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2021 Mar 1Z0-803 test
Q81. Which three are bad practices?
A. Checking for ArrayIndexoutofBoundsException when iterating through an array to determine when all elements have been visited
B. Checking for Error and. If necessary, restarting the program to ensure that users are unaware problems
C. Checking for FileNotFoundException to inform a user that a filename entered is not valid
D. Checking for ArrayIndexoutofBoundsException and ensuring that the program can recover if one occur
E. Checking for an IOException and ensuring that the program can recover if one occurs
Answer: ABD
Q82. Which code fragment, when inserted at line 9, enables the code to print true?
A. String str2 = str1;
B. String str2 = new string (str1);
C. String str2 = sb1.toString();
D. String str2 = “Duke”;
Answer: B
Q83. Given:
What is true about the class Wow?
A. It compiles without error.
B. It does not compile because an abstract class cannot have private methods.
C. It does not compile because an abstract class cannot have instance variables.
D. It does not compile because an abstract class must have at least one abstract method.
E. It does not compile because an abstract class must have a constructor with no arguments.
Answer: A
Q84. Given:
What is the result?
A. hEllOjAvA!
B. Hello java!
C. Out of limits hEllOjAvA!
D. Out of limits
Answer: D
Q85. Given:
Which three lines will compile and output “right on!”?
A. Line 5
B. Line 6
C. Line 7
D. Line 8
E. Line 9
F. Line 10
Answer: CDF
Down to date 1Z0-803 free exam:
Q86. Given:
What three modifications are necessary to ensure that the class is being properly encapsulated?
This class is poorly encapsulated. You need to change the circle class to compute and return the area instead.
A. Change the access modifier of the setradius () method to private
B. Change the getArea () method public double getArea () { return area; }
C. When the radius is set in the Circle constructor and the setRadius () method, recomputed the area and store it into the area field
D. Change the getRadius () method:
public double getRadius () {
area = Math.PI * radius * radius;
return radius;
}
Answer: BCD
Q87. Given the code fragment:
What is the result?
A. 10 8 6 4 2 0
B. 10 8 6 4 2
C. An Arithmetic Exception is thrown at runtime
D. The program goes into an infinite loop outputting: 10 8 6 4 2 0. . .
E. Compilation fails
Answer: B
Q88. What is the result if the integer aVar is 9?
A. 10 Hello world!
B. 10 Hello universe!
C. 9 Hello world!
D. Compilation fails.
Answer: C
Q89. public class MyFor {
public static void main(String[] args) {
for (int ii = 0; ii < 4; ii++) {
System.out.println("ii = "+ ii);
ii = ii +1;
}
}
}
What is the result?
A. ii = 0
ii = 2
B. ii = 0
ii = 1
ii = 2
ii = 3
C. ii =
D. Compilation fails.
Answer: A
Q90. Given:
What is the reference type of myZ and what is the type of the object it references?
A. Reference type is Z; object type is Z.
B. Reference type is Y; object type is Y.
C. Reference type is Z; object type is Y.
D. Reference type is X; object type is Z.
Answer: C
