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To take the Oracle 1z0-808 Exam, candidates should have a solid understanding of Java programming fundamentals, including variables, data types, operators, control structures, classes, and objects. They should also be familiar with object-oriented programming concepts, such as inheritance, encapsulation, and polymorphism. Additionally, candidates should have experience working with Java libraries and APIs.

Oracle Java SE 8 Programmer I Sample Questions (Q366-Q371):

NEW QUESTION # 366
Given the code fragment:

Which three code fragments can be independently inserted at line n1 to enable the code to print one?
(Choose three.)

A. Integer x = new Integer ("1");
B. String x = "1";
C. Long x = 1;
D. Double x = 1;
E. short x = 1;
F. Byte x = 1;

Answer: A,E,F

NEW QUESTION # 367
Given the code fragment:

What is the result?

A. It results in a compile time error at line 18.
B. It results in a compile time error at line 9.
C. It prints : 1
D. It results in a compile time error at lines at lines 12 and 15.

Answer: A

Explanation:

NEW QUESTION # 368
Given:

What is the result?

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

Answer: A

NEW QUESTION # 369
Given the code fragment:

Which code fragment, when inserted at line n1, enables the App class to print Equal?

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

Answer: D

NEW QUESTION # 370
Which three statements are true about the structure of a Java class?

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

Answer: B,C,E

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

NEW QUESTION # 371
......

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