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1Z0-808 - Java SE 8 Programmer I - Dump Information

Vendor Name : Oracle
Exam Code : 1Z0-808
Exam Name : Java SE 8 Programmer I
Questions and Answers : 236 Q & A
Updated On : March 23, 2017
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1Z0-808 Demo and Sample

Note: Answers are below each question.
Samples are taken from full version.

1Z0-808


QUESTION: 121

Given:


And the commands: Javac Jump.java Java Jump crazy elephant is always What is the result?


  1. Lazy lion is jumping

  2. Lion is always jumping

  3. Crazy elephant is jumping

  4. Elephant is always jumping

  5. Compilation fails


Answer: B


QUESTION: 122

Which three are valid types for switch?


  1. int

  2. float

  3. double

  4. integer

  5. String

  6. Float


Answer: A, D, E


Explanation:

A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types the String class, and a few special classes that wrap certain primitive types: Character, Byte, Short, and Integer.


QUESTION: 123

Given:


This class is poorly encapsulated. You need to change the circle class to compute and return the area instead. What three modifications are necessary to ensure that the class is being properly encapsulated?


  1. Change the access modifier of the setradius () method to private

  2. Change the getArea () method public double getArea () { return area; }

  3. When the radius is set in the Circle constructor and the setRadius () method, recomputed the area and store it into the area field

  4. Change the getRadius () method: public double getRadius () { area = Math.PI * radius * radius; return radius; }


Answer: B, C, D


QUESTION: 124

Which two statements are true for a two-dimensional array?


  1. It is implemented as an array of the specified element type.

  2. Using a row by column convention, each row of a two-dimensional array must be of the same size.

  3. At declaration time, the number of elements of the array in each dimension must be specified.

  4. All methods of the class Object may be invoked on the two-dimensional array.


Answer: A, D


QUESTION: 125

Which two will compile, and can be run successfully using the command: Java fred1 hello walls


  1. Option A

  2. Option B

  3. Option C

  4. Option D


Answer: C, D


Explanation:

Throws java.lang.ArrayIndexOutOfBoundsException: 2 at certquestions.Fred1.main(Fred1.java:3)

  1. Prints out: [Ljava.lang.String;@39341183

  2. Prints out: walls


QUESTION: 126

Given:

public class TestField { int x; int y;

public void doStuff(int x, int y) { this.x = x; y =this.y;

}

public void display() { System.out.print(x + " " + y + " : ");

}

public static void main(String[] args) { TestField m1 = new TestField(); m1.x = 100; m1.y = 200;

TestField m2 = new TestField(); m2.doStuff(m1.x, m1.y); m1.display();

m2.display();

}

}

What is the result?


A. 100 200 : 100 200

B. 100 0 : 100 0 :

C. 100 200 : 100 0 :

D. 100 0 : 100 200 :


Answer: C


QUESTION: 127

Which of the following can fill in the blank in this code to make it compile? (Select 2 options.)


  1. On line 1, fill in throws

  2. On line 1, fill in throws new

  3. On line 2, fill in throw new

  4. On line 2, fill in throws

  5. On line 2, fill in throws new


Answer: A, C


Explanation:

Option A and C are the correct answer.

In a method declaration, the keyword throws is used. So here at line 1 we have to use option A.

To actually throw an exception, the keyword throw is used and a new exception is created, so at line 2 we have to use throw and new keywords, which is option C. Finally it will look like; public void method() throws Exception { throw new Exception0;}

REFERENCE : httpsy/docs.oracle.com/javase/tutorial/essential/io/fileOps.html#exception The correct answer is: On line 1, fill in throws. On line 2, fill in throw new


QUESTION: 128

Given the code fragment:

Boolean b1 = true; Boolean b2 = false; int i = 0; while (foo) { } Which one is valid as a replacement for foo?


  1. b1.compareTo(b2)

  2. i = 1

C. i == 2? -1 : 0

D. "foo".equals("bar")


Answer: D


Explanation:

Equals works fine on strings equals produces a Boolean value.


QUESTION: 129

Given:

Class A { } Class B { } Interface X { } Interface Y { }

Which two definitions of class C are valid?


  1. Class C extends A implements X { }

  2. Class C implements Y extends B { }

  3. Class C extends A, B { }

  4. Class C implements X, Y extends B { }

  5. Class C extends B implements X, Y { }


Answer: A, E


Explanation:

extends is for extending a class.

implements is for implementing an interface.

Java allows for a class to implement many interfaces.


QUESTION: 130

Given the code fragment:

System.out.printIn ("Result: " +3+5); System.out.printIn ("Result: " + (3+5)); What is the result?


  1. Result: 8 Result: 8

  2. Result: 35 Result: 8

  3. Result: 8 Result: 35

  4. Result: 35 Result: 35


Answer: B


Explanation:

In the first statement 3 and 5 are treated as strings and are simply concatenated. In the first statement 3 and 5 are treated as integers and their sum is calculated.


QUESTION: 131

Given:

public class Natural { private int i; void disp() {

while (i <= 5) {

for (int i=1; i <=5;) { System.out.print(i + " "); i++;

} i++;

}

}

public static void main(String[] args) { new Natural().disp();

}

}

What is the result?


  1. Prints 1 2 3 4 5 once

  2. Prints 1 3 5 once

  3. Prints 1 2 3 4 5 five times

  4. Prints 1 2 3 4 5 six times

  5. Compilation fails


Answer: D


Explanation:

1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5


QUESTION: 132

int i, j=0;

i = (3* 2 +4 +5 ) ;

j = (3 * ((2+4) + 5));

System.out.println("i:"+ i + "\nj":+j); What is the result?


  1. Option A

  2. Option B

  3. Option C

  4. Option D


Answer: B


QUESTION: 133

Given:


What is the output? A. 2015-03-27

B. 2015-04-27

C. 2015-02-27

  1. Compilation fails due to error at line 6.

  2. Compilation fails due to error at line 8.


Answer: A


Explanation:

To create we have used following method with LocalDate class; public static LocalDate of(intyear, int month, int dayOfMonth)

Here we need to remember that month is not zero based so if you pass 1 for month, then month will be January.

Then we have used period object of 1 day and add to date object which makes current date to next day, so final output is 2015-03-27. Hence option A is correct. docs.oracle.com/javase/tutorial/datetime/iso/datetime.html


QUESTION: 134

Given:

class MarksOutOfBoundsException extends IndexOutOfBoundsException { } public class GradingProcess {

void verify(int marks) throws IndexOutOfBoundsException { if (marks > 100) { throw new MarksOutOfBoundsException();

}

if (marks > 50) { System.out.print("Pass");

} else { System.out.print("Fail");

}

}

public static void main(String[] args) { int marks = Integer.parseInt(args[2]); try { new GradingProcess().verify(marks));

} catch(Exception e) { System.out.print(e.getClass());

}

}

}

And the command line invocation: Java grading process 89 50 104 What is the result?


  1. Pass

  2. Fail

  3. Class MarketOutOfBoundsException

  4. Class IndexOutOfBoundsException

  5. Class Exception


Answer: C


Explanation:

The value 104 will cause a MarketOutOfBoundsException


QUESTION: 135

Given:


What is the result?


  1. Marrown String out of limits JesOran

  2. Marrown String out of limits Array out of limits

  3. Marrown String out of limits

  4. Marrown NanRed JesOran


Answer: A


QUESTION: 136

Given the code in a file Traveler.java:


And the commands: Javac Traveler.java

Java Traveler Java Duke What is the result?


  1. Happy Journey! Duke

  2. Happy Journey! Java

  3. An exception is thrown at runtime

  4. The program fails to execute due to a runtime error


Answer: D


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