NEW QUESTION 1
Given:

Why will the code not compile?

• A. A static field cannot be private.
• B. The getLetter method has no body.
• C. There is no setLetter method.
• D. The letter field is uninitialized.
• E. It contains a method named Main instead of ma

Answer: B

Explanation: The getLetter() method needs a body public static int getLetter() { }; .

NEW QUESTION 2
Given:
public class ColorTest {
public static void main(String[] args) {
String[] colors = {"red", "blue","green","yellow","maroon","cyan"}; int count = 0;
for (String c : colors) { if (count >= 4) { break;
}
else { continue;
}
if (c.length() >= 4) { colors[count] = c.substring(0,3);
}
count++;
}
System.out.println(colors[count]);
}
}
What is the result?

• A. Yellow
• B. Maroon
• C. Compilation fails
• D. A StringIndexOutOfBoundsException is thrown at runtime.

Answer: C

Explanation: Theline, if (c.length() >= 4) {, is never reached. This causes a compilation error.
Note: The continue statement skips the current iteration of a for, while , or do-while loop. An unlabeled break statement terminates the innermost switch, for, while, or do- while statement, but a labeled break terminates an outer statement.

NEW QUESTION 3
Given the fragment:

What is the result?

• A. 13480.0
• B. 13480.02
• C. Compilation fails
• D. An exception is thrown at runtime

Answer: A

NEW QUESTION 4
Which two actions will improve the encapsulation of a class?

• A. Changing the access modifier of a field from public to private
• B. Removing the public modifier from a class declaration
• C. Changing the return type of a method to void
• D. Returning a copy of the contents of an array or ArrayList instead of a direct reference

Answer: AD

Explanation: Reference: http://www.tutorialspoint.com/java/java_access_modifiers.htm

NEW QUESTION 5
Given:
public class Test {
public static void main(String[] args) { int arr[] = new int[4];
arr[0] = 1;
arr[1] = 2;
arr[2] = 4;
arr[3] = 5;
int sum = 0; try {
for (int pos = 0; pos <= 4; pos++) { sum = sum +arr[pos];
}
} catch (Exception e) { System.out.println("Invalid index");
}
System.out.println(sum);
}
}
What is the result?

• A. 12
• B. Invalid Index 12
• C. Invalid Index
• D. Compilation fails

Answer: B

Explanation: The loop ( for (int pos = 0; pos <= 4; pos++) { ), it should be pos <= 3, causes an exception, which is caught. Then the correct sum is printed.

NEW QUESTION 6
Given:
abstract class A1 {
public abstract void m1();
public void m2() { System.out.println("Green"); }
}
abstract class A2 extends A1 { public abstract void m3();
public void m1() { System.out.println("Cyan"); } public void m2() { System.out.println("Blue"); }
}
public class A3 extends A2 {
public void m1() { System.out.println("Yellow"); } public void m2() { System.out.println("Pink"); } public void m3() { System.out.println("Red"); } public static void main(String[] args) {
A2 tp = new A3(); tp.m1();
tp.m2();
tp.m3();
}
}
What is the result?

• A. Yellow Pink Red
• B. Cyan Blue Red
• C. Cyan Green Red
• D. Compilation Fails

Answer: A

NEW QUESTION 7
Given the code fragment:

What is the result?

• A. Found Red Found Default
• B. Found Teal
• C. Found Red Found Blue Found Teal
• D. Found Red Found Blue Found Teal Found Default
• E. Found Default

Answer: B

NEW QUESTION 8
Given the class definitions:

And the code fragment of the main() method,

What is the result?

• A. Java Java Java
• B. Java Jeve va
• C. Java Jeve ve
• D. Compilation fails

Answer: D

NEW QUESTION 9
Which three statements are true about the structure of a Java class?

• A. A class can have only one private constructor.
• B. A method can have the same name as a field.
• C. A class can have overloaded static methods.
• D. A public class must have a main method.
• E. The methods are mandatory components of a class.
• F. The fields need not be initialized before use.

Answer: ABC

Explanation: A: Private constructors prevent a class from being explicitly instantiatedby its callers.
If the programmer does not provide a constructor for a class, then the system will always provide a default, public no-argument constructor. To disable this default constructor, simply add a private no-argument constructor to the class. This private constructor may be empty.
B: The following works fine: int cake() {
int cake=0; return (1);
}
C: We can overload static method in Java. In terms of method overloading static method are just like normal methods and in order to overload static method you need to provide another static method with same name but different method signature.
Incorrect:
Not D: Only a public class in an application need to have a main method. Not E:
Example:
class A
{
public string something; public int a;
}
Q: What do you call classes without methods? Most of the time: An anti pattern.
Why? Because it faciliates procedural programming with "Operator" classes and data structures. You separate data and behaviour which isn't exactly good OOP.
Often times: A DTO (Data Transfer Object)
Read only datastructures meant to exchange data, derived from a business/domain object. Sometimes: Just data structure.
Well sometimes, you just gotta have those structures to hold data that is just plain andsimple and has no operations on it.
Not F: Fields need to be initialtized. If not the code will not compile. Example:
Uncompilable source code - variable x might not have been initialized

NEW QUESTION 10
Given:

What code should be inserted?

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E
• F. Option F

Answer: C

Explanation: Dog should be an abstract class. The correct syntax for this is: abstract class Dog { Poodle should extend Dog (not implement).

NEW QUESTION 11
Given:

What is the result?

• A. hEllOjAvA!
• B. Hello java!
• C. Out of limits hEllOjAvA!
• D. Out of limits

Answer: C

NEW QUESTION 12
Given the code fragment:
class Student {
int rollnumber; String name;
List cources = new ArrayList();
// insert code here public String toString() {
return rollnumber + " : " + name + " : " + cources;
}
}
And,
public class Test {
public static void main(String[] args) { List cs = newArrayList(); cs.add("Java");
cs.add("C");
Student s = new Student(123,"Fred", cs); System.out.println(s);
}
}
Which code fragment, when inserted at line // insert code here, enables class Test to print 123 : Fred : [Java, C]?

• A. private Student(int i, String name, List cs) {/* initialization code goes here */}
• B. public void Student(int i, String name, List cs) {/* initialization code goes here */}
• C. Student(int i, String name, List cs) {/* initialization code goes here */}
• D. Student(int i, String name, ArrayList cs) {/* initialization code goes here */}

Answer: C

Explanation: Incorrect:
Not A: Student has private access line: Student s = new Student(123,"Fred", cs);
Not D: Cannot be applied to given types.Line: Student s = new Student(123,"Fred", cs);

NEW QUESTION 13
Given:

And the commands: Javac Jump.java
Java Jump crazy elephant is always What is the result?

• A. Lazy lion is jumping
• B. Lion is always jumping
• C. Crazy elephant is jumping
• D. Elephant is always jumping
• E. Compilation fails

Answer: D

NEW QUESTION 14
Given:

Which code fragment, when inserted at line 7, enables the code print true?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: A

NEW QUESTION 15
Given the code fragment:

Which code fragment, when inserted at // insert code here, enables the code to compile and and print a b c?

• A. List update (String[] strs)
• B. Static ArrayListupdate(String [] strs)
• C. Static List update (String [] strs)
• D. Static void update (String[] strs)
• E. ArrayList static update(String [] strs)

Answer: E

NEW QUESTION 16
Given:
public class Main {
public static void main(String[] args) { try {
doSomething();
}
catch (SpecialException e) { System.out.println(e);
}}
static void doSomething() { int [] ages = new int[4]; ages[4] = 17; doSomethingElse();
}
static void doSomethingElse() {
throw new SpecialException("Thrown at end of doSomething() method"); }
}
What is the output?

• A. SpecialException: Thrown at end of doSomething() method
• B. Error in thread "main" java.lan
• C. ArrayIndexOutOfBoundseror
• D. Exception inthread "main" java.lang.ArrayIndexOutOfBoundsException: 4 at Main.doSomething(Main.java:12)at Main.main(Main.java:4)
• E. SpecialException: Thrown at end of doSomething() method at Main.doSomethingElse(Main.java:16)at Main.doSomething(Main.java:13) at Main.main(Main.java:4)

Answer: C

Explanation: The following line causes a runtime exception (as the index is out of bounds): ages[4] = 17;
A runtime exception is thrown as anArrayIndexOutOfBoundsException.
Note: The third kind of exception (compared to checked exceptions and errors) is the runtime exception. These are exceptional conditions that are internal to the application, and
that the application usually cannot anticipate or recover from. These usually indicate programming bugs, such as logic errorsor improper use of an API.
Runtime exceptionsare not subjectto the Catch or Specify Requirement. Runtime exceptions are those indicated byRuntimeExceptionand its subclasses.

NEW QUESTION 17
Given:

What is the result?

• A. Hello
• B. Default
• C. Compilation fails
• D. The program prints nothing
• E. An exception is thrown at run time

Answer: A

Explanation: The program compilesfine. The program runs fine. The output is: hello

NEW QUESTION 18
Given:

What is the result?

• A. 012
• B. 012012012
• C. Compilation fails

Answer: B

Explanation: table.length is 3. So the do-while loop will run 3 times with ii=0, ii=1 and ii=2. The second while statement will break the do-loop when ii = 3.
Note:The Java programming language provides ado-whilestatement, which can be expressed as follows:
do { statement(s)
} while (expression);