Course 202020 Spring 2020 CSIS 212-B01 LUO
Test Final Exam
Started 3/6/20 7:51 PM Submitted 3/6/20 8:45 PM Due Date 3/6/20 11:59
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Status Completed
Attempt Score 144 out of 150 points Time Elapsed 53 minutes out of 2 hours
Instructions covers Modules/Weeks 5–8 open-book, open-notes
2-hour time limit
50 questions - Multiple Choice and True/False
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Submitted Answers, Feedback
● Question 1
3 out of 3 points
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 .
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
Which of the following statements is false?
3 out of 3 points
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
A programmer must do the following before using an array:
3 out of 3 points
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.
● Question 11
In Java, multidimensional arrays .
3 out of 3 points
Selected Answer:
All of the above [Show Less]