Question: Which line of code will set the String s to the value happy? Question 1 options: s
Which line of code will set the String s to the value "happy"?
Question 1 options:
| s <- "happy"; | |
| set s to "happy"; | |
| "happy" = s; | |
| s = "happy"; |
Question 2 (1 point)
What is the value of the expression (2 + 3 + "fun")?
Question 2 options:
| 5 | |
| 23fun | |
| 5fun | |
| error |
Question 3 (1 point)
Java ints can only represent integers. Decimal values must be handled by a different type.
Question 3 options:
| True | |
| False |
Question 4 (1 point)
The second line of following code has an error. What change will fix it so the final value in x will be 199?
double b = 99.6; int x = b * 2.0;
Question 4 options:
| int x = (int)(b * 2.0); | |
| int x = b * 2; | |
| int x = (int)b * 2; | |
| double x = b * 2.0; |
Question 5 (1 point)
A Java int type can hold any integer.
Question 5 options:
| True | |
| False |
Question 6 (1 point)
What is the value of the following expressions in Java?
20 / 3
Your Answer:Question 6 options:
| Answer |
Question 7 (1 point)
What is the value of the following expression
4%3 + 1
Question 7 options:
| 2 | |
| 2.3333333333 | |
| 0 | |
| 1 |
Question 8 (1 point)
* has higher precedence than -
Question 8 options:
| True | |
| False |
Question 9 (1 point)
Which command can be used to compile a Java program saved in a file called MyProgram.java
Question 9 options:
| javac MyProgram.java | |
| javac MyProgram | |
| java MyProgram.java | |
| java MyProgram |
Question 10 (1 point)
A Java double can represent all real numbers between 0 and 1.
Question 10 options:
| True | |
| False |
Question 11 (1 point)
Java is case-sensitive.
Question 11 options:
| True | |
| False |
Question 12 (1 point)
What is the value of the expression of boolean variables a and b
a && b
given that a is true and b is false.
Question 12 options:
| True | |
| False |
Question 13 (1 point)
In the main method, how would you set an int called b to the value held in args[0]?
Question 13 options:
| int b = Integer.parseInt(args[0]); | |
| args[0] = b; | |
| int b = args[0]; | |
| int b = Scanner.nextInt(args[0]); |
Question 14 (1 point)
What is the value of the expression ("fun" + 2 + 3)?
Question 14 options:
| fun23 | |
| fun+2+3 | |
| fun5 | |
| fun 23 |
Question 15 (1 point)
What is the signature of the method that is the starting point of a Java program?
Question 15 options:
| public void main(String[] args) | |
| public static void start(String args) | |
| public static void main(String[] args) | |
| public static void main(String args) |
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