1. [3 pts] What is your section number, the period your discussion meets, and the name of your discussion leader?

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1 CIS 3022 Prog for CIS Majors I September 30, 2008 Exam I Print Your Name Your Section # Total Score Your work is to be done individually. The exam is worth 105 points (five points of extra credit are available throughout the exam) and it has 17 questions. If you notice an error in any portions of the Java code provided within a question, mark through and correct the error. Unless a question directly instructs you to correct a portion of code, there are no known errors. There are times when errors within a portion of code are unnoticed. We will consider giving extra credit for any errors corrected. However, be aware there must actually be an error in the code (programming conventions do not apply). Be sure of yourself, inaccurate corrections could cause you to lose points. 1. [3 pts] What is your section number, the period your discussion meets, and the name of your discussion leader? 2. [3 pts] Describe an interpreter. - interpret for a set of HW/SW (hopefully any HW/SW) - a separate file is not created - each line of the program is interpreted one at a time - often this process will be slower, compared to a compiled program 3. [4 pts] Fill in the bit size of each type listed. Type # of Bits Type # of Bits short _16_ char _16_ long _64_ double _64_ 4. [2 pts] Our usage of Java requires both the Development Kit and the Runtime Environment. True OR False 5. [3 pts] The class Celsius has been created and placed in the file Temparature.java. Show how to compile Celsius. javac Temparature.java 6. [3 pts] What is the name of the file created after Celsius has been compiled (include any file extension)? Celsius.class 7. [3 pts] Show how to run the program compiled in Question 5. java Celsius

2 September 30, 2008 CIS 3022 Exam I Page 2 of 6 Score 8. [20 pts] Given this sample computer system, fill in the appropriate portions of each table. The system has a 5-bit program counter, an 8-bit Accumulator, and 32 bytes of addressable memory (we will only use a portion of the memory). The system utilizes the instruction set and initial memory shown here. Instruction Set Memory PC OPCODE MNEMONIC ADDRESS ORIGINAL NEW CONTENTS CONTENTS 000 HALT STAM LDAM LDAI ADDM ADDI SUBM SUBI Given this structure and starting at 00000, step through and show the execution of the system by filling in the all of the fields within the table below. If there are any changes to the 8 bytes of memory, show what they are here by placing the new contents in the NEW CONTENTS column above, next to the original contents. If the position does not change you do not need to place anything in the NEW CONTENTS column. Accumulator (before instruction) Instructio n Psuedo Code Accumulator (after instruction) Garbage or??? LDAM 8 A := Mem[01000] SUBI 9 A := A ADDM 0 A := A+Mem[00000] STAM 1 Mem[00001]:=A ADDI 5 A := A STAM 17 Mem[10001] := A HALT

3 September 30, 2008 CIS 3022 Exam I Page 3 of 6 Score 9. [12 pts] What is the value of d after each statement executes? Also, what are the values of a, b, and c after all of the statements have executed? Note that the statements are sequential, the first possibly affecting the second, possibly affecting the third, and so on. int a = 3, b = 2, c = 6, d = 4; d = (a++ % c) + d / 2; d = ++a * b % 3 + b++; d = ++b / 2 a % c++; d = 4 d = 3 d = -3 All executions complete: a = 5 b = 4 c = [6 pts] Given the variables x and y as well as their declarations, to what value do the following expressions evaluate? int x = 18, y = 7; x! = 8 y >= x!(x! = 3 && y % x > 0) Evaluation = True Evaluation = False (y = = x y!= x) Evaluation = True 11. [4 pts] Declare a variable of the type created by the expressions in the previous question. Assign the variable the result of the expression (y = = x y!= x). Then use one print statement to print to the console (command prompt) the name of your new variable. In another print statement, print an equals sign and the value of your newly declared variable. Have both print statements display on the same line in the console. boolean result = (y == x y!= x); System.out.print( result ); System.out.print( = + result);

4 September 30, 2008 CIS 3022 Exam I Page 4 of 6 Score 12. [3 pts] Using a single print statement, show how to print to the console three separate lines. On each line, place the name of a variable from Question 11 (x, y, and the one you created), followed by an equal sign and the value of the variable. System.out.println( x = +x+ \ny = +y+ \nresult = +result); 13. [8 pts] Step through this series of statements and show the output produced. Also, state the final value of x and y after all the statements have executed. int x = 9, y = 13; Output if (x % 4 = = 0) { Print B y = x + 3; Print D System.out.println( Print A ); else if (x % 4 = = 1) { y = x * 2; System.out.println( Print B ) ; else { x = x % y; System.out.println( Print C ); if (x % 3 = = 0) { x = x / 5; y = y + 2; Final Values System.out.println( Print D ); X = 1 Y = [6 pts] Using the variables declared here, either re-write on the right hand side these three lines of code using a cast if it is necessary or write none if no casting is needed. Note the statements are sequential, the second and third needing the variable declared in the first. Code: short value = 12; long result = value; Rewritten Code or None: None None double number = result; None

5 September 30, 2008 CIS 3022 Exam I Page 5 of 6 Score 15. [12 pts] Create a class BooleanResponse. The class will contain the main method. You will help the user respond to two statements. Express to the user how he or she can enter a true or false value as their response to each statement. The two statements are Pete is a Viking! and Pete is a Computer!. Your solution will print each statement and ask for the response. Upon receiving the response, place the appropriate value of true or false within a boolean variable, one boolean variable for each response. You name the two Boolean variables. class BooleanResponse { public static void main (String args[]) { char choice; boolean viking, computer; System.out.print( Please answer following questions ); System.out.println( with T for true and F for false ); System.out.println( Pete is a Viking! (T or F) ); choice = UserInput.readChar(); if ( choice == T choice == t ) viking = true; else if ( choice == F choice == f ) viking = false; else System.out.println( Invalid choice. ); System.out.println( Pete is a Computer! (T or F) ); choice = UserInput.readChar(); if ( choice == T choice == t ) computer = true; else if ( choice == F choice == f ) computer = false; else System.out.println( Invalid choice. ); 16. [1 pts] In your opinion, which is more likely, that Pete is a Viking or Computer? Why?

6 September 30, 2008 CIS 3022 Exam I Page 6 of 6 Score 17. [12 pts] Create a class Calculation. The class will contain the main method. Print to the user a character menu system, allowing a selection between three menu options: division, modulo (mod), and subtraction. Ask the user to make a selection. Then receive two double values, the first being the left operand and the second being the right operand. Finally, print to the user the result of the calculation selected. class Calculation { public static void main (String args[]) { System.out.println( Please select operations: ); System.out.println( 1) Division ); System.out.println( 2) Modulo ); System.out.println( 3) Subtraction ); System.out.print( \nyour selection: ); int choice = UserInput.readInt(); System.out.print( Please input first operand : ); double first = UserInput.readDouble(); System.out.print( Please input second operand : ); double second = UserInput.readDouble(); System.out.print( The result is ); if ( choice == 1 ) System.out.println( first / second ); else if ( choice == 2 ) System.out.println( first % second ); else if ( choice == 3 ) System.out.println( first second ); else System.out.println( not available. );