Oracle Java SE 8 Programmer I - 1z1-808 Exam Practice Test
Which two code fragments cause compilation errors? (Choose two.)
Correct Answer: B,D
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You are developing a banking module.
You have developed a class named ccMask that has a maskcc method.
Given the code fragment:
You must ensure that the maskcc method returns a string that hides all digits of the credit card number except the four last digits (and the hyphens that separate each group of four digits).
Which two code fragments should you use at line n1, independently, to achieve this requirement?
You have developed a class named ccMask that has a maskcc method.
Given the code fragment:
You must ensure that the maskcc method returns a string that hides all digits of the credit card number except the four last digits (and the hyphens that separate each group of four digits).
Which two code fragments should you use at line n1, independently, to achieve this requirement?
Correct Answer: C,D
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Given:
public class Test {
}
From which class does the Java compiler implicitly derive Test?
public class Test {
}
From which class does the Java compiler implicitly derive Test?
Correct Answer: C
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Given the classes:
* AssertionError
* ArithmeticException
* ArrayIndexOutofBoundsException
* FileNotFoundException
* IllegalArgumentException
* IOError
* IOException
* NumberFormatException
* SQLException
Which option lists only those classes that belong to the unchecked exception category?
* AssertionError
* ArithmeticException
* ArrayIndexOutofBoundsException
* FileNotFoundException
* IllegalArgumentException
* IOError
* IOException
* NumberFormatException
* SQLException
Which option lists only those classes that belong to the unchecked exception category?
Correct Answer: E
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Which two initialization statements are valid? (Choose two.)
Correct Answer: B,D
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Given the following class:
And given the following main method, located in another class:
Which three lines, when inserted independently at line n1, cause the program to print a o balance?
And given the following main method, located in another class:
Which three lines, when inserted independently at line n1, cause the program to print a o balance?
Correct Answer: B,E,H
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Given the code fragment:
What is the result?
What is the result?
Correct Answer: C
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The following grid shows the state of a 2D array:
This grid is created with the following code:
Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive X's?
This grid is created with the following code:
Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive X's?
Correct Answer: B
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Given:
package p1;
public interface DoInterface {
void method1(int n1); // line n1
}
package p3;
import p1.DoInterface;
public class DoClass implements DoInterface {
public DoClass(int p1) { }
public void method1(int p1) { } // line n2
private void method2(int p1) { } // line n3
}
public class Test {
public static void main(String[] args) {
DoInterface doi= new DoClass(100); // line n4
doi.method1(100);
doi.method2(100);
}
}
Which change will enable the code to compile?
package p1;
public interface DoInterface {
void method1(int n1); // line n1
}
package p3;
import p1.DoInterface;
public class DoClass implements DoInterface {
public DoClass(int p1) { }
public void method1(int p1) { } // line n2
private void method2(int p1) { } // line n3
}
public class Test {
public static void main(String[] args) {
DoInterface doi= new DoClass(100); // line n4
doi.method1(100);
doi.method2(100);
}
}
Which change will enable the code to compile?
Correct Answer: C
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