Java SE 7 Programmer I
Exam Number: 1Z0-803 / 1Z0-803
Duration: 120 minutes
Associated Certifications: Oracle Certified Associate, Java SE 7 Programmer
Number of Questions: 70
Exam Product Version: Java SE,
Passing Score: 63%
Exam Price: US$ 150
Validated Against:
This exam has been validated against SE 7.
format: Multiple Choice
Recommended Training
Exam Preparation Seminar
- Certification Exam Prep Seminar: Java SE 7 Programmer I
- Exam Prep Seminar Value Package: OCA Java SE 7 Programmer I
Practice Exams
- Practice Exams: Oracle authorized practice exam from Kaplan SelfTest:1Z0-803: Java SE 7 Programmer I
- Practice Exams: Oracle practice exam from Transcender: 1Z0-803 DevCert: Java SE 7 Programmer I
- Sample Questions
TOPICS
Java Basics
- Define the scope of variables
- Define the structure of a Java class
- Create executable Java applications with a main method
- Import other Java packages to make them accessible in your code
Working With Java Data Types
- Declare and initialize variables
- Differentiate between object reference variables and primitive variables
- Read or write to object fields
- Explain an Object's Lifecycle (creation, "dereference" and garbage collection)
- Call methods on objects
- Manipulate data using the StringBuilder class and its methods
- Creating and manipulating Strings
Using Operators and Decision Constructs
- Use Java operators
- Use parenthesis to override operator precedence
- Test equality between Strings and other objects using == and equals ()
- Create if and if/else constructs
- Use a switch statement
Creating and Using Arrays
- Declare, instantiate, initialize and use a one-dimensional array
- Declare, instantiate, initialize and use multi-dimensional array
- Declare and use an ArrayList
Using Loop Constructs
- Create and use while loops
- Create and use for loops including the enhanced for loop
- Create and use do/while loops
- Compare loop constructs
- Use break and continue
Working with Methods and Encapsulation
- Create methods with arguments and return values
- Apply the static keyword to methods and fields
- Create an overloaded method
- Differentiate between default and user defined constructors
- Create and overload constructors
- Apply access modifiers
- Apply encapsulation principles to a class
- Determine the effect upon object references and primitive values when they are passed into methods that change the values
Working with Inheritance
- Implement inheritance
- Develop code that demonstrates the use of polymorphism
- Differentiate between the type of a reference and the type of an object
- Determine when casting is necessary
- Use super and this to access objects and constructors
- Use abstract classes and interfaces
Handling Exceptions
- Differentiate among checked exceptions, RuntimeExceptions and Errors
- Create a try-catch block and determine how exceptions alter normal program flow
- Describe what Exceptions are used for in Java
- Invoke a method that throws an exception
- Recognize common exception classes and categories
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Exam Code:
1Z0-803Exam Name: Java SE 7 Programmer I
One year free update, No help, Full refund!
1Z0-803 Test Answers Total Q&A: 216 Questions and Answers
Last Update: 03-11,2015
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NO.1 View the exhibit:
public class Student {
public String name =
"";
public int age = 0;
public String major = "Undeclared";
public
boolean fulltime = true;
public void display() {
System.out.println("Name:
" + name + " Major: " + major); }
public boolean isFullTime() {
return
fulltime;
}
}
Which line of code initializes a student instance?
A.
Student student1;
B. Student student1 = Student.new();
C. Student student1
= new Student();
D. Student student1 = Student();
Answer:
C
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NO.2 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.3
Given:
What is the result?
A. Compilation fails
B. An exception is
thrown at runtime
C. There is no result because this is not correct way to
determine the hash code
D. Hash is: 111111, 44444444, 999999999
Answer:
A
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Explanation:
The
compilation fails as SampleClassA and SampleClassB cannot override SampleClass
because the
return type of SampleClass is int, while the return type of
SampleClassA and SampleClassB is long.
Note: If all three classes had the
same return type the output would be: Hash is : 111111,
44444444,
999999999
NO.4 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
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Explanation:
The line,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.
NO.5
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.6 Given:
public
class ComputeSum {
public int x;
public int y;
public int
sum;
public ComputeSum (int nx, int ny) {
x = nx; y
=ny;
updateSum();
}
public void setX(int nx) { x = nx;
updateSum();}
public void setY(int ny) { x = ny; updateSum();}
void
updateSum() { sum = x + y;}
}
This class needs to protect an invariant on
the sum field.
Which three members must have the private access modifier to
ensure that this invariant is
maintained?
A. The x field
B. The y
field
C. The sum field
D. The ComputerSum ( ) constructor
E. The setX (
) method
F. The setY ( ) method
Answer:
C,E,F
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Explanation:
The sum field and the two methods (setX
and SetY) that updates the sum field.
NO.7 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.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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