NEW QUESTION 1
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 2
Which two statements are true about Java byte code? (Choose two.)

• A. It can be serialized across network.
• B. It can run on any platform that has a Java compiler.
• C. It can run on any platform.
• D. It has “.java” extension.
• E. It can run on any platform that has the Java Runtime Environment.

Answer: AE

NEW QUESTION 3
Given the code fragment:

What is the result?

• A. 2012-02-10
• B. 2012-02-11
• C. Compilation fails
• D. A DateTimeException is thrown at runtime.

Answer: D

NEW QUESTION 4
Given the code snippet from a compiled Java source file:

Which command-line arguments should you pass to the program to obtain the following output? Arg is 2

• A. java MyFile 1 3 2 2
• B. java MyFile 2 2 2
• C. java MyFile 1 2 2 3 4
• D. java MyFile 0 1 2 3

Answer: A

NEW QUESTION 5
Given:

What is the result?

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

Answer: A

NEW QUESTION 6
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 7
Given the code fragment:

What is the result if the integer aVar is 9?

• A. Compilation fails.
• B. 10 Hello Universe!
• C. 10 Hello World!
• D. 9 Hello World!

Answer: B

NEW QUESTION 8
Given:

What is the result?

• A. An exception is thrown at runtime.
• B. InitializedStartedInitialized
• C. InitializedStarted
• D. Compilation fails.

Answer: D

NEW QUESTION 9
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 10
Which is true about the switch statement?

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

Answer: B

NEW QUESTION 11
Given this code for a Planet object:

What is the output?

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

Answer: C

NEW QUESTION 12
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 13
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 14
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 15
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 16
Given this class:

Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

• A. Call the setArea method at the end of the setHeight method.
• B. Call the setArea method at the beginning of the setHeight method.
• C. Call the setArea method at the end of the setLength method.
• D. Call the setArea method at the beginning of the setLength method.
• E. Change the setArea method to private.
• F. Change the area field to public.

Answer: AE

NEW QUESTION 17
Given:

What is the result?

• A. 3 4 5 6
• B. 3 4 3 6
• C. 5 4 5 6
• D. 3 6 5 6

Answer: D

Explanation:

NEW QUESTION 18
Given the code fragment:

What is the result?

• A. Match 1
• B. Match 2
• C. No Match
• D. A NullPointerException is thrown at runtime.

Answer: A

NEW QUESTION 19
Which statement will empty the contents of a StringBuilder variable named sb?

• A. s
• B. deleteAll ();
• C. s
• D. delete (0, s
• E. size () );
• F. s
• G. delete (0, s
• H. length () );
• I. s
• J. removeAll ();

Answer: C

NEW QUESTION 20
Which statement best describes encapsulation?

• A. Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects.
• B. Encapsulation ensures that classes can be designed so that their methods are inheritable.
• C. Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.
• D. Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method.

Answer: A

NEW QUESTION 21
Given the code fragment:

What is the result?

• A. Sum is 600
• B. Compilation fails at line n1.
• C. Compilation fails at line n2.
• D. A ClassCastException is thrown at line n1.
• E. A ClassCastException is thrown at line n2.

Answer: C

NEW QUESTION 22
Given:

And given the commands:

What is the result?

• A. 1 null
• B. true false
• C. false false
• D. true true
• E. A ClassCastException is thrown at runtime.

Answer: D

NEW QUESTION 23
Given the code fragment:

What is the result?

• A. Compilation fails.
• B. 0 Found
• C. 1 Found
• D. 3 Found

Answer: A

NEW QUESTION 24
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