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Posted By: Lenin Member Level: Diamond Posted Date: 30 May 2008
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2005 Indira Gandhi National Open University (IGNOU) Diploma Computer Applications CS04 Data Structures through C and PASCAL - June 2005 Question paper
PGDCA / MCA (I Yr)
Term-End Examination
June, 2005
CS04 : Data Structures through "C" and "PASCAL"
Time: 2 hours
Maximum Marks: 60
Note : There are five questions in this paper Question No. 1 is compulsory. Answer any three questions from the rest. All algorithms should be written nearer to 'C' or Pascal Language.
1. (a) Write an algorithm to convert an lnfix expression into Postfix expression. Also convert the following Prefix expression into a Postfix expression:
(i) // * + ABCDE
(ii) - + A * B/CDE (10)
(b) Write an algorithm to implement bubble sort, and sort the following list in ascending order by using the algorithm. (10)
14, 11, 3, 15, 18, 9
(c) Give three applications of Trees. (3)
(d) Define the following terms with a suitable example of each: (7)
(i) Tree
(ii) Depth of a Tree
(iii) Height of a Tree
(iv) length of a Tree
(v) Forest
(vi) Leaf node
(vii) Degree of a Tree
2. (a) Design an algorithm to implement a Deque using Arrays. (5)
(b) Find a minimum cost spanning tree of the following graph using PRIM'S algorithm. (5)
-----DIAGRAM-----
3. (a) L1 and L2 are two singly linked lists which are already sorted. Now, write an algorithm to concatenate L1 and L2. Ensure that the concatenated list is sorted. (5)
(b) Write a function that returns the height of an AVL tree. (5)
4. (a) Construct a Binary tree from the given Preorder as well as lnorder traversals:
Preorder * - + E AB + CD
Inorder E + A - B * C + D (5)
(b) Write an algorithm that accepts two singly linked lists L1 and L2. lt should print L3, where L3 is a singly linked list and L3 = L1 n L2. (5)
5. (a) What is a 'heap' ? Write an algorithm for the insert as well as delete heap operations. (7)
(b) List at least 3 differences between Arrays and Pointers. (3)
6. (a) Explain the following types of file organization techniques: (6)
(i) Sequential File organization
(ii) Indexed Sequential File organization
(iii) Direct File organization
(b) Write a recursive algorithm to generate a fibonacci sequence upto the nth term, where n is any integer. (4)
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