Abreast Of The Times Java SE 11 Developer 1Z0-819 Pdf

NEW QUESTION 1
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. A, because it sends exactly the value of user provided by the calling code.
• B. B, because enquoting values provided by the calling code prevents SQL injection.
• C. A and B are functionally equivalent.
• D. A, because it is unnecessary to enclose identifiers in quotes.
• E. B, because all values provided by the calling code should be enquoted.

Answer: A

NEW QUESTION 2
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. Nothing, because it is an internal tool and not exposed to the public.
• B. Remove the grant because it is excessive.
• C. Nothing, because it is not related to the bug you are investigating.
• D. File a security bug against the tool referencing the excessive permission granted.
• E. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

Answer: D

NEW QUESTION 3
Given: Automobile.java

Car.java

What must you do so that the code prints 4?

• A. Remove the parameter from wheels method in line 3.
• B. Add @Override annotation in line 2.
• C. Replace the code in line 2 with Car ob = new Car();
• D. Remove abstract keyword in line 1.

Answer: B

Explanation:

NEW QUESTION 4
Given:

Which two lines of code when inserted in line 1 correctly modifies instance variables? (Choose two.)

• A. setCCount(c) = cCount;
• B. tCount = tCount;
• C. setGCount(g);
• D. cCount = setCCount(c);
• E. aCount = a;

Answer: BE

NEW QUESTION 5
Which describes a characteristic of setting up the Java development environment?

• A. Setting up the Java development environment requires that you also install the JRE.
• B. The Java development environment is set up for all operating systems by default.
• C. You set up the Java development environment for a specific operating system when you install the JDK.
• D. Setting up the Java development environment occurs when you install an IDE before the JDK.

Answer: D

NEW QUESTION 6
Given:

Which three are true? (Choose three.)

• A. b1.foo(c) prints Bonjour le monde!
• B. f1.foo(c) prints Hello world!
• C. f1.foo(c) prints Olá Mundo!
• D. b1.foo(c) prints Hello world!
• E. f2.foo(c) prints Olá Mundo!
• F. b1.foo(c) prints Olá Mundo!
• G. f2.foo(c) prints Bonjour le monde!
• H. f2.foo(c) prints Hello world!
• I. f1.foo(c) prints Bonjour le monde!

Answer: BFG

NEW QUESTION 7
Given:

What is the result?

• A. An exception is thrown at runtim
• B. 42=(x+y)=42
• C. 42=(x+y)=6
• D. 6=(x+y)=42
• E. 6=(x+y)=6

Answer: D

Explanation:

NEW QUESTION 8
Which two statements correctly describe capabilities of interfaces and abstract classes? (Choose two.)

• A. Interfaces cannot have protected methods but abstract classes can.
• B. Both interfaces and abstract classes can have final methods.
• C. Interfaces cannot have instance fields but abstract classes can.
• D. Interfaces cannot have static methods but abstract classes can.
• E. Interfaces cannot have methods with bodies but abstract classes can.

Answer: AC

NEW QUESTION 9
Given:

Which three are correct? (Choose three.)

• A. b1.foo(li) prints Hello world!
• B. f1.foo(li) prints Bonjour le monde!
• C. f1.foo(li) prints Hello world!
• D. f1.foo(li) prints Hola Mundo!
• E. b1.foo(li) prints Bonjour le monde!
• F. f2.foo(li) prints Hola Mundo!
• G. f2.foo(li) prints Bonjour le monde!
• H. b1.foo(li) prints Hola Mundo!
• I. f2.foo(li) prints Hello world!

Answer: ABH

NEW QUESTION 10
Given:

What is the result?

• A. watermelonorangelemongrapeapricotapple
• B. nothing
• C. appleapricotgrapelemonorangewatermelon
• D. appleorangegrapelemonapricotwatermelon

Answer: A

Explanation:

NEW QUESTION 11
Given:

Assume the file on path does not exist. What is the result?

• A. The compilation fails.
• B. /u01/work/filestore.txt is not deleted.
• C. Exception
• D. /u01/work/filestore.txt is deleted.

Answer: A

Explanation:

NEW QUESTION 12
Given:

What is the result?

• A. Map: 0 Keys: 0 Values: 0
• B. The compilation fails.
• C. Map: 4 Keys: 4 Values: 4
• D. Map: 4 Keys: 0 Values: 0
• E. Map: 0 Keys: 4 Values: 4

Answer: D

Explanation:

NEW QUESTION 13
Which two are successful examples of autoboxing? (Choose two.)

• A. String a = “A”;
• B. Integer e = 5;
• C. Float g = Float.valueOf(null);
• D. Double d = 4;
• E. Long c = 23L;
• F. Float f = 6.0;

Answer: AB

NEW QUESTION 14
Which interface in the java.util.function package will return a void return type?

• A. Supplier
• B. Predicate
• C. Function
• D. Consumer

Answer: D

NEW QUESTION 15
Which describes an aspect of Java that contributes to high performance?

• A. Java prioritizes garbage collection.
• B. Java has a library of built-in functions that can be used to enable pipeline burst execution.
• C. Java monitors and optimizes code that is frequently executed.
• D. Java automatically parallelizes code execution.

Answer: C

NEW QUESTION 16
Which is a proper JDBC URL?

• A. jdbe.mysql.com://localhost:3306/database
• B. http://localhost.mysql.com:3306/database
• C. http://localhostmysql.jdbc:3306/database
• D. jdbc:mysql://localhost:3306/database

Answer: D

NEW QUESTION 17
Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

• A. B cannot be abstract.
• B. B is a subtype of A.
• C. A cannot be abstract.
• D. A cannot be final.
• E. B cannot be final.
• F. A is a subtype of B.

Answer: ABD

NEW QUESTION 18
Which statement about access modifiers is correct?

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

Answer: B

NEW QUESTION 19
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