Final Examination Semester 3 / Year 2007

Transcription

1 Southern College Kolej Selatan 南方学院 Final Examination Semester 3 / Year 2007 COURSE : FUNDAMENTALS OF SOFTWARE DESIGN AND DEVELOPMENT COURSE CODE : PROG1003 TIME : 2 1/2 HOURS DEPARTMENT : COMPUTER SCIENCE CLASS : IT07-C, CS07-C LECTURER : NG MEE MEE Student s ID : Batch No. : Notes to candidates: 1. The question paper consists of 6 pages. 1. Section A: 10 questions (10 marks) 2. Section B: 10 questions (15 marks) 3. Section C: 2 questions (20 marks) 4. Section D: 3 questions (55 marks) 2. Answer all questions. 3. Return the question paper with your answer booklet.

2 SECTION A: TRUE OR FALSE QUESTIONS (10 X 1.0 = 10 MARKS) A1. In Java, the value of the expression 32/5.0 is 6.4. A2. Suppose x = The output of the statement System.out.println((int)(x)/2); is 7. A3. Suppose a =5. After the execution of the statement ++a; the value of a is 6. A4. The following two statements are equivalent. 1. x *=y+2; 2. x = x * y + 2; A5. The class Math is contained in the java.text package. A6. In Java,!, &&, and are called logical operators. A7. A8. The while loop int j=0; while(j<20) j++; terminates when j>20. The following for loop executes 20 times.(assume all variables are properly declared) for(i=0; i <= 20; i++) System.out.println(i); A9. Void methods have no return type. A10. Arrays have a fixed number of components.

3 SECTION B: MULTIPLE CHOICE QUESTIONS (10 X 1.5 = 15 MARKS) B 1. What is the value of the following statement? Math.pow(2,4); B 2. Which of the following methods is contained in the package java.util? B 3. Suppose x is 5 and y is 7. What is the value of the following expression? (x!=7)&&(x<=y) B 4. What is the output of the following code fragment? int x =10; if(x>15) x=0; System.out.println(x); else System.out.println(x+5); B 5. Consider the following statement. int y=!( 12 < 5 3 <= 5 && 3 > x )? 7 : 9 ; What is the value of y if x =2?

4 In structures, the computer repeats particular statements a certain number of times depending on some conditions(s). B 6. Which if the following is NOT a reserved word in Java? B 7.

5 B 8. What is the value of x after the following statements execute? int x = 5; int y = 30; do x = x*2; while(x<y); B 9. Consider the following methods. public static int minimum(int x, int y) { int smaller; if(x<y) smaller = x; else smaller = y; return smaller; Which of the following is a valid call to this method? B 10. Suppose you have the following declaration: double[] salesdata = new double[1000]; which of the following range is valid for the index of the array salesdata. (i) 0 through 999 (ii) 1 though 1000

6 SECTION C: SHORT ANSWER QUESTIONS (20 MARKS) a) Convert the while loop into for loop: (4 marks) int x = 0; while(x < 500){ System.out.println(x); x=x+5; C1. b) Examine the following code: (3 marks) int count = -2; while(count < 3){ System.out.println(count + ); count = count +1; System.out.println(); What does this code print on the monitor? c) The following program is supposed to write out the integers 10, 11, 12, 13, 14, and 15. Decide what should go in the blanks.( 3 marks) class Counter2{ public static void main(string[] args){ int j; j = ; while(j < ) { System.out.println(j); j = j + ; Answer the following questions based on the array given String[] starhotels={ Mutiara, Bay View, E&Q, Cititel, Sunway, Vistana ; (5 x 2 = 10 marks) C2. 1. what is the index of E&Q in the following array? 2. Write an expression that refers to the string E&Q within the array. 3. What is the value of the expression starhotels.length? 4. What is the index of the last item in array? 5. What is the value of the expression starhotels[4]?

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8 SECTION D: CODING (55 MARKS) Write a java program that takes 10 integers as input. The program places the even integers into an array called evenlist, the odd integers into an array called oddlist, and the negative integers into an array called negativelist. The program displays the contents of the three arrays after all of the integers have been entered. (27 marks) Sample output: D1. Write a java program that will receive the weight of a parcel and determine the delivery charge for that parcel. Calculate the charges as follows: (13 marks) D2. Parcel weight (kg) Cost per kg (RM) <2.5 kg RM3.50 per kg kg RM2.85 per kg >5 kg RM2.45 per kg Sample output

9 D3. You are considering investing RM in a savings account that yields 5% interest, and you want to forecast how your investment will grow. Assuming that you will leave all interest on deposit, develop an application that use a void method called calculate() to calculate and print the amount of money in your account at the end of each year over a period of n years. To compute these amounts, use the following formula: (15 marks) n a = p(1+r) where p is the original amount of money invested(the principal) r is the annual interest rate n is the number of years a is the amount on deposit at the end of the nth year. Sample output:

10 000