Oracle 1Z0-808 Java SE 8 Programmer I Exam Practice Test Questions

• Question 1

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

  • Objects cannot be reused.
    
  • A subclass must override the methods from a superclass.
    
  • Objects can share behaviors with other objects.
    
  • A package must contain a main class.
    
  • Object is the root class of all other objects.
    
  • A main method must be declared in every class.
    

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• Question 2

  Which two code fragments cause a compilation error? (Choose two.)

  • float flt = 100.00F;
    
  • float flt = (float) 1_11.00;
    
  • Float flt = 100.00;
    
  • double y1 = 203.22;float flt = y1;
    
  • int y2 = 100;float flt = (float) y2 ;
    

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• Question 3

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

  • Encapsulation
    
  • Inheritance
    
  • Abstraction
    
  • Instantiation
    
  • Polymorphism
    

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• Question 4

  Which statement is true about the switch statement?

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

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• Question 5

  Which two statements are true about Java byte code? (Choose two.)

  • It can be serialized across network.
    
  • It can run on any platform that has a Java compiler.
    
  • It can run on any platform.
    
  • It has ''.java'' extension.
    
  • It can run on any platform that has the Java Runtime Environment.
    

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