Certification Topics of 1Z0-819 Exam PDF Recently Updated Questions
1Z0-819 Exam Prep Guide: Prep guide for the 1Z0-819 Exam
NEW QUESTION # 46
Your organization makes mlib.jar available to your cloud customers. While working on a code cleanup project for mlib.jar, you see this method by customers:
What security measures should be added to this method so that it meets the requirements for a customer accessible method?
- A. Make enableService private.
- B. Create a method that validates the hostName and portNumber parameters before opening the socket.
- C.
- D. Enclose the call to new Socket In an AccessController.doPrivileged block.
Answer: D
NEW QUESTION # 47
Given the formula to calculate a monthly mortgage payment:
and these declarations:
How can you code the formula?
- A. m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;
- B. m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));
- C. m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);
- D. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));
Answer: D
NEW QUESTION # 48
Consider this method declaration:
A) "SET SESSION AUTHORIZATION " + user
B) "SET SESSION AUTHORIZATION " + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?
- A. B, because all values provided by the calling code should be enquoted.
- B. A, because it is unnecessary to enclose identifiers in quotes.
- C. B, because enquoting values provided by the calling code prevents SQL injection.
- D. A and B are functionally equivalent.
- E. A, because it sends exactly the value of user provided by the calling code.
Answer: E
NEW QUESTION # 49
Given:
What is the output?
banana orange apple lemon
- A. -----
banana orange apple lemon apple banana lemon orange
banana orange apple lemon apple banana lemon orange - B. banana orange apple lemon
-----
apple banana lemon orange
----- - C. -----
----- - D. -----
apple banana lemon orange
-----
----- - E. -----
-----
Answer: A
Explanation:
NEW QUESTION # 50
Given:
What is the result?
- A. Take extra care
Take extra care - B. The program prints nothing.
- C. An exception is thrown at runtime
- D. Take extra care
Answer: C
NEW QUESTION # 51
Given the code fragment:
What is the result?
- A. [Red:75, Red:100, Yellow:500, Red100 Red: 75]
- B. Yellow:75, Yellow:50, Red:100, Red:75]
- C. [Red:100, Red75, Yello:75, Yellow:50]
- D. [Yellow:50, yellow:75, Red:75, Red:100]
- E. An Exception is thrown at runtime.
Answer: A
NEW QUESTION # 52
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)
B)
C)
D)
- A. Option C
- B. Option D
- C. Option B
- D. Option A
Answer: A
NEW QUESTION # 53
Given:
What is the output?
- A. 0
- B. Exception
- C. 1
- D. 2
Answer: D
Explanation:
NEW QUESTION # 54
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 55
Given:
Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)
- A. public List<Object> foo(Set<CharSequence> m) { ... }
- B. public ArrayList<Integer> foo(Set<String> m) { ... }
- C. public ArrayList<Number> foo(Set<CharSequence> m) { ... }
- D. public List<Integer> foo(TreeSet<String> m) { ... }
- E. public List<Integer> foo(Set<CharSequence> m) { ... }
- F. public List<Integer> foo(Set<String> m) { ... }
Answer: C,D
NEW QUESTION # 56
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Any module that requires the java.sql module does not need to require the java.se module.
- B. Any module that requires the java.se module does not need to require the java.sql module.
- C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
- D. Only a module that requires the java.se module is permitted to require the java.sql module.
Answer: D
NEW QUESTION # 57
Given:
What is the result?
- A. TuesdayUnknown
- B. Unknown
- C. Tuesday
- D. The compilation fails.
- E. WorkingUnknown
- F. Working
Answer: B
Explanation:
NEW QUESTION # 58
Given the code fragment:
What is the result?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 59
Given:
When run and all three files exist, what is the state of each reader on Line 1?
- A. All three readers have been closed.
- B. All three readers are still open.
- C. Only reader1 has been closed.
- D. The compilation fails.
Answer: D
NEW QUESTION # 60
Given the code fragment:
Which "for" loop produces the same output?
- A. Option C
- B. Option D
- C. Option B
- D. Option A
Answer: A
NEW QUESTION # 61
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- A. MyInterface2
- B. MyInterface1
- C. MyInterface5
- D. MyInterface3
- E. MyInterface4
Answer: A,D
NEW QUESTION # 62
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. An exception is thrown at runtime.
Answer: B
Explanation:
NEW QUESTION # 63
You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.
What action should you take?
- A. File a security bug against the tool referencing the excessive permission granted.
- B. Remove the grant because it is excessive.
- C. Nothing, because it is not related to the bug you are investigating.
- D. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.
- E. Nothing, because it is an internal tool and not exposed to the public.
Answer: A
NEW QUESTION # 64
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
- A. module PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
} - B. module PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
} - C. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
} - D. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
}
Answer: D
NEW QUESTION # 65
Given:
What is the result?
- A. The compilation fails at line 8.
- B. The compilation fails at line 9.
- C. The compilation fails at line 2.
- D. Hello World
Answer: D
Explanation:
NEW QUESTION # 66
Given:
Which two are correct? (Choose two.)
- A. Option C
- B. Option B
- C. Option D
- D. Option A
Answer: A,C
NEW QUESTION # 67
......
The 1Z0-819 certification exam covers a wide range of topics related to Java programming, including Java fundamentals, object-oriented programming, Java collections, Java I/O, Java concurrency, and Java database connectivity. 1Z0-819 exam also tests the candidate's knowledge of Java tools and technologies, such as JavaFX, JavaBeans, and Java Servlets.
The Oracle 1Z0-819 exam covers a wide range of topics, including Java syntax and data types, object-oriented programming principles, exception handling, and concurrency. Candidates are expected to be familiar with the Java SE 11 platform and have experience in developing and testing Java applications. 1Z0-819 exam is designed to test both theoretical knowledge and practical skills, and candidates are required to complete coding tasks and answer multiple-choice questions.
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