Question 1

Suppose a Scanner object is created as follows:  Scanner input = new Scanner(System.in);  What method do you use to read an int value?  A. input.nextInt(); B. input.nextInteger(); C. input.int(); D. input.integer();

Accepted Answer

A. input.nextInt();

Question 2

The following code fragment reads in two numbers:  Scanner input = new Scanner(System.in); int i = input.nextInt(); double d = input.nextDouble();  What are the correct ways to enter these two numbers?    A. Enter an integer, a space, a double value, and then the Enter key.  B. Enter an integer, two spaces, a double value, and then the Enter key.  C. Enter an integer, an Enter key, a double value, and then the Enter key.  D. Enter a numeric value with a decimal point, a space, an integer, and then the Enter key.

Accepted Answer

A. Enter an integer, a space, a double value, and then the Enter key.  B. Enter an integer, two spaces, a double value, and then the Enter key.  C. Enter an integer, an Enter key, a double value, and then the Enter key.

Question 3

_______ is the code with natural language mixed with Java code.   A. Java program  B. A Java statement  C. Pseudocode   D. A flowchart diagram

Accepted Answer

C. Pseudocode

Question 4

If you enter 1 2 3, when you run this program, what will be the output?  import java.util.Scanner;  public class Test1 {  public static void main(String[] args) {  Scanner input = new Scanner(System.in);  System.out.print(\"Enter three numbers: \");  double number1 = input.nextDouble();  double number2 = input.nextDouble();  double number3 = input.nextDouble();   // Compute average  double average = (number1 + number2 + number3) / 3;   // Display result  System.out.println(average);  } }    A. 1.0  B. 2.0  C. 3.0  D. 4.0

Accepted Answer

B. 2.0

Question 5

What is the exact output of the following code?   double area = 3.5;  System.out.print(\"area\");  System.out.print(area);    A. 3.53.5  B. 3.5 3.5  C. area3.5  D. area 3.5

Accepted Answer

C. area3.5

Question 6

Every letter in a Java keyword is in lowercase?   A. true  B. false

Accepted Answer

A. true

Question 7

Which of the following is a valid identifier?   A. $343  B. class  C. 9X  D. 8+9  E. radius

Accepted Answer

A. $343  E. radius

Question 8

Which of the following are correct names for variables according to Java naming conventions?   A. radius  B. Radius  C. RADIUS  D. findArea  E. FindArea

Accepted Answer

A. radius  D. findArea

Question 9

Which of the following are correct ways to declare variables?   A. int length; int width;  B. int length, width;  C. int length; width;  D. int length, int width;

Accepted Answer

A. int length; int width;  B. int length, width;

Question 10

____________ is the Java assignment operator.   A. ==  B. :=  C. =  D. =:

Accepted Answer

C. =

Question 11

To assign a value 1 to variable x, you write   A. 1 = x;  B. x = 1;  C. x := 1;  D. 1 := x;  E. x == 1;

Accepted Answer

B. x = 1;

Question 12

Which of the following assignment statements is incorrect?   A. i = j = k = 1;   B. i = 1; j = 1; k = 1;  C. i = 1 = j = 1 = k = 1;  D. i == j == k == 1;

Accepted Answer

C. i = 1 = j = 1 = k = 1;  D. i == j == k == 1;

Question 13

To declare a constant MAX_LENGTH inside a method with value 99.98, you write   A. final MAX_LENGTH = 99.98;  B. final float MAX_LENGTH = 99.98;  C. double MAX_LENGTH = 99.98;  D. final double MAX_LENGTH = 99.98;

Accepted Answer

D. final double MAX_LENGTH = 99.98;

Question 14

Which of the following is a constant, according to Java naming conventions?   A. MAX_VALUE  B. Test  C. read  D. ReadInt  E. COUNT

Accepted Answer

A. MAX_VALUE  E. COUNT

Question 15

To improve readability and maintainability, you should declare _________ instead of using literal values such as 3.14159.   A. variables  B. methods  C. constants  D. classes

Accepted Answer

C. constants

Question 16

Which of these data types requires the most amount of memory?   A. long  B. int  C. short   D. byte

Accepted Answer

A. long

Question 17

To declare an int variable number with initial value 2, you write   A. int number = 2L;  B. int number = 2l;  C. int number = 2;  D. int number = 2.0;

Accepted Answer

C. int number = 2;

Question 18

If a number is too large to be stored in a variable of the float type, it _____________.   A. causes overflow  B. causes underflow  C. causes no error  D. cannot happen in Java

Accepted Answer

A. causes overflow

Question 19

Analyze the following code:  public class Test {  public static void main(String[] args) {  int n = 10000 * 10000 * 10000;  System.out.println(\"n is \" + n);  } }   A. The program displays n is 1000000000000  B. The result of 10000 * 10000 * 10000 is too large to be stored in an int variable n. This causes an overflow and the program is aborted.   C. The result of 10000 * 10000 * 10000 is too large to be stored in an int variable n. This causes an overflow and the program continues to execute because Java does not report errors on overflow.   D. The result of 10000 * 10000 * 10000 is too large to be stored in an int variable n. This causes an underflow and the program is aborted.   E. The result of 10000 * 10000 * 10000 is too large to be stored in an int variable n. This causes an underflow and the program continues to execute because Java does not report errors on underflow.

Accepted Answer

C. The result of 10000 * 10000 * 10000 is too large to be stored in an int variable n. This causes an overflow and the program continues to execute because Java does not report errors on overflow.

Question 20

What is the result of 45 / 4?   A. 10  B. 11  C. 11.25  D. 12

Accepted Answer

B. 11

Question 21

Which of the following expressions will yield 0.5?   A. 1 / 2  B. 1.0 / 2  C. (double) (1 / 2)  D. (double) 1 / 2  E. 1 / 2.0

Accepted Answer

B. 1.0 / 2  D. (double) 1 / 2  E. 1 / 2.0

Question 22

Which of the following expression results in a value 1?   A. 2 % 1  B. 15 % 4  C. 25 % 5  D. 37 % 6

Accepted Answer

D. 37 % 6

Question 23

25 % 1 is _____   A. 1  B. 2  C. 3  D. 4  E. 0

Accepted Answer

E. 0

Question 24

-25 % 5 is _____   A. 1  B. 2  C. 3  D. 4  E. 0

Accepted Answer

E. 0

Question 25

24 % 5 is _____   A. 1  B. 2  C. 3  D. 4  E. 0

Accepted Answer

E. 0

Question 26

-24 % 5 is _____   A. -1  B. -2  C. -3  D. -4  E. 0

Accepted Answer

D. -4

Question 27

-24 % -5 is _____   A. 3  B. -3  C. 4  D. -4  E. 0

Accepted Answer

D. -4

Question 28

To add a value 1 to variable x, you write   A. 1 + x = x;  B. x += 1;  C. x := 1;  D. x = x + 1;  E. x = 1 + x;

Accepted Answer

B. x += 1;  D. x = x + 1;  E. x = 1 + x;

Question 29

To add number to sum, you write (Note: Java is case-sensitive)   A. number += sum;  B. number = sum + number;  C. sum = Number + sum;  D. sum += number;  E. sum = sum + number;

Accepted Answer

D. sum += number;  E. sum = sum + number;

Question 30

Suppose x is 1. What is x after x += 2?   A. 0  B. 1  C. 2  D. 3  E. 4

Accepted Answer

D. 3

Question 31

Suppose x is 1. What is x after x -= 1?   A. 0  B. 1  C. 2  D. -1  E. -2

Accepted Answer

A. 0

Question 32

What is x after the following statements?  int x = 1; int y = 2; x *= y + 1;    A. x is 1.  B. x is 2.   C. x is 3.  D. x is 4.

Accepted Answer

C. x is 3.

Question 33

What is x after the following statements?  int x = 1; x *= x + 1;   A. x is 1.  B. x is 2.   C. x is 3.  D. x is 4.

Accepted Answer

B. x is 2.

Question 34

Math.pow(2, 3) returns __________.   A. 9  B. 8  C. 9.0  D. 8.0

Accepted Answer

D. 8.0

Question 35

Math.pow(4, 1 / 2) returns __________.   A. 2  B. 2.0  C. 0  D. 1.0  E. 1

Accepted Answer

D. 1.0

Question 36

Math.pow(4, 1.0 / 2) returns __________.   A. 2  B. 2.0  C. 0  D. 1.0  E. 1

Accepted Answer

B. 2.0

Question 37

The __________ method returns a raised to the power of b.   A. Math.power(a, b)  B. Math.exponent(a, b)  C. Math.pow(a, b)  D. Math.pow(b, a)

Accepted Answer

C. Math.pow(a, b)

Question 38

Analyze the following code.  public class Test {  public static void main(String[] args) {  int month = 09;  System.out.println(\"month is \" + month);  } }   A. The program displays month is 09  B. The program displays month is 9  C. The program displays month is 9.0  D. The program has a syntax error, because 09 is an incorrect literal value.

Accepted Answer

D. The program has a syntax error, because 09 is an incorrect literal value.

Question 39

What is y displayed in the following code?  public class Test1 {  public static void main(String[] args) {  int x = 1;  int y = x = x + 1;  System.out.println(\"y is \" + y);  } }   A. y is 0.  B. y is 1 because x is assigned to y first.  C. y is 2 because x + 1 is assigned to x and then x is assigned to y.  D. The program has a compile error since x is redeclared in the statement int y = x = x + 1.

Accepted Answer

C. y is 2 because x + 1 is assigned to x and then x is assigned to y.

Question 40

Are the following four statements equivalent? number += 1; number = number + 1; number++;  ++number;   A. Yes  B. No

Accepted Answer

A. Yes

Question 41

What is i printed? public class Test {  public static void main(String[] args) {  int j = 0;  int i = ++j + j * 5;   System.out.println(\"What is i? \" + i);  } }   A. 0  B. 1  C. 5  D. 6

Accepted Answer

D. 6

Question 42

What is i printed in the following code?  public class Test {  public static void main(String[] args) {  int j = 0;  int i = j++ + j * 5;   System.out.println(\"What is i? \" + i);  } }   A. 0  B. 1  C. 5  D. 6

Accepted Answer

C. 5

Question 43

What is y displayed in the following code?  public class Test {  public static void main(String[] args) {  int x = 1;  int y = x++ + x;  System.out.println(\"y is \" + y);  } }   A. y is 1.  B. y is 2.  C. y is 3.  D. y is 4.

Accepted Answer

C. y is 3.

Question 44

What is y displayed?  public class Test {  public static void main(String[] args) {  int x = 1;  int y = x + x++;  System.out.println(\"y is \" + y);  } }   A. y is 1.  B. y is 2.  C. y is 3.  D. y is 4.

Accepted Answer

B. y is 2.

Question 45

To assign a double variable d to a float variable x, you write   A. x = (long)d  B. x = (int)d;  C. x = d;  D. x = (float)d;

Accepted Answer

D. x = (float)d;

Question 46

What is the printout of the following code:  double x = 5.5; int y = (int)x; System.out.println(\"x is \" + x + \" and y is \" + y);   A. x is 5 and y is 6  B. x is 6.0 and y is 6.0  C. x is 6 and y is 6  D. x is 5.5 and y is 5  E. x is 5.5 and y is 5.0

Accepted Answer

D. x is 5.5 and y is 5

Question 47

Which of the following assignment statements is illegal?   A. float f = -34;  B. int t = 23;  C. short s = 10;  D. int t = (int)false;  E. int t = 4.5;

Accepted Answer

D. int t = (int)false;  E. int t = 4.5;

Question 48

What is the value of (double)5/2?   A. 2  B. 2.5  C. 3  D. 2.0  E. 3.0

Accepted Answer

B. 2.5

Question 49

What is the value of (double)(5/2)?   A. 2  B. 2.5  C. 3  D. 2.0  E. 3.0

Accepted Answer

D. 2.0

Question 50

Which of the following expression results in 45.37?   A. (int)(45.378 * 100) / 100   B. (int)(45.378 * 100) / 100.0   C. (int)(45.378 * 100 / 100)   D. (int)(45.378) * 100 / 100.0

Accepted Answer

B. (int)(45.378 * 100) / 100.0

Question 51

The expression (int)(76.0252175 * 100) / 100 evaluates to _________.   A. 76.02  B. 76  C. 76.0252175  D. 76.03

Accepted Answer

B. 76

Question 52

If you attempt to add an int, a byte, a long, and a double, the result will be a __________ value.   A. byte  B. int  C. long  D. double

Accepted Answer

D. double

Question 53

Which of the following is the correct expression of character 4?   A. 4  B. \"4\"  C. \'004\'  D. \'4\'

Accepted Answer

D. \'4\'

Question 54

A Java character is stored in __________.   A. one byte  B. two bytes  C. three bytes  D. four bytes

Accepted Answer

B. two bytes

Question 55

Suppose x is a char variable with a value \'b\'. What is the printout of the statement System.out.println(++x)?   A. a  B. b  C. c  D. d

Accepted Answer

C. c

Question 56

Which of the following statement prints smithexam1test.txt?   A. System.out.println(\"smithexam1test.txt\");  B. System.out.println(\"smithexam1test.txt\");  C. System.out.println(\"smith\"exam1\"test.txt\");  D. System.out.println(\"smith\"exam1\"test.txt\");

Accepted Answer

B. System.out.println(\"smithexam1test.txt\");

Question 57

Suppose i is an int type variable. Which of the following statements display the character whose Unicode is stored in variable i?   A. System.out.println(i);  B. System.out.println((char)i);  C. System.out.println((int)i);  D. System.out.println(i + \" \");

Accepted Answer

B. System.out.println((char)i);

Question 58

The Unicode of \'a\' is 97. What is the Unicode for \'c\'?   A. 96  B. 97  C. 98  D. 99

Accepted Answer

D. 99

Question 59

Will System.out.println((char)4) display 4?   A. Yes  B. No

Accepted Answer

B. No

Question 60

What is the printout of System.out.println(\'z\' - \'a\')?   A. 25  B. 26  C. a  D. z

Accepted Answer

A. 25

Question 61

An int variable can hold __________.   A. \'x\'  B. 120  C. 120.0  D. \"x\"  E. \"120\"

Accepted Answer

A. \'x\'  B. 120

Question 62

Which of the following assignment statements is correct?   A. char c = \'d\';  B. char c = 100;  C. char c = \"d\";  D. char c = \"100\";

Accepted Answer

A. char c = \'d\';  B. char c = 100;

Question 63

\'3\' - \'2\' + \'m\' / \'n\' is ______.   A. 0  B. 1  C. 2  D. 3

Accepted Answer

B. 1

Question 64

The expression \"Java \" + 1 + 2 + 3 evaluates to ________.   A. Java123  B. Java6  C. Java 123  D. java 123  E. Illegal expression

Accepted Answer

C. Java 123

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