Free Oracle 1Z0-850 Practice Test & Real Exam Questions

Exam Code/Number: 1Z0-850
Exam Name/Title: Java Standard Edition 5 and 6, Certified Associate Exam
Certification Provider: Oracle
Corresponding Certification: Java Technology

Exam Questions: 242
Updated On: Jun 16, 2026

Question #1

Click the Exhibit button. Which class correctly implements the interface Flyer?

A. Airplane

B. Helicopter

C. Lark

D. Penguin

Discussion 0

Correct Answer: A Vote an answer

Question #2

Click the Exhibit button. Which is an abstract class?

A. Cat

B. Rabbit

C. Mouse

D. Dog

Discussion 0

Correct Answer: C Vote an answer

Question #3

Which is true?

A. A J2SE program can create no more than 10 concurrent threads.

B. The Java threading model provides equal processor time to all threads.

C. Threading allows GUI applications to perform lengthy calculations and respond to user events at the same time.

D. All threads created by a given Java program share the same invocation stack.

Discussion 0

Correct Answer: C Vote an answer

Question #4

Which is a disadvantage of using J2EE server-side technologies in a web-based application?

A. maintainability

B. support for many different clients

C. complexity

D. scalability

Discussion 0

Correct Answer: C Vote an answer

Question #5

Which three compile without error? (Choose three.)

A. String str = "Hello" + " World!";

B. String str = 'Hello';

C. String str = new String('Hello');

D. String str = "Hello" - " World!";

E. String str = new String("Hello");

F. String str = "Hello";

Discussion 0

Correct Answer: A,E,F Vote an answer

Question #6

Which type of primitive can be assigned a new value within a conditional expression?

A. boolean

B. char

C. short

D. int

E. byte

Discussion 0

Correct Answer: A Vote an answer

Question #7

Which is valid?

A. package com.example;
class Test { }
import java.util.*;

B. package com.example;
package com.sun;
import java.util.*;
class Test { }

C. import java.util.*;
package com.example;
class Test { }

D. package com.example;
import java.util;
import java.*;
class Test { }

E. package com.example;
import java.util.*;
import java.io.*;
class Test { }

Discussion 0

Correct Answer: E Vote an answer

Question #8

Given:
1 . abstract class A {}
2 . class B {}
3 . interface C {}
4 . interface D {}
5 . // insert code here
Which, inserted at line 5, results in a compilation failure?

A. class E extends A {}

B. class E extends B implements D {}

C. class E implements C {}

D. class E implements C, D {}

E. interface E extends C, D {}

F. class E extends A, B {}

Discussion 0

Correct Answer: F Vote an answer

Question #9

Which two packages are used to create GUI programs in J2SE? (Choose two.)

A. java.awt

B. java.util

C. javax.swing

D. java.io

E. java.net

Discussion 0

Correct Answer: A,C Vote an answer

Question #10

Which two are true? (Choose two.)

A. A class can implement more than one interface.

B. An interface can implement another interface.

C. Every class must implement at least one interface.

D. Many classes can implement the same interface.

Discussion 0

Correct Answer: A,D Vote an answer

Question #11

How can the two class paths be set for the javac compiler? (Choose two.)

A. using the BIN environment variable

B. using the -classpath option to javac

C. using the -classes option to javac

D. using the -classpath option to java

E. using the -sourcepath option to javac

F. using the CLASSPATH environment variable

G. using the PATH environment variable

Discussion 0

Correct Answer: B,F Vote an answer

Question #12

Click the Exhibit button. Which is true?

A. Juku is a subclass of Hara and at least one other class.

B. This is NOT a valid UML diagram.

C. Juku implements the Hara interface.

D. Every Juku has a reference to at least one Hara.

E. Juku is a subclass of Hara.

Discussion 0

Correct Answer: B Vote an answer

Question #13

What type of relationship is needed to represent the relationship between students and the courses they are enrolled in at a university?

A. a one-to-one association

B. a one-to-many association

C. a many-to-many composition

D. a one-to-many composition

E. a many-to-many association

F. a one-to-one composition

Discussion 0

Correct Answer: E Vote an answer

Question #14

Click the Exhibit button. Which is the class name?

A. name

B. bark

C. age

D. eat

E. Dog

Discussion 0

Correct Answer: E Vote an answer

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