Java Mock Test 3

Java Mock Test 3

Java Mock Test 3, 10 QUESTIONS

published on June 28, 200916 responses 1
Java Mock Test 3
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1/10

What will be displayed after you try to compile and execute the following code?
------
int i = 10;
if(i) {
System.out.println("A");
} else {
System.out.println("B");
}

A
B
Compilation Error
Nothing will be displayed
2/10

How do you write an infinite loop?

for(;;) {

}
while (true) {

}
do {

} while (true);
3/10

Which of the following variables are defined correctly?

Hint: 3 choices
String $;
String _;
String 12x;
String x12;
String s#;
String h@ppy;
String myString#2;
4/10

How many primitive data types are in Java?

5
6
7
8
9
10
12
5/10

Which will be the value of variable y after you compile and execute the following block of code?
------
public class MyClass {

private int x =10;

public static void main(String[] args) {

int y = x++%5;
}

0
2
Compilation Error
Runtime Error
6/10

What will be displayed after you try to compile and execute the following code?
------
public static void main(String[] args) {
final String s = "A";
s.concat("B");
System.out.println(s);
}

Compilation Error
Runtime Error
A
AB
B
7/10

How many Constructors has the Character object?

1
2
3
4
8/10

Which of the following statements are true about Math.random() function

It generates an int value bigger or equal to 1 and less than 10.
It generates an int value bigger or equal to 1 and less than 100
It generates a float value bigger or equal to 0.0 and less than 1.0
None of these
9/10

What will be displayed after you try to compile and execute the following code?
------
double x = -34.45;

System.out.println(Math.floor(x));
System.out.println(Math.ceil(x));
System.out.println(Math.abs(x));

35.0
34.0
34.0
-34.0
-35.0
34.0
-35.0
-34.0
34.45
-34.0
-34.0
34.45
10/10

Is the String object immutable?

Yes
No
Depends on JRE version