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QUESTION 33
Given the code fragment:
int[] array = {I, 2, 3, 4, 5};
And given the requirements:
1. Process all the elements of the array in the order of entry.
2. Process all the elements of the array in the reverse order of entry.
3. Process alternating elements of the array in the order of entry.
Which two statements are true?
A. Requirements 1, 2, and 3 can be implemented by using the enhanced for loop.
B. Requirements 1, 2, and 3 can be implemented by using the standard for loop.
C. Requirements 2 and 3 CANNOT be implemented by using the standard for loop.
D. Requirement 1 can be implemented by using the enhanced for loop.
E. Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop.
Answer: DE
QUESTION 34
Given:
What is the result?
A. 400 200
B. 200 200
C. 400 400
D. Compilation fails.
Answer: A
QUESTION 35
Given the following class declarations:
– public abstract class Animal
– public interface Hunter
– public class Cat extends Animal implements Hunter
– public class Tiger extends Cat
Which answer fails to compile?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Answer: D
Explanation:
Cat cannot be converted to Tiger.
One Tiger is a Cat but one Cat isn’t a Tiger.
QUESTION 36
Which statement is true about Java byte code?
A. It can run on any platform.
B. It can run on any platform only if it was compiled for that platform.
C. It can run on any platform that has the Java Runtime Environment.
D. It can run on any platform that has a Java compiler.
E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.
Answer: C
Explanation:
We are talking about byte code so the Java program has been compiled.
The question ask for what we need to run the byte code.
https://www.java.com/en/download/faq/whatis_java.xml
http://www.researchgate.net/post/Run_Java_Application_Without_Installing_Java_Runtime
QUESTION 37
Given:
How many MarkList instances are created in memory at runtime?
A. 1
B. 2
C. 3
D. 4
Answer: A
Explanation:
Only the statement “MarList obj1 = new MarkList();” creates an instance of MarkList.
QUESTION 38
Given:
What is the result?
A. Area is 6.0
B. Area is 3.0
C. Compilation fails at line n1
D. Compilation fails at line n2.
Answer: D
QUESTION 39
Given the code fragment:
Which three code fragments can be independently inserted at line nl to enable the code to print one?
A. Byte x = 1;
B. short x = 1;
C. String x = “1”;
D. Long x = 1;
E. Double x = 1;
F. Integer x = new Integer (“1”);
Answer: ABF
QUESTION 40
Given:
What is the result?
A. True false
B. True null
C. Compilation fails
D. A NullPointerException is thrown at runtime
Answer: A
Explanation:
With the statement “bool[1] = new Boolean(null);” we are creating a wrapped Boolean object with value null.
Java evaluates it to false since it cannot evaluate to true.
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