1 - JustAnswer



|1. |

|What is y after the following switch statement? |

|int x = 0; |

|int y = 0; |

|switch (x + 1) { |

|   case 0: y = 0; |

|   case 1: y = 1; |

|   default: y = -1 |

|} |

|[pic]A) 1 |

|[pic]B) -1 |

|[pic]C) 0 |

|[pic]D) None of the above |

| |

|2. |

|Which of the following is a constant, according to Java naming conventions? |

|[pic]A) MAX_VALUE |

|[pic]B) Test |

|[pic]C) read |

|[pic]D) ReadInt |

| |

|3. |

|Analyze the following code: |

|double sum = 0; |

|for (double d = 0; d < 10; sum += sum + d) { |

|   d += 0.1; |

|} |

|  |

|[pic]A) The program has a syntax error because the adjustment statement is incorrect in the for loop. |

|[pic]B) The program has a syntax error because the control variable in the for loop cannot be of the double type. |

|[pic]C) The program compiles but does not stop because d would always be less than 10. |

|[pic]D) The program compiles and runs fine. |

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|4. |

|Which array initialization is correct? |

|[pic]A) int[ ] = new x int = {8, 7, 6, 5, 4}; |

|[pic]B) int[ ] x = {8, 7, 6, 5, 4}; |

|[pic]C) int x[4] = {8, 7, 6,}; |

|[pic]D) const int SIZE = 4; Int x[SIZE]; |

|[pic]E) const int SIZE = 4; int x[SIZE-4]; |

| |

|5. |

|What is k after invoking nPrint("a message", k+1)? |

|xMethod{ |

|   int k=2; |

|   nPrint("A message", k+1); |

|} |

| |

|nPrint(String message, int n){ |

|   while( n>0){ |

|   System.out.print(message); |

|   n--; |

| } |

|} |

|[pic]A) -1 |

|[pic]B) 0 |

|[pic]C) 1 |

|[pic]D) 2 |

| |

|6. |

|Which of the following outputs values from a 2-D array? |

|[pic]A) |

|for (row = 0; row < 5; row++){ |

|for (col = 0; col < 4; col++){ |

|          JOptionPane.showMessageDialog(null, table[row][column]); |

|     } |

|} |

| |

|[pic]B) |

|for (row = 5; row < 0; row++){ |

|     for (col = 0; col < 4; col++){ |

|          JOptionPane.showMessageDialog(null, table[row}[column]); |

|     } |

| |

|[pic]C) |

|for (row = 0; row < 5; row++){ |

|     for (col = 0; col < 0; col++) |

|          JOptionPane.showMessageDialog(null, table[row}[column]); |

|} |

| |

|[pic]D) |

|for (row = 0; row < 5; row++) |

|     for (col = 0; col < 4; col++) |

|          JOptionPane.showMessageDialog(null, table[row}[column]); |

| |

| |

|7. |

|Given the following statement: |

|int[ ] list = new int[10]; |

| |

|list.length has the value |

|[pic]A) 10 |

|[pic]B) 9 |

|[pic]C) The value depends on how many integers are stored in list. |

|[pic]D) None of the above |

| |

|8. |

|To declare a constant PI, you write |

|[pic]A) final static PI = 3.14159; |

|[pic]B) final float PI = 3.14159; |

|[pic]C) static double PI = 3.14159; |

|[pic]D) final double PI = 3.14159; |

| |

|9. |

|Which of the following is a possible output for 50 * Math.random()? |

|[pic]A) 0 |

|[pic]B) 50 |

|[pic]C) 100 |

|[pic]D) a and b. |

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|10. |

|Which one of the following assigns the index value to an array of 10 numbers |

|[pic]A) for (i=0;i ................
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