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2021 Mar 1Z0-803 testing engine
Q21. An unchecked exception occurs in a method dosomething() Should other code be added in the dosomething() method for it to compile and execute?
A. The Exception must be caught
B. The Exception must be declared to be thrown.
C. The Exception must be caught or declared to be thrown.
D. No other code needs to be added.
Answer: D
Q22. Given:
What is the result?
A. The program prints nothing
B. d
C. A S StringIndexOutOfBoundsException is thrown at runtime.
D. AnArrayIndexOutOfBoundsException is thrown at runtime.
E. A NullPointerException is thrown at runtime.
Answer: C
Q23. Given the code fragment:
A. Super Sub Sub
B. Contract Contract Super
C. Compilation fails at line n1
D. Compilation fails at line n2
Answer: D
Q24. which three lines are illegal?
A. line 3
B. line 4
C. line 5
D. line 6
E. line 10
F. line 11
G. line 12
H. line 13
Answer: CDH
Q25. Given the fragment:
A. 14
B. 15
C. 24
D. 25
E. 34
F. 35
Answer: F
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Q26. Given:
What code should be inserted?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
F. Option F
Answer: C
Q27. A method doSomething () that has no exception handling code is modified to trail a method that throws a checked exception. Which two modifications, made independently, will allow the program to compile?
A. Catch the exception in the method doSomething().
B. Declare the exception to be thrown in the doSomething() method signature.
C. Cast the exception to a RunTimeException in the doSomething() method.
D. Catch the exception in the method that calls doSomething().
Answer: AB
Q28. Which is a valid abstract class?
A. public abstract class Car {
protected void accelerate();
}
B. public interface Car {
protected abstract void accelerate();
}
C. public abstract class Car {
protected final void accelerate();
}
D. public abstract class Car {
protected abstract void accelerate();
}
E. public abstract class Car {
protected abstract void accelerate() {
//more car can do
}}
Answer: D
Q29. Give:
What is the result?
A. 1525
B. 13
C. Compilation fails
D. An exception is thrown at runtime
E. The program fails to execute due to runtime error
Answer: D
Q30. Which two statements are true for a two-dimensional array?
A. It is implemented as an array of the specified element type.
B. Using a row by column convention, each row of a two-dimensional array must be of the same size.
C. At declaration time, the number of elements of the array in each dimension must be specified.
D. All methods of the class Object may be invoked on the two-dimensional array.
Answer: AD