[Free] 2018(Jan) EnsurePass Examcollection Oracle 1z0-803 Dumps with VCE and PDF 11-20

2018 Jan Oracle Official New Released 1z0-803
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Java SE 7 Programmer I

Question No: 11


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What is the result?

  1. Shining Sun Shining Sun Shining Sun

  2. Shining Sun Twinkling Star Shining Sun

  3. Compilation fails

  4. A ClassCastException is thrown at runtime

Answer: D

Question No: 12

Given the code fragment:

Stringh1 = quot;Bobquot;;

String h2 = new String (quot;Bobquot;);

What is the best way to test that the values of h1 and h2 are the same?

  1. if (h1 = = h2)

  2. if (h1.equals(h2))

  3. if (h1 = = h2)

  4. if (h1.same(h2))

Answer: B Explanation:

The equals method compares values for equality.

Question No: 13


class MarksOutOfBoundsException extends IndexOutOfBoundsException { } public class GradingProcess {

void verify(int marks) throws IndexOutOfBoundsException { if (marks gt; 100) {

throw new MarksOutOfBoundsException();


if (marks gt; 50) {


} else { System.out.print(quot;Failquot;);



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 No: 14


public class FieldInit { char c;

booleanb; float f;

void printAll() { System.out.println(quot;c = quot; c); System.out.println(quot;c = quot; b); System.out.println(quot;c = quot; f);


public static void main(String[] args) { FieldInit f = new FieldInit(); f.printAll();



What is the result?

  1. c = null b = false

    f = 0.0F

  2. c = 0 b = false f = 0.0f

  3. c = null b = true

    f = 0.0

  4. c =

b = false f = 0.0

Answer: D

Question No: 15


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What three modifications, made independently, made to class greet, enable the code to compile and run?

  1. line 6 replaced with handy.dandy.keystroke stroke = new KeyStroke ( );

  2. line 6 replaced with handy.*.KeyStroke = new KeyStroke ( );

  3. line 6 replaced with handy.dandy.KeyStroke Stroke = new handy.dandy.KeyStroke();

  4. import handy.*; added before line 1

  5. import handy.dandy.*; added after line 1

  6. import handy.dandy,KeyStroke; added after line 1

  7. import handy.dandy.KeyStroke.typeException(); added before line 1

Answer: C,E,F Explanation:

Three separate solutions:

C: the full class path to the method must be stated (when we have not imported the package)

D: We can import the hold dandy class F: we can import the specific method

Question No: 16

public class ForTest {

public static void main(String[] args) { int[] arrar= {1,2,3};

for ( foo ) {




Which three are valid replacements for foo so that the program will compiled and run?

  1. int i: array

  2. int i = 0; i lt; 1; i

  3. ;;

D. ; i lt; 1; i

E. ; i lt; 1;

Answer: A,B,C

Question No: 17

Which two statements are true?

  1. An abstract class can implement an interface.

  2. An abstract class can be extended by an interface.

  3. An interface CANNOT be extended by another interface.

  4. An interface can be extended by an abstract class.

  5. An abstract class can be extended by a concrete class.

  6. An abstract class CANNOT be extended by an abstract class.

Answer: A,E Explanation:


Question No: 18

What is the proper way to defined a method that take two int values and returns their sum as an int value?

  1. int sum(int first, int second) { first second; }

  2. int sum(int first, second) {return first second; }

  3. sum(int first, int second) { return first second; }

  4. int sum(int first, int second) { return first second; }

  5. void sum (int first, int second) { return first second; }

Answer: D

Question No: 19

Given the code fragment:

StringBuilder sb = new StringBuilder ( ) ; Sb.append (“world”);

Which code fragment prints Hello World?

  1. sb.insert(0,quot;Hello quot;); System.out.println(sb);

  2. sb.append(0,quot;Hello quot;); System.out.println(sb);

  3. sb.add(0,quot;Hello quot;); System.out.println(sb);

  4. sb.set(0,quot;Hello quot;); System.out.println(sb);D

Answer: A

Explanation: The java.lang.StringBuilder.insert(int offset, char c) method inserts the string

representation of the char argument into this sequence.

The second argument is inserted into the contents of this sequence at the position indicated by offset. The length of this sequence increases by one.The offset argument must be greater than or equal to 0, and less than or equal to the length of this sequence.

Reference: Java.lang.StringBuilder.insert() Method

Question No: 20

Which three are bad practices?

  1. Checking for ArrayIndexoutofBoundsException when iterating through an array to determine when all elements have been visited

  2. Checking for Error and. If necessary, restarting the programto ensure that users are unaware problems

  3. Checking for FileNotFoundException to inform a user that a filename entered is not valid

  4. Checking for ArrayIndexoutofBoundsException and ensuring that the program can recover if one occur

  5. Checking for anIOException and ensuring that the program can recover if one occurs

Answer: A,B,D

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