Oracle Java SE 1z1-819 Practice Test Engine Try These 215 Exam Questions [Q55-Q77]

Oracle Java SE 1z1-819 Practice Test Engine: Try These 215 Exam Questions

Guaranteed Success in Oracle Java SE 1z1-819 Exam Dumps

Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819

The following will be discussed in the ORACLE 1Z0-006 dumps:

Use local variable type inference, including as lambda parameters
Handle text using String and StringBuilder classes
Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting

How to book the Java SE 11 Developer Exam Number: 1Z0-819

You register with an Oracle partner pearsonvue.com, tie your Oracle account, choose whether you want to pass in the center or from home. If you choose the option from home, you will be followed through the camera and microphone throughout the exam, there should be no one in the room, you can not talk to anyone and look only at the screen, the Internet must be stable, without troubles, otherwise, the result will be canceled.

Oracle 1z1-819 Exam Syllabus Topics:

Topic	Details
Topic 1	Deploy and execute modular applications, including automatic modules Implement functional interfaces using lambda expressions
Topic 2	Secure resource access including filesystems, manage policies and execute privileged code Develop thread-safe code, using different locking mechanisms
Topic 3	Develop code that mitigates security threats such as denial of service Use Java Streams to filter, transform and process data
Topic 4	Handle text using String and StringBuilder classes Utilize polymorphism and casting to call methods, differentiate object type versus reference type
Topic 5	Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting Sort collections and arrays using Comparator and Comparable interfaces
Topic 6	Understand variable scopes, apply encapsulation and make objects immutable Connect to and perform database SQL operations, process query results using JDBC API
Topic 7	Implement serialization and deserialization techniques on Java objects Declare and instantiate Java objects including nested class objects
Topic 8	Define and use fields and methods, including instance, static and overloaded methods Working with Arrays and Collections
Topic 9	Create and use subclasses and superclasses, including abstract classes Use local variable type inference, including as lambda parameters
Topic 10	Create and use interfaces, identify functional interfaces Initialize objects and their members using instance and static initialiser statements and constructors

NEW QUESTION 55
Given:

Which one is correct?

A. An IllegalThreadStateException is thrown at run time.
B. The compilation fails.
C. Four threads are created.
D. Three threads are created.

Answer: A

Explanation:

NEW QUESTION 56
Given:

Which expression when added at line 1 will produce the output of 1.17?

A. float z = Math.round((float)x/y,2);
B. float z = Math.round((int)(x/y),2);
C. float z = Math.round((float)x/y*100)/(float)100;
D. float z = (float)(Math.round((float)x/y*100)/100);

Answer: C

Explanation:

NEW QUESTION 57
Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?
A)

B)

C)

D)

A. Option D
B. Option B
C. Option A
D. Option C

Answer: A

NEW QUESTION 58
Given:

Which two are secure serialization of these objects? (Choose two.)

A. Define the serialPersistentFields array field.
B. Make the class abstract.
C. Implement only readResolve to replace the instance with a serial proxy and not writeReplace.
D. Declare fields transient.
E. Implement only writeReplace to replace the instance with a serial proxy and not readResolve.

Answer: A,C

NEW QUESTION 59
What change will cause the code to compile successfully?

A. Insert PriceChecker <> prod on line 1.
B. Insert PriceChecker <Electronics> prod on line 1.
C. Insert PriceChecker (?) prod on line 1.
D. Insert PriceChecker <Plushy extends Products> prod on line 1.

Answer: C

NEW QUESTION 60
Which two are functional interfaces? (Choose two.)

A. Option E
B. Option D
C. Option B
D. Option A
E. Option C

Answer: A,E

NEW QUESTION 61
Given:

What is the result?

A. 1.99,2.99,0
B. 1.99,2.99
C. The compilation fails.
D. 1.99,2.99,0.0

Answer: C

Explanation:

NEW QUESTION 62
Given:

Which is true?

A. The compilation fails due to an error in line 7.
B. The compilation fails due to an error in line 10.
C. The compilation fails due to an error in line 2.
D. The compilation fails due to an error in line 4.
E. The compilation fails due to an error in line 6.
F. The compilation succeeds.
G. The compilation fails due to an error in line 9.

Answer: E

NEW QUESTION 63
Given:

and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?

A. The body of foo can throw FooException or one of its subclasses.
B. The body of foo can only throw FooException.
C. FooException is a subclass of RuntimeError.
D. FooException is unchecked.

Answer: A

NEW QUESTION 64
Which statement about access modifiers is correct?

A. An abstract method can be declared with the private modifier.
B. A local variable can be declared with the final modifier.
C. An inner class cannot be declared with the public modifier.
D. An instance variable can be declared with the static modifier.
E. An interface can be declared with the protected modifier.

Answer: B

NEW QUESTION 65
Given the code fragment:

What is the result?

A. The compilation fails at line 16.
B. The compilation fails at line
C. 0
D. The compilation fails at line 13.
E. 1

Answer: C

NEW QUESTION 66
Given:
LocalDate d1 = LocalDate.of(1997,2,7);
DateTimeFormatter dtf =
DateTimeFormatter.ofPattern( /*insert code here*/ );
System.out.println(dtf.format (d1));
Which pattern formats the date as Friday 7th of February 1997?

A. "eeee dd+"th of"+ MMM yyyy"
B. "eeee dd'th of' MMM yyyy"
C. "eeee d'th of' MMMM yyyy"
D. "eeee d+"th of"+ MMMM yyyy"

Answer: B

NEW QUESTION 67
Given:

Which expression when added at line 1 will produce the output of 1.17?

A. float z = Math.round((float)x/y,2);
B. float z = Math.round((int)(x/y),2);
C. float z = Math.round((float)x/y*100)/(float)100;
D. float z = (float)(Math.round((float)x/y*100)/100);

Answer: C

Explanation:

NEW QUESTION 68
Which two commands are used to identify class and module dependencies? (Choose two.)

A. java --show-module-resolution
B. jdeps --list-deps
C. jar --show-module-resolution
D. java Hello.java
E. jmod describe

Answer: A,B

NEW QUESTION 69
Given the code fragment:
Path currentFile = Paths.get("/scratch/exam/temp.txt");
Path outputFile = Paths get("/scratch/exam/new.txt");
Path directory = Paths.get("/scratch/");
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?

A. The program throws a FileaAlreadyExistsException.
B. /scratch/exam/new.txt and /scratch/new.txt are deleted.
C. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
D. The program throws a NoSuchFileException.

Answer: D

Explanation:

NEW QUESTION 70
Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

A. .map(Employee::getLocality)
.distinct()
.count();
B. .map(e > e.getLocality())
.collect(Collectors.toSet())
.count();
C. .filter(Employee::getLocality)
.distinct()
.count();
D. map(e > e.getLocality())
.count();

Answer: C

NEW QUESTION 71
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)

A. Locale.setDefault("en_CA");
B. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");
C. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);
D. Locale.setDefault("es", Locale.US);
E. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);

Answer: A,E

NEW QUESTION 72
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

A. Any module that attempts to require the java.se module actually requires the java.sql module instead.
B. Only a module that requires the java.se module is permitted to require the java.sql module.
C. Any module that requires the java.se module does not need to require the java.sql module.
D. Any module that requires the java.sql module does not need to require the java.se module.

Answer: B

NEW QUESTION 73
Given:

What is the output?