Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Answer 10 to 12
Transcribed Image Text:11. What is y after the following statement is executed?
x = -1;
y = (x < 0) ? -2 : 3;
а.
-3
b.
-2
с.
3
d.
e. Illegal expression
12. What is the output of the following code?
boolean even = false;
System.out.println((even ? "true" : "false"));
a. true
b. false
c. nothing
d. true false
13. What is Math.floor(3.6)?
а.
3.0
b.
3
с.
4
d.
5.0
14. Which of the following assignment statements is correct?
char c = 'dn';
char c = 100;
char c = 'm';
a.
b.
с.
d.
char c = "100";
15. Which of the following are valid identifiers?
a.
$failure
b.
public
с.
988ht
d.
8=9
е.
radius
![7. To obtain the are sine of 0.5 degree, use
Math.asin(0.5)
Math.asin(Math.toDegrees(0.5))
Math.asin(Math.toRadians(0.5))
Math.sin(0.5)
a.
b.
с.
d.
8. What is the value of the following expression?
true || true && false
true
false
а.
b.
9. What is y displayed in the following code?
public class Testl {
public static void main(String[] args) {
int x = 1;
int y = x = x + 1;
System.out.println("y is " + y);
}
}
a. y is 0.
b. y is 1 because x is assigned to y first.
c. y is 2 because x + 1 is assigned to x and then x is assigned to y.
d. The program has a compile error since x is redeclared in the statement int y = x = x +1
10. Analyze the following program fragment:
int x;
double d = 1.5;
switch (d) {
case 1.0: x = 1;
case 1.5: x = 2;
case 2.0: x = 3;
Which of these is correct about the above code?
The program has a compile error because the required break statement is missing
in the switch statement.
The program has a compile error because the required default case is missing in
the switch statement.
a.
b.
с.
The switch control variable cannot be double.
d.
No errors.](https://content.bartleby.com/qna-images/question/d070c601-43cf-4c7f-b3ee-07dbe2660b26/a24f75d0-22cf-4dae-82cd-25376fce6e6f/y8ibvze_processed.png)
Transcribed Image Text:7. To obtain the are sine of 0.5 degree, use
Math.asin(0.5)
Math.asin(Math.toDegrees(0.5))
Math.asin(Math.toRadians(0.5))
Math.sin(0.5)
a.
b.
с.
d.
8. What is the value of the following expression?
true || true && false
true
false
а.
b.
9. What is y displayed in the following code?
public class Testl {
public static void main(String[] args) {
int x = 1;
int y = x = x + 1;
System.out.println("y is " + y);
}
}
a. y is 0.
b. y is 1 because x is assigned to y first.
c. y is 2 because x + 1 is assigned to x and then x is assigned to y.
d. The program has a compile error since x is redeclared in the statement int y = x = x +1
10. Analyze the following program fragment:
int x;
double d = 1.5;
switch (d) {
case 1.0: x = 1;
case 1.5: x = 2;
case 2.0: x = 3;
Which of these is correct about the above code?
The program has a compile error because the required break statement is missing
in the switch statement.
The program has a compile error because the required default case is missing in
the switch statement.
a.
b.
с.
The switch control variable cannot be double.
d.
No errors.
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