Assuming that the user inputs “Joe” at the prompt, what is the output of the fol
ID: 3668109 • Letter: A
Question
Assuming that the user inputs “Joe” at the prompt, what is the output of the following code snippet?
A.Joe, Good morning
Joe
C., Good morning
D.The code snippet does not compile because the += operator cannot be used in this context.
2.
Which of the following statements with comments is(are) valid?
I. int cnt = 0; /* Set count to 0
II. int cnt = 0; /* Set count to 0 */
III. int cnt = 0; // Set count to 0
II and III are valid
Only I is valid
Only III is valid
I and II are valid
2.What does the following statement sequence print?
A.Java is powerful
B.Java + is powerful
C.is powerful
D.Nothing; compile-time error
3.
What will be the value inside the variables x and y after the given set of assignments?
x = 20, y = 20
x = 10, y = 20
x = 20, y = 10
x = 40, y = 20
4.
Which one of the following statements displays the output as +00321.00?
A.System.out.printf("%09.00f", 321.0);
B.System.out.printf("+%09.2f", 321.0);
C.System.out.printf("%009,2f", 321.0);
D.System.out.printf("+9.2f", 321.0);
5.
What is the output of the following code snippet?
First: William
Last:
A.First: William
B.Last: lastname
C.Unpredictable output
D.Code will not compile
^.
What is wrong with the following code snippet?
A.The code snippet uses a variable that has not yet been initialized.
B.The code snippet attempts to assign a decimal value to an integer variable.
C.The code snippet attempts to assign an integer value to a decimal variable.
D.The code snippet uses a variable that has not been declared.
7.
What does the following statement sequence print?
A.Compile-time error
B.is powerful
C.Java is powerful
D.Java + is powerful
7.
What is the output of the following code snippet?
A.337.0
B.7.0
C.19.0
D.25.0
8.
Suppose that you time a program as a function of N and produce the following table.
N seconds
-------------------
2048 0.000
4096 0.001
8192 0.004
16384 0.014
32768 0.051
65536 0.194
131072 0.741
262144 2.821
524288 10.719
1048576 40.915
2097152 155.502
4194304 591.610
8388608 2251.992
Estimate the order of growth of the running time as a function of N. Assume that the running time obeys a power law T(N) ~ a N^b. For your answer, enter the constant b. Your answer will be marked as correct if it is within 1% of the target answer - using two digits after the decimal separator, e.g., 2.34.
9.What is the order of growth of the worst case running time of the following code fragment as a function of N?
int sum = 0;
for (int i = 0; i < N; i++)
for (int j = 0; j < i; j++)
for (int k = 0; k < j; k++)
sum++;
A.N^3
B.N
C.N^2
D.NlgN
A.Joe, Good morning
B.Joe
C., Good morning
D.The code snippet does not compile because the += operator cannot be used in this context.
Explanation / Answer
1. A.Joe, Good morning
2. II and III are valid
2. D.Nothing; compile-time error
3. x = 10, y = 20 (if we print x and y after the calcutaion the values would be x=5 and y= 5)
4. System.out.printf("+%09.2f", 321.0);
5. Code will not compile
6. The code snippet uses a variable that has not been declared.
7. Nothing; compile-time error
7. option B (7.0)
8.