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Csc121: Programming And Problem- Solving Question Paper
Csc121: Programming And Problem- Solving
Course:Bachelor Of Science In Computer Science
Institution: South Eastern Kenya University question papers
Exam Year:2017
SOUTH EASTERN KENYA UNIVERSITY
UNIVERSITY EXAMINATIONS 2016/2017
SECOND SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE
IN COMPUTER SCIENCE
CSC121: PROGRAMMING AND PROBLEM- SOLVING
DATE: 11TH APRIL, 2017 TIME: 1.30 -3.30 PM
INSTRUCTIONS TO CANDIDATES
a) Answer ALL questions from section A(Compulsory)
b) Answer ANY TWO questions from section B
SECTION A (30 Marks) - Compulsory
Question One
a) Define the following terms: [2 Marks]
i) Algorithm
ii) Function overloading
b) Differentiate between pass by value and pass by reference as used in C++. [2 Marks]
c) Outline two advantages of using high-level language over low- level language. [2 Marks]
d i) Analyze the code fragment shown below, and determine the output generated after its execution.[2 Marks]
int found = 0, count = 5; if (!found || count == 0) cout << "Hatari" << endl;
cout << "count = " << count << endl;
ii) Justify your answer in (i) above [1 Mark]
e i) Outline two rules for naming a variable. [2 Marks]
ii) With the help of an example in C++; explain the difference between local and global
variables. [3 Marks]
f) Explain the meaning of the following escape sequence characters. [2 Marks]
i)\a “”
ii)\n”“
g) Write a C++ program, using for control structure that would vertically display odd numbers between 0 and 60 in descending order. [4 Marks]
h i) Draw a flowchart for a program that can be used to classify people according to age. If a
person is more than 20 years, output “Adult” [3Marks]
ii) Write a C++ program code that will implement the flowchart drawn in h
(i) above. [3 Marks]
i) Write a program in C++ that prompts the user to enter the radius of a circle, then computes and
displays the area and circumference of the circle. [4 Marks]
SECTION B (40 Marks): ANSWER ANY TWO QUESTIONS
Question Two
a i) Define the term pointer. [1 Mark]
ii) With the aid of example, explain how to define pointer variables in C++. [4 Marks]
b) Describe the hierarchy of C++ data types. [6 Marks]
c) Write a C++ program that prompts the user to enter two numbers, then calculates and displays
the sum, product, difference, and modulus of those two numbers. [4 Marks]
d) Write a program in C++ that prompts the user to enter temperature in Fahrenheit, convert
temperature given in degrees Fahrenheit to Celsius and then display the output on the
screen.(hint: C = (F-32) * 5 / 9)[5 Marks]
Question Three
a) Outline four characteristics of a good computer program. [4 Marks]
b) Using examples, describe four categories of operators used in C++ language. [4 Marks]
c) Using a switch case, write a C++ program that prompts a user to enter student grade, the
program should then display the remark as indicated in the table below. [6 Marks]
GRADE REMARK
A DISTINCTION
B CREDIT
C CREDIT
D PASS
F FAIL
ANY OTHER INVALID GRADE
d) Write a C++ program that displays numbers that are divisible by nine between 1and 100.
[6 Marks]
Question Four
a) Explain the importance of stream classes in C++ programming. [3 Marks]
b) Study the code fragment shown below and answer the questions that follow.
int n, k = 5;
n = (100 % k ? k + 1 : k - 1);
cout << "n = " << n << " k = " << k << endl;
i) Construct a flowchart to depict the logic of the code fragment. [3 Marks]
ii) Determine the output generated when the following code fragment is executed. [2 Marks]
c) Functions play a very important role in any program.
i) Explain the term function . [2 Marks]
ii) Describe how to define and call a function. [4 Marks]
d) Write a C++ program that prompts the user to enter three numbers, then finds out and displays
the largest number of the three numbers entered. [6 Marks]
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