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NO.1 Given the code fragment:
System.out.printIn ("Result: " +3+5);
System.out.printIn ("Result: " + (3+5));
What is the result?
A. Result: 8 Result: 8
B. Result: 35 Result: 8
C. Result: 8 Result: 35
D. Result: 35 Result: 35
Answer: B

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Explanation:
In the first statement 3 and 5 are treated as strings and are simply concatenated. In the first
statement 3 and 5 are treated as integers and their sum is calculated.

NO.2 Which two statements are true for a two-dimensional array?
A. It is implemented as an array of the specified element type.
B. Using a row by column convention, each row of a two-dimensional array must be of the same size.
C. At declaration time, the number of elements of the array in each dimension must be specified.
D. All methods of the class Object may be invoked on the two-dimensional array.
Answer: A,D

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NO.3 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: A,B,C

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Explanation:
A:Private constructors prevent a class from being explicitly instantiated by 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 and simple 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

NO.4 Given: Which two declarations will compile?
A. int a, b, c = 0;
B. int a, b, c;
C. int g, int h, int i = 0;
D. int d, e, F;
E. int k, l, m; = 0;
Answer: A,D

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NO.5 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

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

NO.6 Given: What is the result?
A. 7
B. 12
C. 19
D. Compilation fails
E. An exception is thrown at run time
Answer: B

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NO.7 public class ForTest {
public static void main(String[] args) {
int[] arrar = {1,2,3};
for ( foo ) {
} } }
Which three are valid replacements for foo so that the program will compiled and run?
A. int i: array
B. int i = 0; i < 1; i++
C. ;;
D. ; i < 1; i++
E. ; i < 1;
Answer: A,B,C

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NO.8 Given the code fragment:
Int [] [] array = {{0}, {0, 1}, {0, 2, 4}, {0, 3, 6, 9}, {0, 4, 8, 12, 16}};
Systemout.printIn(array [4] [1]);
System.out.printIn (array) [1] [4]);
What is the result?
A. 4 Null
B. Null 4
C. An IllegalArgumentException is thrown at run time
D. 4 An ArrayIndexOutOfBoundException is thrown at run time
Answer: D

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Explanation:
The first println statement, System.out.println(array [4][1]);, works fine. It selects the element/array
with index 4, {0, 4, 8, 12, 16}, and from this array it selects the element with index 1, 4. Output: 4 The
second println statement, System.out.println(array) [1][4]);, fails. It selects the array/element with
index 1, {0, 1}, and from this array it try to select the element with index 4. This causes an exception.
Output: 4
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4

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Exam Code: 1Z0-803
Exam Name: Java SE 7 Programmer I
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1Z0-803 Exam Dumps Total Q&A: 216 Questions and Answers
Last Update: 07-22,2015

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