BCS1243 PP : Chapter 5 Method

Exercise

1. Write method headers for the following methods: 
2. Computing a sales commission, given the sales amount and the commission rate.
3. Printing the calendar for a month, given the month and year.
4. Computing a square root.
5. Testing whether a number is even, and returning true if it is.
6. Printing a message a specified number of times.
7. Computing the monthly payment, given the loan amount, number of years, and annual interest rate.
8. Finding the corresponding uppercase letter, given a lowercase letter.

BCS1333 : CPU SCHEDULING EXERCISE

Consider the following table 1. Four processes are arrived at time 0, with the length of the CPU burst given in milliseconds:

Process           Burst Time       _______ * Priority

P1                                15                                3

P2                                10                                1

P3                                3                                  3

P4                                5                                  2

*smaller priority number implies a higher priority

Table1 List of processes that are arrived at time 0

 The processes are assumed to have arrives in order P1,P2,P3,P4 all at time 0.

       I       Draw four (4) Gantt charts that illustrate the execution of these processes using the following scheduling algorithms: FCFS, SJF, Priority, and RR (quantum = 5).

    II.          What is the waiting time of each process of the scheduling algorithms in part I.?

  III.          Which of the algorithms in part II. results in the minimum average waiting time (over all processes)?

BCS1243 PP: Contoh Test 1

A.  Response to the following statements by circling either T (TRUE) or F (FALSE). [10M]

        I.            1. Java enables users to develop and deploy applications on the Internet for servers, desktop computers, and small hand-held devices.( T / F)

      II.            2. Java is one of language that support object oriented programming. ( T / F)

    IV.            3. Reserved words or keywords are words that have a specific meaning to the compiler and cannot be used for other purposes in the program. ( T / F)

4. System.out.println is one of the pre-defined methods in Java. ( T / F)

        I.            5. An identifier is a sequence of characters that consist of letters, digits, underscores (_), and dollar signs ($).( T / F)

B. Match the following Statement / Name to its description.

No	Statements		Description
I.	x = 1;		Constants
II.	int x = 1;		Addition
III.	double radius;		Declaring and Initializing
IV.	final int SIZE = 3;		Multiplication
V.	+		Assignment Statements
VI.	*		Remainder
VII.	%		Declaring Variables

C. Answer the following questions

         I.            What is debugging? [2 marks]

       II.            What is the difference between a constant and a variable? [2 marks]

 

D. Which of the following are invalid identifiers, why? [7 marks]

                     I.            one

                   II.            hello_there

                 III.            hello,there

                 IV.            my    Window

                   V.            JAVA

                 VI.            1234

               VII.            acct122 

E. Evaluate the following expressions: [4 marks]

                    I.            10 + 2 / 2

                  II.            3 * 3 + 3 % 2

                III.            3 + 2 / 5 + -2 * 4

                IV.            2 * (1 + -(3/4) / 2) * (2 - 6 % 3)

F. Write a java fragment for the following problems.

0.       Write a for statement to print integer 1 to 20. [example]

int I;

For (i=1; i<=10; i++)

System.out.Println(i);

I.                    Write a for statement to print integer 50 to 60. (3 marks)

II.                  Write a for statement to print the following output. (3 marks)

2               4           6             8             10