New 2022 1z1-808 Dumps for Java and Middleware Certified Exam Questions and Answer
Realistic Verified 1z1-808 exam dumps Q&As - 1z1-808 Free Update
NEW QUESTION 44
Given the code fragment:
What is the result?
- A. Compilation fails
- B. 10 8 6 4 2
- C. AnArithmeticException is thrown at runtime
- D. The program goes into an infinite loop outputting: 10 8 6 4 2 0. . .
- E. 10 8 6 4 2 0
Answer: B
NEW QUESTION 45
Given the code fragment:
What is the result?
- A. 10 : 10
- B. Compilation fails
- C. 5 : 10
- D. 5 : 5
Answer: A
NEW QUESTION 46
Given the following code for a Planet object:
What is the output?
- A. Option B
- B. Option C
- C. Option D
- D. Option A
- E. Option E
Answer: B
NEW QUESTION 47
Given the code fragment:
What is the result?
- A. Compilation fails only at line n1.
- B. Answer = 0
- C. Invalid calculation
- D. Compilation fails only at line n1andline2.
- E. Compilation fails only at line n2.
Answer: D
NEW QUESTION 48
Which statement is true about Java byte code?
- A. It can run on any platform that has the Java Runtime Environment.
- B. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.
- C. It can run on any platform.
- D. It can run on any platform only if it was compiled for that platform.
- E. It can run on any platform that has a Java compiler.
Answer: E
Explanation:
Java bytecodes help make "write once, run anywhere" possible. You can compile your program into bytecodes on any platform that has a Java compiler. The bytecodes can then be run on any implementation of the Java VM. That means that as long as a computer has a Java VM, the same program written in the Java programming language can run on Windows 2000, a Solaris workstation, or on an iMac.
Reference: http://www.math.uni-hamburg.de/doc/java/tutorial/getStarted/intro/definition.html
NEW QUESTION 49
Given the code fragment:
Which option represents the state of the num array after successful completion of the outer loop?
- A. Option A
- B. Option B
- C. Option D
- D. Option C
Answer: A
NEW QUESTION 50
Given:
And given the commands:
What is the result?
- A. true false
- B. 1 null
- C. true true
- D. A ClassCastException is thrown at runtime.
- E. false false
Answer: C
NEW QUESTION 51
Given:
Which option enables the code to compile?
- A. Option B
- B. Option C
- C. Option D
- D. Option A
Answer: B
NEW QUESTION 52
Given the following segment of code :
Which two statements, if either were true, would make the code compile? (Choose two.)
- A. Motorcycleis a superclass of Vehicle.
- B. Motorcycleis an interface that implements the Vehicleclass.
- C. Vehicleand Motorcycleboth implement the Transportationinterface
- D. Vehicleand Motorcycleboth extend the Transportation superclass.
- E. Vehicleis an interface that is implemented by the Motorcycleclass.
- F. Vehicleis a superclass of Motorcycle.
Answer: E,F
NEW QUESTION 53
Given the code fragment:
What is the result?
- A. Compilation fails.
- B. 0
- C. 1
- D. 2
Answer: D
NEW QUESTION 54
The following grid shows the state of a 2D array:
This grid is created with the following code:
Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive X's?
- A. grid[3][1] = 'X';
- B. grid[2][0] = 'X';
- C. grid[1][3] = 'X';
- D. grid[0][2] = 'X';
- E. grid[1][2] = 'X';
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION 55
Which three statements are true about the structure of a Java class?
- A. The fields need not be initialized before use.
- B. A class can have overloaded static methods.
- C. A public class must have a main method.
- D. A class can have only one private constructor.
- E. The methods are mandatory components of a class.
- F. A method can have the same name as a field.
Answer: B,D,F
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 56
Given:
Which two code fragments are valid?
- A. Option C
- B. Option D
- C. Option A
- D. Option B
- E. Option E
Answer: A,D
Explanation:
When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (C). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract-it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.
NEW QUESTION 57
Which two statements are true for a two-dimensional array of primitive data type?
- A. The length of each dimension must be the same.
- B. It cannot contain elements of different types.
- C. All methods of the class object may be invoked on the two-dimensional array.
- D. At the declaration time, the number of elements of the array in each dimension must be specified.
Answer: C,D
Explanation:
http://stackoverflow.com/questions/12806739/is-an-array-a-primitive-type-oran-object-or-something-else-entirely
NEW QUESTION 58
Given the code fragment:
What is the result?
- A. Jesse 25
Walter 52 - B. Compilation fails at both line n1 and line n2
- C. Compilation fails only at line n2
- D. Compilation fails only at line n1
Answer: D
NEW QUESTION 59
Given:
And given the code fragment:
What is the result?
- A. 300:100200:300
- B. 200:300200:300
- C. 300:300200:300
- D. 300:00:300
Answer: B
NEW QUESTION 60
Given: What is the result?
- A. Compilation fails at line n2
- B. 10:20
- C. 0:20
- D. Compilation fails at line n1
Answer: B
NEW QUESTION 61
Which statement is/are true?
I. Default constructor only contains "super();" call.
II. We can't use any access modifier with a constructor.
III.
A constructor should not have a return type.
- A. Only I and III.
- B. Only II.
- C. Only I and II.
- D. AIL
- E. Only I.
Answer: A
Explanation:
Statement I is correct as the default constructor only contains super0 call
Statement II is incorrect as we can use any access modifier with a constructor.
Statement III is correct as constructor can't have return type, even void.
So option D is correct.
httpsy/docs.oracle.com/javase/tutorial/iava/javaOO/construaors.html
NEW QUESTION 62
Given the code snippet from a compiled Java source file:
and this output:
Which command should you run to obtain this output?
- A. java MyFile
2 - B. java MyFile 2 2
- C. java MyFile 1 2 3 4
- D. java MyFile 1 2 2
Answer: A
NEW QUESTION 63
Given:
What is the result?
- A. 0:20
- B. 10:20
- C. Compilation fails at line n2
- D. Compilation fails at line n1
Answer: C
NEW QUESTION 64
Given the code fragment:
Which option can replace xxx to enable the code to print 135?
- A. int e = 0; e < = 4; e++
- B. int e = 1; e < = 5; e + = 1
- C. int e = 1; e < 5; e+ =2
- D. int e = 0; e < 5; e + = 2
Answer: D
NEW QUESTION 65
......
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