21. You wish to store a small amount of data and make it available for rapid access. You do not have a need for the data to be sorted, uniqueness is not an issue and the data will remain fairly static Which data structure might be most suitable for this requirement?
Answer: an array
Explanation:Here is no explanation for this answer
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22. class Test {
public static void main(String[ ] args) {
try {
String s = "5.6";
Integer.parseInt(s); // Cause a NumberFormatException
int i = 0;
int y = 2 / i;
System.out.println("Welcome to Java");
} catch (Exception ex) {
System.out.println(ex);
}
}
}
Answer: NumberFormatException
Explanation:Here is no explanation for this answer
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23. What will be the output of the program?
public class TestDogs
{
public static void main(String [] args)
{
Dog [][] theDogs = new Dog[3][];
System.out.println(theDogs[2][0].toString());
}
}
class Dog { }
Answer: An exception is thrown at runtime
Explanation:Here is no explanation for this answer
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24. Which declaration of the main method below would allow a class to be started as a standalone program. Select the one correct answer.
Answer: public static void main(String args[])
Explanation:Here is no explanation for this answer
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25. If we do
ArrayList lst = new ArrayList();
What is the initial capacity of the ArrayList lst ?
Answer: 10
Explanation:Here is no explanation for this answer
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26. "Software engineers should not use their technical skills to misuse other people's computers."Here the term misuse refers to:
Answer: All of the mentioned
Explanation:Here is no explanation for this answer
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27. Explain what is meant by PRODUCT with reference to one of the eight principles as per the ACM/IEEE Code of Ethics ?
Answer: Software engineers shall ensure that their products and related modifications meet the highest professional standards possible.
Explanation:Here is no explanation for this answer
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28. An sequence diagram is:
Answer: A time-line illustrating a typical sequence of calls between object function members
Explanation:Here is no explanation for this answer
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29. Which of these classes implement the Collection interface SortedMap. Select the one correct answers.
Answer: TreeMap
Explanation:Here is no explanation for this answer
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30. Which of these are core interfaces in the collection framework. Select the one correct answer.
Answer: Map
Explanation:Here is no explanation for this answer
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