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Oracle Java Programming Certification Questions and Answers (Dumps and Practice Questions)



Question : Which three statements are benefits of encapsulation?
A. Allows a class implementation to change without changing t he clients
B. Protects confidential data from leaking out of the objects
C. Prevents code from causing exceptions
D. Enables the class implementation to protect its invariants
E. Permits classes to be combined into the same package
F. Enables multiple instances of the same class to be created safely
: Which three statements are benefits of encapsulation?
1. A,B,C
2. B,C,D
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4. D,E,F

5. A,B,D


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Question : Which statement will empty the contents of a StringBuilder variable named sb?

: Which statement will empty the contents of a StringBuilder variable named sb?
1. sb.deleteAll();
2. sb.delete(0, sb.size());
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4. sb.removeAll();



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Question : Given the code fragment:
System.out.println(2 + 4 * 9 - 3); //Line 21
System.out.println((2 + 4) * 9 - 3); // Line 22
System.out.println(2 + (4 * 9) - 3); // Line 23
System.out.println(2 + 4 * (9 - 3)); // Line 24
System.out.println((2 + 4 * 9) - 3); // Line 25
Which line of codes prints the highest number?
: Given the code fragment:
1. Line 21
2. Line 22
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4. Line 24

4. Line 25




Correct Answer : Get Lastest Questions and Answer : The following is printed: 35
35
35


Related Questions

Question : You have been given following code

public class Testoperator {
public static void main(String[] args) {
int result = 30 - 12 / (2 * 5) + 1;
System.out.print("Result = " + result);
}
}

What is the result?


 : You have been given following code
1. Result = 2
2. Result = 3
3. Result = 28
4. Result = 29
4. Result = 30





Question : Which three are bad practices?

A. Checking for ArrayIndexoutofBoundsException when iterating through an array to determine when all elements have been visited
B. Checking for Error and. If necessary, restarting the program to ensure that users are unaware problems
C. Checking for FileNotFoundException to inform a user that a filename entered is not valid
D. Checking for ArrayIndexoutofBoundsException and ensuring that the program can recover if one occur
E. Checking for an IoException and ensuring that the program can recover if one occurs

 : Which three are bad practices?
1. A,B,C
2. B,C,D
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4. A,B,D
5. B,C,D




Question : You have been given following code fragment

String[] cartoons = { "tom", "jerry", "micky", "tom" };
int counter = 0;
if ("tom".equals(cartoons[0])) {
counter++;
} else if ("tom".equals(cartoons[1])) {
counter++;
} else if ("tom".equals(cartoons[2])) {
counter++;
} else if ("tom".equals(cartoons[3])) {
counter++;
}
System.out.print(counter);

What would be printed , when executed ?
 : You have been given following code fragment
1. 1
2. 2
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4. 0





Question : Which statement is true about the default constructor of a top-level class?

 : Which statement is true about the default constructor of a top-level class?
1. It can take arguments.
2. It has private access modifier in its declaration.
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4. The default constructor of a subclass always invokes the no-argument constructor of its superclass.




Question : You have been given below code

List colors = new ArrayList();
colors.add("green");
colors.add("red");
colors.add("blue");
colors.add("yellow");
colors.remove(2);
colors.add(3, "cyan");
System.out.print(colors);


 : You have been given below code
1. [green, red, yellow, cyan]
2. [green, blue, yellow, cyan]
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4. An IndexoutofBoundsException is thrown at runtime






Question : The catch clause argument is always of type .

A. Exception
B. Exception but NoT including RuntimeException
C. Throwable
D. RuntimeException
E. CheckedException


 : The catch clause argument is always of type .
1. A
2. B
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4. D
5. E