Segundo Set de Preguntas Java OCA Exam (1z0-803)

Which conditional statement would be best suited for determining the flow of code based on an int that may have a value between 1 and 10? The program must react differently for each value.

What Java code is used for declaring and initializing a null object?

Given the following code segment, what would be the output?

int value1 = 5;
int value2 = 7;
boolean bool1 = true;
boolean bool2 = false;
if (bool1 && (( value1 < value2 )|| bool2 ) && !(bool2)) {
System.out.println("Result set one");
}
else {
System.out.println("Result set two");
}

What is the output for the following Java code segment? The text in parentheses is meant to describe the whitespace and is not part of the output.

String fiveSpaces = " ";
String SCJA = "SCJA";
String lineToDisplay = "fiveSpaces + SCJA + fiveSpaces";
System.out.println(lineToDisplay.trim());

Given:

public class StringModifier {
public static void main (String[] args) {
String a = "Supercalifragilisticexpialidocious!";
String b = a.substring(x,y);
char [] c = {a.charAt(u), a.charAt(v)};
System.out.print(b + String.valueOf(c));
}
}

What integer declarations are needed to print the string fragile!?

You want to remove all leading and trailing whitespace from a string.Which method invocation will allow this to occur?

From highest precedence to lowest, which list of operators is ordered properly?

Given the following code that uses the modulus operator, what will be printed? System.out.print((24 % 8) + (10 % 7) + (100 % 99) + (38 % 6));

Given the following code segment testing the equality of two strings, what will be printed?

1. String string = "Dollar bill";
2. string.replace("Dollar bill","Silver dollar");
3. if ("Dollar bill".equals(string)) {
4. System.out.println ("I have a dollar bill.");
5. } else {
6. System.out.println ("I have a silver dollar.");
7. }

Which append declaration does not exist in Java 7?

Given:

System.out.println("A" + 1 + (1 + 1) + 1);

What will print?

Given:

StringBuilder s = new StringBuilder ("magic");
s.append("al").replace(1, 3, "us").matches("musical");
System.out.println(s);

What will be printed to standard out?

Given:

boolean value = true;
System.out.print( true || (value=false));
System.out.println(", " + value);

What is printed to standard out?

Given:

String value1 = "null";
String value2 = "null";
System.out.println(value1.equalsIgnoreCase(value2));

What result will be seen upon compilation and/or execution?