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Oracle 1z0-808 Exam Questions

Oracle 1z0-808 Exam Questions Answers

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Oracle 1z0-808 Sample Questions – Free Practice Test & Real Exam Prep

Question #1

Which three are advantages of the Java exception mechanism? (Choose three.)

  • A. Improves the program structure because the error handling code is separated from thenormal program function
  • B. Provides a set of standard exceptions that covers all possible errors
  • C. Improves the program structure because the programmer can choose where to handleexceptions
  • D. Improves the program structure because exceptions must be handled in the method inwhich they occurred
  • E. Allows the creation of new exceptions that are customized to the particular programbeing created
Answer: A,C,E
Explanation: References:
Question #2

Which is true about the switch statement?

  • A. Its expression can evaluate to a collection of values.
  • B. The break statement, at the end of each case block, is optional.
  • C. Its case label literals can be changed at runtime.
  • D. It must contain the default section.
Answer: B
Explanation: References:
Question #3

Which three statements describe the object-oriented features of the Java language?(Choose three.)

  • A. Objects cannot be reused.
  • B. A subclass must override the methods from a superclass.
  • C. Objects can share behaviors with other objects.
  • D. A package must contain a main class.
  • E. Object is the root class of all other objects.
  • F. A main method must be declared in every class.
Answer: B,C,F
Explanation: References:
Question #4

Which statement best describes encapsulation?

  • A. Encapsulation ensures that classes can be designed so that only certain fields andmethods of an object are accessible from other objects.
  • B. Encapsulation ensures that classes can be designed so that their methods areinheritable.
  • C. Encapsulation ensures that classes can be designed with some fields and methodsdeclared as abstract.
  • D. Encapsulation ensures that classes can be designed so that if a method has anargument MyType x, any subclass of MyType can be passed to that method.
Answer: A
Question #5

Which statement is true about the main() method?

  • A. It is invoked by JRE
  • B. It is a final method
  • C. It returns true if it is executed successfully at run time
  • D. It must be defined within a public class
Question #6

Which three statements are true about the structure of a Java class? (Choose three.)

  • A. A public class must have a main method.
  • B. A class can have only one private constructors.
  • C. A method can have the same name as a field.
  • D. A class can have overloaded static methods.
  • E. The methods are mandatory components of a class.
  • F. The fields need not be initialized before use.
Answer: A,C,E
Question #7

Which two array initialization statements are valid? (Choose two.)

  • A. int array[] = new int[3] {1, 2, 3};
  • B. int array[] = new int[3]; array[0] = 1;array[1] = 2;array[2] = 3;
  • C. int array[3] = new int[] {1, 2, 3};
  • D. int array[] = new int[3]; array = {1, 2, 3};
  • E. int array[] = new int[] {1,2,3};
Answer: B,E
Reference: https://stackoverflow.com/QUESTION NO:s/1200621/how-do-i-declare-andinitialize-
an-array-in-java
Question #8

Given these requirements:Bus and Boat are Vehicle type classes.The start() and stop() methods perform common operations across the Vehicleclass type.The ride() method performs a unique operations for each type of Vehicle.Which set of actions meets the requirements with optimized code?

  • A. 1. Create an abstract class Vehicle by defining start() and stop() methods, and declaringthe ride()abstract method. 2. Create Bus and Boat classes by inheriting the Vehicle class and overriding the ride()method.
  • B. 1. Create an interface Vehicle by defining start() and stop() methods, and declaring theride()abstract method.2. Create Bus and Boat classes by implementing the Vehicle class.
  • C. 1. Create an abstract class Vehicle by declaring stop(), start(), and ride() abstractmethods.2. Create Bus and Boat classes by inheriting the Vehicle class and overriding all themethods.
  • D. 1. Create an interface Vehicle by defining default stop(), start(), and ride() methods.2. Create Bus and Boat classes by implementing the Vehicle interface and overriding theride()method.
Answer: B
Question #9

Which two features can be implemented in a Java application by encapsulating the entityclasses used? (Choose two.)

  • A. data validation
  • B. compile time polymorphism
  • C. data hiding
  • D. data abstraction
  • E. data memory optimization
Question #10

Which statement is true about the switch statement?

  • A. It must contain the default section.
  • B. The break statement, at the end of each case block, is optional.
  • C. Its case label literals can be changed at runtime.
  • D. Its expression must evaluate to a collection of values.
Answer: B
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