Computer Science CSS Paper I 2016


NOTE: (i) Part-II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART-II by selecting TWO questions from EACH SECTION.
(iii) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer book in accordance with Q. No. in the Q.Paper.
(v) No Page/Space be left blank he the answers. All the blank pages of Answer Book must be crossed.
(vi) Extra attempt of any question or any part of the attempted question will not be considered.

Q. 2. (a) Write a program to input choice from user for temperature conversion from Fahrenheit to Celsius or Celsius to Fahrenheit. After the choice, input temperature from user and display the convened answer. Sample execution of the program is given below; (6)
1. Fahrenheit to Celsius
2. Celsius to Fahrenheit
Enter your choice: 1
Enter Temperature in Fahrenheit: 98
Same Temperature in Celsius: 36.7
Press any key to continue…
(b) Which type of computer (supercomputers. mainframe computers. minicomputers, microcomputers) will suit an individual? Justify your answer. (6)
(c) Suppose you are trying to build a Student Registration System using object oriented approach. Objective of the system is to store information of course registration of students and their course results. In C++ syntax define following classes with suitable attributes each having getdata( ) and show data( ) member functions along with suitable constructor functions; (8)
Person. Teacher, Student, Course, Section, Allocation (containing information about allocation of a course to a teacher in a semester). Registration (containing information about registration of a student in course. this class will also save course result infonnation of the student). You can add more classes which you think suitable for the system.

Q. 3. (a) Define a function named monthly-profit which will calculate the monthly profit on the given investment amount. Function will take two float arguments, percent profit rate and investment amount and return the monthly profit (float). Write function prototype, function definition and a main program to demonstrate the functionality. Sample execution of the program is given below. Note that monthly profit 4000 has been calculated by the function by doing (8/100) * 50000. User can enter any values therefore write generalized function (user variables, not given values). (6)
Enter percent profit rate: 8
Enter investment amount: 50000
Monthly profit: 4000
Press Any Key to Continue….

(b) Explain and differentiate between volatile and non-volatile memory. giving examples. (6)
(c) Suppose you are trying to build a Library Information System using object oriented approach. System should be able to keep track of books issued and returned. It should be able to calculate fine if a book is late. Currently you are required to design classes i.e. not to write C-H- code but describe which class you will define, which data members you will add. which member functions you will include in those classes. Define only suitable classes and suitable attributes (data members) in C++ ntax. Names of some classes are like. Student. Teacher. Book. Issue Book etc. You can (but not required to) extend this list of four classes if you think of some other suitable classes. (8)

Q. 4. (a) Define a structure to store records of Persons. We want to store only Name, age and address of Person. Write main program to input record of one person and display ‘Young’ if its age is less than 20 or ‘Old’ if the age is greater than 50 and ‘Middle’ if the age of person is between 21 and 49. Sample execution of the main program is given below: (6)
Enter Name = Kashif
Enter Age = 19
Enter Address = H 120, St: 08, KAR.
Person is YOUNG
Press Any Key to Continue
(b) Convert given binary numbers to Decimal, Octal and Hexadecimal. (6)
(i) 100(2) (ii) 10100(2) (iii) 1001010(2)
(c) Suppose you are designing software for a Medical Store, using object oriented techniques. Decide and define classes (like ‘Person’, ‘Customer’, ‘Salesman’, ‘Purchase’ etc.) and their attributes in C++ or Java syntax. You are not required to write any member functions and main programme. You must use inheritance where suitable. (8)


Q. 5. (a) Describe the followings (no description with more than three lines); (8)
i. Sibling Nodes ii. Degree of a tree iii. Leaf Node iv. Height/ Depth of a tree v. Binary Tree vi. Full Binary Tree vii. Complete Binary Tree viii. Maximum number of nodes in a Binary Tree at level L.

(b) Find the time complexity of Binary search by resolving the recurrence (given below) using iterative substitution method. (6)
T(1) =2 if n =< 1
T(n) = 4 + T(n/2) if n>1

(c) Draw the given array in the form of binary tree. Then apply ‘Build-Heap’ Algorithm to convert the given tree in the form of Max-Heap (i.e. draw final Max-heap in the form of tree and array). Finally show execution of ‘Heap-sore algorithm by rewriting the Heap array after each iteration of the algorithm. (6)
A = {8, 14, 2, 26, 10, 12, 16, 28, 20, 7}

Q. 6. (a) Write Abstract Data Types (ADT) of Stack and Queue. Include the specifications of Add, Delete, IsEmpty, IsFull functions along with their respective functions. (8)

(b) For step count expressions n2 + 10 and 2n / 4 find breakeven point i.e. for which value of n (starting from 1,2…) second expression will become greater than value of first expression. (6)

(c) In AVL tree balance factor of every node is -1 or 0 or +1. We can calculate the balance factor as Height left-sub-tree – Height right-sub-tree. Construct AVL tree from the given data; (6)
A = {8, 14, 2, 26, 10, 12, 16, 28, 20, 7}

Q. 7. (a) Draw a diagram that illustrates the process of translating a C++ source file into an executable file. Give example of each phase depicted in your diagram of compilation process. (5)
(b) Compare and contrast among compiler, interpreter and assembler. (5)
(c) Describe Software Development Life Cycle (SDLC). Explain your answer with the help of depicting and describing different phases of pure waterfall software life cycle. (5)
(d) What is the difference between SRS document and design document? What are the contents we should contain in the SRS document and design document. (5)

Q. 8. (a) What are the purposes of Data Flow diagrams, Entity-Relationship diagrams? Give an example diagram of each. (5)
(b) Explain five properties of language using the example of English. Explain why a software language like MiniJava meets these properties as well. (5)
(c) Lexical analysis: Consider the following regular expression
r1= (A | …. |Z) * (0| …. I 9)*
Describe the language defined by r1 in English. Turn r1 into an equivalent finite automaton. Remove E-moves from the finite automation. (5)
(d) What do you mean by Context Free Grammar (CFG)? Illustrate your answer with examples. (5)


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