Which statement below could be used to simulate the outputs of tossing a quarter to
get heads or tails? Suppose randomNumbers is a SecureRandom object.
Selected
Answer:
randomNumbers.nextInt(2);
Question 2
3 out
...
Which statement below could be used to simulate the outputs of tossing a quarter to
get heads or tails? Suppose randomNumbers is a SecureRandom object.
Selected
Answer:
randomNumbers.nextInt(2);
Question 2
3 out of 3 points
Overloaded methods always have the same _________.
Selected
Answer:
method name
Question 3
3 out of 3 points
The identifiers in an enumeration ________.
Selected
Answer:
must be unique.
Question 4
3 out of 3 points
Declaring main as static allows the JVM to invoke main ________.
Selected
Answer:
without creating an instance of the class in which main is declared.
Question 5
3 out of 3 points
Variables should be declared as fields only if ________.
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Selected
Answer:
they are required for use in more than one method or their values must be
saved between calls to the class’s methods
Question 6
3 out of 3 points
The java.text package contains classes for manipulating all of the following items
except ________.
Selected
Answer:
classes
Question 7
3 out of 3 points
Which set of statements totals the items in each row of two-dimensional array items, and
displays each row’s total?
Selected
Answer: for (int row = 0; row < items.length; row++) {
int total = 0;
for (int column = 0; column < items[row].length;
column++) {
total += items[row][column];
System.out.printf("Row %d's total is %d%n", row,
total);
}
Question 8
3 out of 3 points
Which of the following statements is false?
Selected
Answer:
When an argument is passed by reference, the called method can
access the argument’s value in the caller directly but cannot modify it.
Question 9
3 out of 3 points
A programmer must do the following before using an array:
Selected
Answer:
declare then create the array.
Question 10
0 out of 3 points
How many Book objects are created by the following statement?
Book[] books = new Book[10];
Selected
Answer:
None of the above
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