CSC201: COMPUTER PROGRAMMING 1-1ST SEMESTER 2019 SESSION-EXAM PAST QUESTION

CSC201: COMPUTER PROGRAMMNG I (2019 SESSION-FUO, 1^ST SEMESTER)

INSTRUCTION: ANSWER 4 QUESTIONS ONLY, SECTION A COMPULSORY

 

SECTION A

1.      QUESTION ONE

a.      With a skeletal program show how a program could exhibit robustness property.

b.      Given that the area of a circle is A = ∏r² where pi = 3.1412. Write a C++ program that implements a return type function and accepts radius as its only argument to calculate the area of a circle.

2.      QUESTION TWO

a.      The number 4 is well known to be an unlucky number to the Chinese. Write a C++ program that automatically assigns floor numbering to a 9-storey building built by Chinese contractor in descending order: Floor 10, Floor 9, Floor 8, Floor 7, Floor 6, Floor 5, Floor 3, Floor 2, Floor 1 and Ground floor. Note: Floor 4 is intentionally skipped by the program.

b.      Write a tax-collector routine, as follows: A family pays no tax if its income is less than $5,000. It pays a 10% tax if its income is $5,000 to $9,999, inclusive. It pays a 20% tax if the income is $10,000 to $19,999, inclusive. Otherwise, it pays a 30% tax.

SECTION B

3.      QUESTION THREE

a.      Describe the four phases a C++ program goes through from when it is written with an editor to when it is executed.

b.      Consider the sequence: 1 1 2i 3 5 8 13 21 34 … write a program that generates this type of sequence to the 100^th term.

4.      QUESTION FOUR

a.      Explain the following concepts:

                                                              i.      Linkers and Loaders

                                                            ii.      Functions and Procedures

                                                          iii.      Call by value and Call by reference

                                                           iv.      Errors and Exceptions.

b.      If a=9 and b=13, what will be output of the following skeletal program.

int k, a, b, d;

            cout<<”Please enter value for a”<<endl;

cin>>a;

            cout<<”Please enter value for b”<<endl;

cin>>b;

k = a++;

d = b--+1;

Cout<<”k = “<<k <<”a = “<<a <<”d = “<<d <<”b = “ <<b<endl;

5.      QUESTION FIVE

a.      Explain the difference between the two ways arguments can be passed to a function. Use a skeletal C++ program to demonstrate your explanation.

b.      Give reasons for the following statements; illustrate where necessary:

                                                              i.      Keywords not used as variable names.

                                                            ii.      ‘Return’ used at the end of many C++ programs

                                                          iii.      Blocks necessary in managing scopes and visibility of variables

                                                           iv.      The operating system may have a part to play in the naming of variables

                                                             v.      Continue and Break statements help in loop management