13 March, 2022

Up To Date 1z0-808 Exam For Java SE 8 Programmer I Certification

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Free demo questions for Oracle 1z0-808 Exam Dumps Below:

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Total 156 questions Full Exam Access

Question 1

Given:

What is the result?

BaseDerivedA

BaseDerivedB

DerivedBDerivedB

DerivedBDerivedA

A ClassCastException is thrown at runtime.

Question 2

Given:

What is the result?

nullRichardDonald

RichardDonald

Compilation fails.

An ArrayIndexOutOfBoundsException is thrown at runtime.

A NullPointerException is thrown at runtime.

Question 3

Which statement best describes encapsulation?

Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects.

Encapsulation ensures that classes can be designed so that their methods are inheritable.

Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.

Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method.

Question 4

Given:

What is the result?

A ClassCastException is thrown only at line n1.

A ClassCastException is thrown only at line n2.

Question 5

Given the code snippet from a compiled Java source file:
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Which command-line arguments should you pass to the program to obtain the following output? Arg is 2

java MyFile 1 3 2 2

java MyFile 2 2 2

java MyFile 1 2 2 3 4

java MyFile 0 1 2 3

Question 6

Given the code fragment:
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What is the result?

A element 0B element 1

A NullPointerException is thrown at runtime.

A 0B 1

Question 7

Given the code from the Greeting.Java file:
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Which set of commands prints Hello Duke in the console?
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Option A

Option B

Option C

Option D

Question 8

Given the code fragment:
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What is the result?

Compilation fails.

0 Found

1 Found

3 Found

Question 9

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 mandatory.

Its case label literals can be changed at runtime.

Its expression must evaluate to a single value.

Question 10

Given:

What is the result?

Compilation fails.

3 5

0 0

9 25

Question 11

Given the code fragment:
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What is the result?

Match 1

Match 2

No Match

A NullPointerException is thrown at runtime.

Question 12

Given the code fragment:
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Which two modifications, made independently, enable the code to compile? (Choose two.)

Make the method at line n1 public.

Make the method at line n2 public.

Make the method at line n3 public.

Make the method at line n3 protected.

Make the method at line n4 public.

Question 13

Given the code fragment:
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Which two modifications, when made independently, enable the code to print Joe:true: 100.0? (Choose two.)
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Option A

Option B

Option C

Option D

Option E

Question 14

Given the code fragment:
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What is the result?

Sum is 600

Compilation fails at line n1.

Compilation fails at line n2.

A ClassCastException is thrown at line n1.

A ClassCastException is thrown at line n2.

Question 15

Given this class:
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And given this main method, located in another class:
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Which three pieces of code, when inserted independently, set the value of amount to 100?
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Option A

Option B

Option C

Option D

Option E

Option F

Question 16

Given the code fragment:
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Which three code fragments are valid at line n1?
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Option A

Option B

Option C

Option D

Option E

Question 17

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.

Question 18

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.

Question 19

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

Question 20

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

A class cannot have the same name as its field.

A public class must have a main method.

A class can have final static methods.

A class can have overloaded private constructors.

Fields need to be initialized before use.

Methods and fields are optional components of a class.

Question 21

Given:

What is the result?

10 20 30 40

0 0 30 40

Compilation fails.

An exception is thrown at runtime.

Question 22

Given:

And given the code fragment: Book book1 = new EBook(); book1.readBook();
Which option enables the code to compile?
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Option A

Option B

Option C

Option D

Question 23

You are asked to create a method that accepts an array of integers and returns the highest value from that array.
Given the code fragment:
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Which method signature do you use at line n1?

public int findMax (int[] numbers)

static int[] findMax (int[] max)

static int findMax (int[] numbers)

final int findMax (int[] )

Question 24

Given this class:
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Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

Call the setArea method at the end of the setHeight method.

Call the setArea method at the beginning of the setHeight method.

Call the setArea method at the end of the setLength method.

Call the setArea method at the beginning of the setLength method.

Change the setArea method to private.

Change the area field to public.

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Total 156 questions Full Exam Access