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Oracle 1Z0-851 Online Practice Questions and Exam Preparation

1Z0-851 Exam Details

  • Exam Code
    :1Z0-851
  • Exam Name
    :Oracle Solaris 11 System Administration
  • Certification
    :Oracle Certifications
  • Vendor
    :Oracle
  • Total Questions
    :290 Q&As
  • Last Updated
    :Dec 10, 2021

Oracle 1Z0-851 Online Questions & Answers

  • Question 171:

    Given:

    11.

    class Converter {

    12.

    public static void main(String[] args) {

    13.

    Integer i = args[0];

    14.

    int j = 12;

    15.

    System.out.println("It is " + (j==i) + " that j==i.");

    16.

    }

    17.

    }

    What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?

    A. It is true that j==i.
    B. It is false that j==i.
    C. An exception is thrown at runtime.
    D. Compilation fails because of an error in line 13.

  • Question 172:

    Click the Exhibit button. What is the output if the main() method is run?

    A. 4
    B. 5
    C. 8
    D. 9
    E. Compilation fails.
    F. An exception is thrown at runtime.
    G. It is impossible to determine for certain.

  • Question 173:

    Which two code fragments correctly create and initialize a static array of int elements? (Choose two.)

    A. static final int[] a = { 100,200 };
    B. static final int[] a; static { a=new int[2]; a[0]=100; a[1]=200; }
    C. static final int[] a = new int[2]{ 100,200 };
    D. static final int[] a; static void init() { a = new int[3]; a[0]=100; a[1]=200; }

  • Question 174:

    Given:

    12.

    import java.util.*;

    13.

    public class Explorer3 {

    14.

    public static void main(String[] args) {

    15.

    TreeSet s = new TreeSet();

    16.

    TreeSet subs = new TreeSet();

    17.

    for(int i = 606; i < 613; i++)

    18.

    if(i%2 == 0) s.add(i);

    19.

    subs = (TreeSet)s.subSet(608, true, 611, true);

    20.

    subs.add(629);

    21.

    System.out.println(s + " " + subs);

    22.

    }

    23.

    }

    What is the result?

    A. Compilation fails.
    B. An exception is thrown at runtime.
    C. [608, 610, 612, 629] [608, 610]
    D. [608, 610, 612, 629] [608, 610, 629]
    E. [606, 608, 610, 612, 629] [608, 610]
    F. [606, 608, 610, 612, 629] [608, 610, 629]

  • Question 175:

    A company has a business application that provides its users with many different reports:

    receivables reports, payables reports, revenue projects, and so on. The company has just purchased some new, state-of-the-art, wireless printers, and a programmer has been assigned the task of enhancing all of the reports to use not only

    the company's old printers, but the new wireless printers as well. When the programmer starts looking into the application, the programmer discovers that because of the design of the application, it is necessary to make changes to each

    report to support the new printers.

    Which two design concepts most likely explain this situation? (Choose two.)

    A. Inheritance
    B. Low cohesion
    C. Tight coupling
    D. High cohesion
    E. Loose coupling
    F. Object immutability

  • Question 176:

    Given:

    1.

    import java.util.*;

    2.

    public class WrappedString {

    3.

    private String s;

    4.

    public WrappedString(String s) { this.s = s; }

    5.

    public static void main(String[] args) {

    6.

    HashSet hs = new HashSet();

    7.

    WrappedString ws1 = new WrappedString("aardvark");

    8.

    WrappedString ws2 = new WrappedString("aardvark");

    9.

    String s1 = new String("aardvark");

    10.

    String s2 = new String("aardvark");

    11.

    hs.add(ws1); hs.add(ws2); hs.add(s1); hs.add(s2);

    12.

    System.out.println(hs.size()); } }

    What is the result?

    B. 1
    C. 2
    D. 3
    E. 4
    F. Compilation fails.
    G. An exception is thrown at runtime.

  • Question 177:

    Given:

    10.

    class Line {

    11.

    public static class Point {}

    12.

    }

    13.

    14.

    class Triangle {

    15.

    // insert code here

    16.

    }

    Which code, inserted at line 15, creates an instance of the Point class defined in Line?

    A. Point p = new Point();
    B. Line.Point p = new Line.Point();
    C. The Point class cannot be instatiated at line 15.
    D. Line l = new Line() ; l.Point p = new l.Point();

  • Question 178:

    Given: public class NamedCounter {

    private final String name;

    private int count;

    public NamedCounter(String name) { this.name = name; } public String getName() { return name; } public void increment() { count++; } public int getCount() { return count; } public void reset() { count = 0; } }

    Which three changes should be made to adapt this class to be used safely by multiple threads? (Choose three.)

    A. declare reset() using the synchronized keyword
    B. declare getName() using the synchronized keyword
    C. declare getCount() using the synchronized keyword
    D. declare the constructor using the synchronized keyword
    E. declare increment() using the synchronized keyword

  • Question 179:

    Given:

    11.

    // insert code here

    12.

    private N min, max;

    13.

    public N getMin() { return min; }

    14.

    public N getMax() { return max; }

    15.

    public void add(N added) {

    16.

    if (min == null || added.doubleValue() < min.doubleValue())

    17.

    min = added;

    18.

    if (max == null || added.doubleValue() > max.doubleValue()) 19. max = added;

    20.

    }

    21.

    }

    Which two, inserted at line 11, will allow the code to compile? (Choose two.)

    A. public class MinMax {
    B. public class MinMax
    C. public class MinMax {
    D. public class MinMax {
    E. public class MinMax
    F. public class MinMax {

  • Question 180:

    Given:

    1.

    public class TestOne {

    2.

    public static void main (String[] args) throws Exception {

    3.

    Thread.sleep(3000);

    4.

    System.out.println("sleep");

    5.

    }

    6.

    }

    What is the result?

    A. Compilation fails.
    B. An exception is thrown at runtime.
    C. The code executes normally and prints "sleep".
    D. The code executes normally, but nothing is printed.

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