NEW QUESTION 1
Given the following main method:

What is the result?

• A. 5 4 3 2 1 0
• B. 5 4 3 2 1
• C. 4 2 1
• D. 5
• E. Nothing is printed

Answer: D

NEW QUESTION 2
Given the code fragment:

What is the result?

• A. AB
• B. A element 0B element 1
• C. A NullPointerException is thrown at runtime.
• D. A 0B 1

Answer: C

NEW QUESTION 3
Which two code fragments cause a compilation error? (Choose two.)

• A. float flt = 100.00F;
• B. float flt = (float) 1_11.00;
• C. Float flt = 100.00;
• D. double y1 = 203.22;float flt = y1;
• E. int y2 = 100;float flt = (float) y2 ;

Answer: AD

NEW QUESTION 4
Given:

What is the result?

• A. 200.0 : 100.0
• B. 400.0 : 200.0
• C. 400.0 : 100.0
• D. Compilation fails.

Answer: C

NEW QUESTION 5
Given the code fragment:

What is the result?

• A. 1324
• B. 2313
• C. 3142
• D. 4231

Answer: D

NEW QUESTION 6
Which three statements are true about the structure of a Java class? (Choose three.)

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

Answer: ACE

NEW QUESTION 7
Given the code fragment:

Which modification enables the code to print 54321?

• A. Replace line 6 with System.out.print (--x);
• B. At line 7, insert x --;
• C. Replace line 5 with while (is Available(--x)) {
• D. Replace line 12 with return (x > 0) ? false : true;

Answer: C

NEW QUESTION 8
Given the content of three files:

Which statement is true?

• A. Only the A.Java file compiles successfully.
• B. Only the B.java file compiles successfully.
• C. Only the C.java file compiles successfully.
• D. The A.Java and B.java files compile successfully.
• E. The B.java and C.java files compile successfully.
• F. The A.Java and C.java files compile successfully.

Answer: A

NEW QUESTION 9
Given:

What is the result?

• A. Compilation fails at line n3 and line n4.
• B. Compilation fails at line n1 and line n2.
• C. Welcome Visit Count:1Welcome Visit Count: 1
• D. Welcome Visit Count:1Welcome Visit Count: 2

Answer: B

NEW QUESTION 10
Which statement is true about Java byte code?

• A. It can run on any platform.
• B. It can run on any platform only if it was compiled for that platform.
• C. It can run on any platform that has the Java Runtime Environment.
• D. It can run on any platform that has a Java compiler.
• E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.

Answer: D

Explanation:
Java bytecodes help make "write once, run anywhere" possible. You can compile your program into bytecodes on any platform that has a Java compiler. The bytecodes can then be run on any implementation of the Java VM. That means that as long as a computer has a Java VM, the same program written in the Java programming language can run on Windows 2000, a Solaris workstation, or on an iMac.

NEW QUESTION 11
Given:

What is the result?

• A. Welcome Visit Count:0Welcome Visit Count: 1
• B. Compilation fails at line n2.
• C. Compilation fails at line n1.
• D. Welcome Visit Count:0Welcome Visit Count: 0

Answer: C

Explanation:

NEW QUESTION 12
Given:

What is the result?

• A. nullRichardDonald
• B. RichardDonald
• C. Compilation fails.
• D. An ArrayIndexOutOfBoundsException is thrown at runtime.
• E. A NullPointerException is thrown at runtime.

Answer: E

NEW QUESTION 13
Which two statements are true? (Choose two.)

• A. Error class is unextendable.
• B. Error class is extendable.
• C. Error is a RuntimeException.
• D. Error is an Exception.
• E. Error is a Throwable.

Answer: BC

NEW QUESTION 14
What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class?

• A. Encapsulation
• B. Inheritance
• C. Abstraction
• D. Instantiation
• E. Polymorphism

Answer: A

Explanation:
Using the private modifier is the main way that an object encapsulates itself and hide data from the outside world.

NEW QUESTION 15
Given the code from the Greeting.Java file:

Which set of commands prints Hello Duke in the console?

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

Answer: C

NEW QUESTION 16
Which three statements are true about the structure of a Java class? (Choose three.)

• A. A class cannot have the same name as its field.
• B. A public class must have a main method.
• C. A class can have final static methods.
• D. A class can have overloaded private constructors.
• E. Fields need to be initialized before use.
• F. Methods and fields are optional components of a class.

Answer: BDE

NEW QUESTION 17
Given:

What is the result?

• A. AB
• B. AC
• C. CC
• D. A ClassCastException is thrown only at line n1.
• E. A ClassCastException is thrown only at line n2.

Answer: B

NEW QUESTION 18
Which statement is true about the switch statement?

• A. It must contain the default section.
• B. The break statement, at the end of each case block, is optional.
• C. Its case label literals can be changed at runtime.
• D. Its expression must evaluate to a collection of values.

Answer: B

NEW QUESTION 19
Given:

What is the result?

• A. A B C D
• B. A C D
• C. A C D D
• D. A B D
• E. A B D C

Answer: C

NEW QUESTION 20
Given this segment of code:

Which two statements, if either were true, would make the code compile? (Choose two.)

• A. MotorCycle is an interface that implements the Cycle class.
• B. Cycle is an interface that is implemented by the MotorCycle class.
• C. Cycle is an abstract superclass of MotorCycle.
• D. Cycle and MotorCycle both extend the Transportation superclass.
• E. Cycle and MotorCycle both implement the Transportation interface.
• F. MotorCycle is a superclass of Cycle.

Answer: BC

NEW QUESTION 21
Given this class:

And given this main method, located in another class:

Which three pieces of code, when inserted independently, set the value of amount to 100?

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

Answer: DE

NEW QUESTION 22
This grid shows the state of a 2D array:

The grid is created with this code:

Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive Xs?

• A. grid[2][1] = ‘X’;
• B. grid[3][2] = ‘X’;
• C. grid[3][1] = ‘X’;
• D. grid[2][3] = ‘X’;

Answer: D

NEW QUESTION 23
You are asked to create a method that accepts an array of integers and returns the highest value from that array.
Given the code fragment:

Which method signature do you use at line n1?

• A. public int findMax (int[] numbers)
• B. static int[] findMax (int[] max)
• C. static int findMax (int[] numbers)
• D. final int findMax (int[] )

Answer: C

NEW QUESTION 24
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