Mar 2021 updated: Actualtests Oracle 1z0-808 torrent 71-80

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2021 Mar 1z0-808 free practice test

Q71. Given the code fragment: 

Which statement is true? 

A. After line 8, three objects are eligible for garbage collection 

B. After line 8, two objects are eligible for garbage collection 

C. After line 8, one object is eligible for garbage collection 

D. After line 8, none of the objects are eligible for garbage collection 


Q72. Given the classes: 

* AssertionError 

* ArithmeticException 

* ArrayIndexOutofBoundsException 

* FileNotFoundException 

* IllegalArgumentException 

* IOError 

* IOException 

* NumberFormatException 

* SQLException 

Which option lists only those classes that belong to the unchecked exception category? 

A. AssertionError, ArrayIndexOutOfBoundsException, ArithmeticException 

B. AssertionError, IOError, IOException 

C. ArithmeticException, FileNotFoundException, NumberFormatException 

D. FileNotFoundException, IOException, SQLException 

E. ArrayIndexOutOfBoundException, IllegalArgumentException, FileNotFoundException 


Explanation: Not B: IOError and IOException are both checked errors. 

Not C, not D, not E: FileNotFoundException is a checked error. 


Checked exceptions: 

* represent invalid conditions in areas outside the immediate control of the program (invalid user input, database problems, network outages, absent files) 

* are subclasses of Exception 

* a method is obliged to establish a policy for all checked exceptions thrown by its implementation (either pass the checked exception further up the stack, or handle it 



Unchecked exceptions: 

* represent defects in the program (bugs) - often invalid arguments passed to a non-private method. To quote from The Java Programming Language, by Gosling, Arnold, and Holmes: "Unchecked runtime exceptions represent conditions that, generally speaking, reflect errors in your program's logic and cannot be reasonably recovered from at run time." 

* are subclasses of RuntimeException, and are usually implemented using IllegalArgumentException, NullPointerException, or IllegalStateException 

* method is not obliged to establish a policy for the unchecked exceptions thrown by its implementation (and they almost always do not do so) 

Q73. Given the code fragment: 

What is the result? 

A. Found Red 

Found Default 

B. Found Teal 

C. Found Red 

Found Blue 

Found Teal 

D. Found Red 

Found Blue 

Found Teal 

Found Default 

E. Found Default 


Q74. Given: 


public class SuperTest { 

public static void main(String[] args) { 




class Shape { 

public Shape() { 

System.out.println("Shape: constructor"); 

public void foo() { 

System.out.println("Shape: foo"); 

class Square extends Shape { 

public Square() { 


public Square(String label) { 

System.out.println("Square: constructor"); 

public void foo() {; 

public void foo(String label) { 

System.out.println("Square: foo"); 

What should statement1, statement2, and statement3, be respectively, in order to produce the result? 

Shape: constructor 

Square: foo 

Shape: foo 

A. Square square = new Square ("bar"); ("bar");; 

B. Square square = new Square ("bar"); ("bar"); ("bar"); 

C. Square square = new Square (); ();; 

D. Square square = new Square (); ();"bar"); 

E. Square square = new Square (); (); (); 

F. Square square = new Square();"bar");; 


Q75. Given: 

What is the result? 

A. The sum is 2 

B. The sum is 14 

C. The sum is 15 

D. The loop executes infinite times 

E. Compilation fails 


Renovate 1z0-808 practice test:

Q76. Given: 

What is the result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 


Q77. What is the name of the Java concept that uses access modifiers to protect variables and hide them within a class? 

A. Encapsulation 

B. Inheritance 

C. Abstraction 

D. Instantiation 

E. Polymorphism 


Q78. Given the code fragment: 

What is the result? 

A. 20 

B. 25 

C. 29 

D. Compilation fails 

E. AnArrayIndexOutOfBoundsException is thrown at runtime 


Q79. Which three are advantages of the Java exception mechanism? 

A. Improves the program structure because the error handling code is separated from the normal program function 

B. Provides a set of standard exceptions that covers all the possible errors 

C. Improves the program structure because the programmer can choose where to handle exceptions 

D. Improves the program structure because exceptions must be handled in the method in which they occurred 

E. Allows the creation of new exceptions that are tailored to the particular program being created 

Answer: A,C,E 

Q80. 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. 


Explanation: In both Java and C#, a "default constructor" refers to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class. The default constructor is also empty, meaning that it does nothing. A programmer-defined constructor that takes no parameters is also called a default constructor. 

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