1Z0-829 Practice Exam — Free Oracle Certification Prep

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Question 1

Java Object-Oriented Approach

Given the code fragment:

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Which set of class definitions compiles?

A interface Story extends SInt {}interface Art extends SInt {}
B public interface Story extends SInt {}public interface Art extends SInt {}
C sealed interface Story extends SInt {}non-sealed class Art implements SInt {}
D non-sealed interface Story extends SInt {}non-sealed interface Art extends SInt {}
E non-sealed interface Story extends SInt {}class Art implements SInt {}

Question 2

Java SE APIs

Question 3

Java SE APIs

Question 4

Java Object-Oriented Approach

Question 5

Java Platform Module System

Question 6

Working with Java Data Types

Question 7

Java SE APIs

Question 8

Working with Java Data Types

Question 9

Working with Streams and Lambda expressions

Question 10

Java I/O API

Question 11

Java I/O API

Question 12

Exception Handling

Question 13

Java I/O API

Question 14

Java SE APIs

Question 15

Java Object-Oriented Approach

Question 16

Working with Java Data Types

Question 17

Controlling Program Flow

Question 18

Java I/O API

Question 19

Concurrency

Question 20

Java Object-Oriented Approach

Question 21

Java Object-Oriented Approach

Question 22

Controlling Program Flow

Question 23

Java Object-Oriented Approach

Question 24

Working with Java Data Types

Question 25

Java I/O API

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Given the code fragment:

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What is the result?

A true:true:false:false
B true:false:true:false
C true:false:true:true
D true:false:false:false

Given the code fragment:

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What is the result?

A 888
B 8109
C 7107
D 777
E 71010
F 81111

Given:

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What is the result?

A 1001001000
B 1011011000
C 10011001000
D 100110011000

Assume you have an automatic module from the module path display-ascii-0.2.jar.
Which name is given to the automatic module based on the given JAR file?

A display-ascii-0
B display-ascii
C display.ascii
D display-ascii-0.2

Question 6

Working with Java Data Types

Question 7

Java SE APIs

Question 8

Working with Java Data Types

Question 9

Working with Streams and Lambda expressions

Question 10

Java I/O API

Question 11

Java I/O API

Question 12

Exception Handling

Question 13

Java I/O API

Question 14

Java SE APIs

Question 15

Java Object-Oriented Approach

Question 16

Working with Java Data Types

Question 17

Controlling Program Flow

Question 18

Java I/O API

Question 19

Concurrency

Question 20

Java Object-Oriented Approach

Question 21

Java Object-Oriented Approach

Question 22

Controlling Program Flow

Question 23

Java Object-Oriented Approach

Question 24

Working with Java Data Types

Question 25

Java I/O API

Given the code fragment:

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What is the result?

A false 0true 1
B false 1false 2
C true 1false 2
D false 1true 2

Which statement is true about migration?

A Every module is moved to the module path in a bottom-up migration.
B Every module is moved to the module path in a top-down migration.
C Unnamed modules are automatic modules in a top-down migration.
D The required modules migrate before the modules that depend on them in a top-down migration.

Given:

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What is the result?

A B A D
B D A D
C B A C
D D D D

Given:

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What is the result?

A Compilation fails.
B wTablewChair TableChair
C TableChair TableChair
D A RuntimeException is thrown.
E wTableChair TableChair

Given the code fragments:

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and:

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Which action prints Wagon : 200?

A At line n1, implement the java.io.AutoCloseable interface.
B At line n3, replace Car with LuxuryCar.
C At line n1, implement the java.io.Serializable interface.
D At line n3, replace readObject() with readLine().
E At line n2, in the main method signature, add throws IOException, ClassNotFoundException.
F At line n2, in the main method signature, add throws IOException, ClassCastException.

Given:

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What is the result?

A Software Game read error
B Software Game Chess 0
C Software Game Software Game Chess 2
D Software Game Chess 2
E Software Game write error
F Software Game Software Game Chess 0

Given:

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Which two modifications enable the code to print Open Close?

A Replace line n1 with:class Folder extends Closeable {
B Replace line n1 with:class Folder implements AutoCloseable {
C
D Replace line n1 with:class Folder extends Exception {
E

Given the content of the in.txt file:
0123456789
and the code fragment:

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What is the content of the out.txt file?

A 012345678
B 01234567801234
C 01234567
D 0123456789
E 012345678901234
F 0123456789234567

Daylight Saving Time (DST) is the practice of advancing clocks at the start of spring by one hour and adjusting them backward by one hour in autumn.
Considering that in 2021, DST in Chicago (Illinois) ended on November 7th at 2 AM, and given the fragment:

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What is the output?

A truetrue
B falsetrue
C truefalse
D falsefalse

Given:

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What is the result?

A mA
B mBmA
C mB
D mBmC

Given the code fragment:

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Which two statements at Line n1 independently enable you to print 1250? (Choose two.)

A Integer res = 250 + Integer.parseInt(s);
B Integer res = 250 + Integer.valueOf(s);
C Integer res = 250 + s2;
D Integer res = 250;res =+ s2;
E Integer res = 250 + s;
F Integer res = 250 + Integer(s2);

Which statement is true?

A The lock() method returns a boolean indicator immediately regardless if it has or has not managed to acquire the lock.
B The lock() method returns a boolean indicator immediately if it has managed to acquire the lock, otherwise it waits for the lock acquisition.
C The tryLock() method returns a boolean indicator immediately if it has managed to acquire the lock, otherwise it waits for the lock acquisition.
D The tryLock() method returns a boolean indicator immediately regardless if it has or has not managed to acquire the lock.

Assuming that the data.txt file exists and has the following content: text1 text2 text3
Given the code fragment:

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