DCT 1093 OOP : Pre Test 1

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

        I.            i)Without programs, a computer is an empty machine. ( T / F )

      II.          ii)  Java is NOT a high-level language. ( T / F )

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

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

      V.            v)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 )

    VI.          vi)  The main method looks like this: ( T / F )

	public static void main(String[] args) {   // Statements; }

 

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

VIII.            viii)An identifier must start with a letter, an underscore (_), or a dollar sign ($). It cannot start with a digit. ( T / F )

    IX.          ix)  Logic Errors Produces incorrect result. ( T / F )

      X.            x) Run Time Error is an error that occurs during the execution of a program. ( T / F )

2. Match the following Statement / Name to its description. [8M]

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

3. Give a brief explanation for the following question. [10 M]

         I.            What is debugging? [2 marks]

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

     III.            Explain sequence, selection and iteration as used in programming. [6 marks]

4. Which of the following are invalid identifiers, why? [10 marks]

                     I.            my

                   II.            my#address

                 III.            my_address

                 IV.            my  address

                   V.            JAVA

5. Show an evaluation tree for the following expressions: [6 marks]

                    I.            10 + 2 - 2

                  II.            3 + 3 * 3 % 2

                III.            3 + 2 / 5 +2 * 4

6. (Computing the volume of a cylinder) Write an algorithm and a Java program that reads in the radius and length of a cylinder and computes its volume using the following formulas: [20 marks]

Area	= radius * radius * p
volume	= area * length

7. (Finding the largest) Write an algorithm and a java  program that two integers and find the largest. [20 marks]

1. T,F,T,T,T,T,T,T,T,T
2.

3.

4.

5.

6.

7.

Question 7
Pseudocode
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1.Input two integers (N1 and N2)
2.IF N1 bigger then N2 then
   output N1
   else
   Output N2


Flowchart
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