) log(x2 + 1) + 3x2 is given as (A) O(x log x) (B) O(x2) (C) O(x3) (D) O(x2 log x) 36. Given that (292)10 = (1204)x in some number system x. The base x of that number system is (A) 2 (B) 8 (C) 10 (D) None of the above D-87-13 The sum of products expansion for the function How many edges are there in a forest of t-trees containing a total of n vertices ? (A) n + t (B) n t (C) n t (D) nt 5 Paper-II 37. Let f and g be the functions from the set of integers to the set integers defined by f(x) = 2x + 3 and g(x) = 3x + 2 Then the composition of f and g and g and f is given as (A) 6x + 7, 6x + 11 (B) 6x + 11, 6x + 7 (C) 5x + 5, 5x + 5 (D) None of the above 38. Active X controls are Pentium binary programs that can be embedded in ________ (A) Word pages (B) URL pages (C) Script pages (D) Web pages 42. Match the following : List I List II a. Wireless i. HTTP Application Environment b. Wireless ii. IP Transaction Protocol c. Wireless iii. Scripts Datagram Protocol d. Wireless iv. UDP Codes : a b c d (A) ii iv i iii (B) iv iii ii i (C) iv iii i ii (D) iii i iv ii 43. Which of the following is widely used inside the telephone system for long-haul data traffic ? (A) ISDN (B) ATM (C) Frame Relay (D) ISTN 44. The document standards for EDI were first developed by large business house during the 1970s and are now under the control of the following standard organisation : (A) ISO (B) ANSI (C) ITU-T (D) IEEE If n and r are non-negative integers and n r, then p(n + 1, r) equals to p(n, r) (n + 1) (A) (n + 1 r) p(n, r) (n + 1) (B) (n 1 + r) p(n, r) (n 1) (C) (n + 1 r) p(n, r) (n + 1) (D) (n + 1 + r) 39. 41. A graph is non-planar if and only if it contains a subgraph homomorphic to (A) K3, 2 or K5 (B) K3, 3 and K6 (C) K3, 3 or K5 (D) K2, 3 and K5 40. Which of the following statements are true ? I. A circuit that adds two bits, producing a sum bit and a carry bit is called half adder. II. A circuit that adds two bits, producing a sum bit and a carry bit is called full adder. III. A circuit that adds two bits and a carry bit producing a sum bit and a carry bit is called full adder. IV. A device that accepts the value of a Boolean variable as input and produces its complement is called an inverter. (A) I & II (B) II & III (C) I, II, III (D) I, III & IV Paper-II 6 D-87-13 45. 46. 47. D-87-13 How much space will be required to store the bit map of a 1.3 GB disk with 512 bytes block size ? (A) 332.8 KB (B) 83.6 KB (C) 266.2 KB (D) 256.6 KB 50. 7 Consider a disk queue with request for input/output to block on cylinders 98, 183, 37, 122, 14, 124, 65, 67 in that order. Assume that disk head is initially positioned at cylinder 53 and moving towards cylinder number 0. The total number of head movements using Shortest Seek Time First (SSTF) and SCAN algorithms are respectively (A) 236 and 252 cylinders (B) 640 and 236 cylinders (C) 235 and 640 cylinders (D) 235 and 252 cylinders 49. Consider a preemptive priority based scheduling algorithm based on dynamically changing priority. Larger priority number implies higher priority. When the process is waiting for CPU in the ready queue (but not yet started execution), its priority changes at a rate a = 2. When it starts running, its priority changes at a rate b = 1. All the processes are assigned priority value 0 when they enter ready queue. Assume that the following processes want to execute : Process Arrival Service ID Time Time P1 0 4 P2 1 1 P3 2 2 P4 3 1 The time quantum q = 1. When two processes want to join ready queue simultaneously, the process which has not executed recently is given priority. The finish time of processes P1, P2, P3 and P4 will respectively be (A) 4, 5, 7 and 8 (B) 8, 2, 7 and 5 (C) 2, 5, 7 and 8 (D) 8, 2, 5 and 7 The virtual address generated by a CPU is 32 bits. The Translation Look-aside Buffer (TLB) can hold total 64 page table entries and a 4-way set associative (i.e. with 4cache lines in the set). The page size is 4 KB. The minimum size of TLB tag is (A) 12 bits (B) 15 bits (C) 16 bits (D) 20 bits 48. Electronic Data Interchange Software consists of the following four layers : (A) Business application, Internal format conversion, Network translator, EDI envelope (B) Business application, Internal format conversion, EDI translator, EDI envelope (C) Application layer, Transport layer, EDI translator, EDI envelope (D) Application layer, Transport layer, IP layer, EDI envelope Linux operating system uses (A) Affinity Scheduling (B) Fair Preemptive Scheduling (C) Hand Shaking (D) Highest Penalty Ratio Next Paper-II Space For Rough Work Paper-II 8 D-87-13

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