Programming using C++ — DU B.Sc. (Prog) Physical Science courses pertaining to Computer Science Previous Year Question Papers

Semester / Type : I/ Discipline Specific Course A1 DSC 4. Parts of a question must be answered together. Section A: 30 Marks 1. a) How built-in data types are different from derived data types. Give example. 5 b) Which of the following are valid identifiers and which of the following 5 invalid identifiers? Give reasons for each. i) @count il)_count iii) 3count iv) #marks v) Marks# vi) english_marks vil) countofstudents viii): gmg4fuzj ix) wiluqfvyS x) ge7z4z c) Answer the following in one word: 5 i) An object-oriented programming language which does not allow multiple inheritance. il) The process of making an operator exhibit different behaviour in different instances is known as ? ili) Header file that contains macros and helps in debugging. iv) Header file that contains classes for identifying data types during execution. v) Header file that contains classes for stream manipulation and for matting of data streams. d) Explain under what circumstances the following statements are used (any 2.5+2.5 i) throw; ii) void fun 1 (float x) throw( iii) catch (...) e) i) Give four instances where in line function may not work. 2 ii) Explain with example if a compiler ignore the in line function 1 iii Exnlain the tradenff associated with the in line function? 2. with example. Section B: 60 Marks 2. a) Explain with example how pointer to functions is different from pointer to 5 natural numbers. The program asks the user to input a value for n and print out the sum. c) Explain the following statements with the help of an example: 2+2 i) break ii) continue 3. a) Find the error and correct the code 2*5 i) int m==40; ii) if (x = 10) cout « "Yes"; iii) float arr[5] = (1, 2, 3, 4, 5, 6); iv) int *p = &x; delete p; v) for (int i=0; i<10; 1--); b) Why are access specifiers (private, public, protected) considered a tool of 5 4. a) Write a menu driven C++ program simulating a simple Shape hierarchy. 8 Declare a base class called Shape with a virtual function area. Derive two classes, Circle and Rectangle, each overriding the area function to calculate the area of a circle and a rectangle respectively. The program will take all inputs necessary-for example, the radius for the circle and the length and width for the rectangle. The program should calculate the area and print the results. 5. a) b) Explain call-by value and call-by reference with the help of example. Write a 4+3 program to swap two numbers using these two concepts. functions. Explain how polymorphism can be achieved during run time using virtual b) Write a program using ct+ for the following numeric pyramid patter: 1 5 c) Given an array of n integers, write a user interactive program in C+t using recursive function to print all possible subsets of the array. The program should take array size and array values from the user. Differentiate between object-based programming language and object-oriented language. 6 b) Identify the error and rectify. Explain the reason also. i) Code1 3*3 #include <iostream›