1Z0-803 Standard Answers & Java SE 7 Programmer I

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NEW QUESTION NO: 5
Which two items can legally be contained within a java class declaration?
A. An import statement
B. A field declaration
C. A package declaration
D. A method declaration
Answer: B,D


NEW QUESTION NO: 6
Which three are bad practices?
A. Checking for an IOException and ensuring that the program can recover if one occurs
B. Checking for ArrayIndexoutofBoundsException and ensuring that the program can recover if one occur
C. Checking for ArrayIndexoutofBoundsException when iterating through an array to determine when all elements have been visited
D. Checking for FileNotFoundException to inform a user that a filename entered is not valid
E. Checking for Error and. If necessary, restarting the program to ensure that users are unaware problems
Answer: B,C,E


NEW QUESTION NO: 7
The catch clause argument is always of type__________.
A. Exception
B. Exception but NOT including RuntimeException
C. Throwable
D. RuntimeException
E. CheckedException
F. Error
Answer: C


NEW QUESTION NO: 8
Which statement is true about the default constructor of a top-level class?
A. It can take arguments.
B. It has private access modifier in its declaration.
C. It can be overloaded.
D. The default constructor of a subclass always invokes the no-argument constructor of its superclass.
Answer: D


NEW QUESTION NO: 9
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: A,D


NEW QUESTION NO: 10
Identify two benefits of using ArrayList over array in software development.
A. reduces memory footprint
B. implements the Collection API
C. is multi.thread safe
D. dynamically resizes based on the number of elements in the list
Answer: A,D


NEW QUESTION NO: 11
Given the code fragment:
System.out.printIn("Result: " + 2 + 3 + 5);
System.out.printIn("Result: " + 2 + 3 * 5);
What is the result?
A. Result: 10
Result: 30
B. Result: 10
Result: 25
C. Result: 235
Result: 215
D. Result: 215
Result: 215
E. Compilation fails
Answer: C


NEW QUESTION NO: 12
Given:
class X {}
class Y { Y ( ) { } }
class Z { Z (int i ) { } }
Which class has a default constructor?
A. Y only
B. X, Y and Z
C. Z only
D. Y and Z
E. X and Z
F. X and Y
G. X only
Answer: G


NEW QUESTION NO: 13
A method doSomething () that has no exception handling code is modified to trail a method that throws a checked exception. Which two modifications, made independently, will allow the program to compile?
A. Catch the exception in the method doSomething().
B. Declare the exception to be thrown in the doSomething() method signature.
C. Cast the exception to a RunTimeException in the doSomething() method.
D. Catch the exception in the method that calls doSomething().
Answer: B,D


NEW QUESTION NO: 14
Which three statements are benefits of encapsulation?
A. Enables multiple instances of the same class to be created safely
B. Protects confidential data from leaking out of the objects
C. Allows a class implementation to change without changing t he clients
D. Enables the class implementation to protect its invariants
E. Permits classes to be combined into the same package
F. Prevents code from causing exceptions
Answer: B,C,D