[Full-Version] 2023 New Preparation Guide of Oracle 1z0-808 Exam [Q113-Q128]

[Full-Version] 2023 New Preparation Guide of Oracle 1z0-808 Exam

1z0-808 Practice Exam – 225 Unique Questions

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QUESTION 113
Given the code fragment:

What is the result?

 true true

 true false

 false false

 false true

QUESTION 114
You are writing a method that is declared not to return a value. Which two are permitted in the method body?

 omission of the return statement

 return null;

 return void;

 return;

Any method declared void doesn’t return a value. It does not need to contain a return
statement, but it may do so. In such a case, a return statement can be used to branch out
of a control flow block and exit the method and is simply used like this:
return;

QUESTION 115
Given:

What is the result?

 True false

 True null

 Compilation fails

 A NullPointerException is thrown at runtime

QUESTION 116
The protected modifier on a Field declaration within a public class means that the field ______________.

 Can be read and written from this class and its subclasses defined in any package

 Can be read but not written from outside the class

 Cannot be modified

 Can be read and written from this class and its subclasses only within the same package

QUESTION 117
Given:

What is the result?

 100 0 : 100 200:

 100 0 : 100 0 :

 100 200 : 100 200 :

 100 200 : 100 0 :

QUESTION 118
Which two statements are true? (Choose two.)

 Error class is unextendable.

 Error class is extendable.

 Error is a RuntimeException.

 Error is an Exception.

 Error is a Throwable.

QUESTION 119
Given the following code for the classes MyException and Test:

What is the result?

 A

 B

 Either A or B

 A B

 A compile time error occurs at line n1

QUESTION 120
Given the code fragment:

What is the result?

 Compilation fails at both line n1 and line n2.

 Compilation fails only at line n2.

 Compilation fails only at line n1.

 Jesse 25
Walter 52

QUESTION 121
Given the code fragment:
public class Test {
static String[][] arr =new String[3][];
private static void doPrint() {
//insert code here
}
public static void main(String[] args) {
String[] class1 = {“A”,”B”,”C”};
String[] class2 = {“L”,”M”,”N”,”O”};
String[] class3 = {“I”,”J”};
arr[0] = class1;
arr[1] = class2;
arr[2] = class3;
Test.doPrint();
}
}
Which code fragment, when inserted at line //insert code here, enables the code to print
COJ?

 int i = 0;
for (String[] sub: arr) {
int j = sub.length -1;
for (String str: sub) {
System.out.println(str[j]);
i++;
}
}

 private static void doPrint() {
for (int i = 0;i < arr.length;i++) {
int j = arr[i].length-1;
System.out.print(arr[i][j]);
}
}

 int i = 0;
for (String[] sub: arr[][]) {
int j = sub.length;
System.out.print(arr[i][j]);
i++;
}

 for (int i = 0;i < arr.length-1;i++) {
int j = arr[i].length-1;
System.out.print(arr[i][j]);
i++;
}

Incorrect:
not A: The following line causes a compile error:
System.out.println(str[j]);
Not C: Compile erro line:
for (String[] sub: arr[][])
not D: Output: C

QUESTION 122
Given:

What is the result?

 myStr: 9009, myNum: 9009

 myStr: 7007, myNum: 7007

 myStr: 7007, myNum: 9009

 Compilation fails

QUESTION 123
Given:
class Mid {
public int findMid(int n1, int n2) {
return (n1 + n2) / 2;
}
}
public class Calc extends Mid {
public static void main(String[] args) {
int n1 = 22, n2 = 2;
// insert code here
System.out.print(n3);
}
}
Which two code fragments, when inserted at // insert code here, enable the code to compile and print 12?

 Calc c = new Calc(); int n3 = c.findMid(n1,n2);

 int n3 = super.findMid(n1,n3);

 Calc c = new Mid(); int n3 = c.findMid(n1, n2);

 Mid m1 = new Calc(); int n3 = m1.findMid(n1, n2);

 int n3 = Calc.findMid(n1, n2);

Incorrect:
Not B: circular definition of n3.
Not C: Compilation error. line Calc c = new Mid();
required: Calc
found: Mid
Not E: Compilation error. line int n3 = Calc.findMid(n1, n2);
non-static method findMid(int,int) cannot be referenced from a static context

QUESTION 124
Given the code fragment:

Which two modifications should you make so that the code compiles successfully? (Choose two.)

 Option A

 Option B

 Option C

 Option D

 Option E

QUESTION 125
Which statement is/are true?
I. Default constructor only contains “super();” call.
II. We can’t use any access modifier with a constructor.
III. A constructor should not have a return type.

 Only I.

 Only II.

 Only I and II.

 Only I and III.

 AIL

Statement I is correct as the default constructor only contains super0 call
Statement II is incorrect as we can use any access modifier with a constructor.
Statement III is correct as constructor can’t have return type, even void.
So option D is correct.
httpsy/docs.oracle.com/javase/tutorial/iava/javaOO/construaors.html

QUESTION 126
Given:

What is the result?

 Option A

 Option B

 Option C

 Option D

QUESTION 127
Given:

And given the commands:
javac Test.java
java Test TRUE null
What is the result?

 TRUE null

 true false

 false false

 true true

 AClassCastExceptionis thrown at runtime.

QUESTION 128
Given:

What is the result?
Compilation fails at line n3 and line n4.

 Compilation fails at line n1 and line n2.

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