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NEW QUESTION 21
Assume ds is a DataSource and the EMP table is defined appropriately.
What does executing this code fragment do?
- A. throws a SQLException
- B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
- C. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
- D. inserts one row (101, 'SMITH', 'HR')
Answer: D
NEW QUESTION 22
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((float)x/y*100)/(float)100;
- C. float z = (float)(Math.round((float)x/y*100)/100);
- D. float z = Math.round((int)(x/y),2);
Answer: B
Explanation:
NEW QUESTION 23 
And the code fragment:
Which situation will occur on code fragment execution?
- A. Livelock
- B. Race Condition
- C. Starvation
- D. Deadlock
Answer: C
NEW QUESTION 24
Given:
and
What is the result?
Joe
- A. Marry
null - B. Mary
Joe - C. null
null - D. null
Answer: C
Explanation:
NEW QUESTION 25
A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: A
NEW QUESTION 26
Given:
What is the expected result of javac?
- A. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
- B. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class
- C. javac compiles Mycar.java without errors or warnings.
- D. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error:
expected import java.lang
Answer: C
NEW QUESTION 27
Given:
What is the result?
- A. Keys: 0 Values: 0 Map: 0
- B. Keys: 4 Values: 4 Map: 4
- C. Keys: 4 Values: 4 Map: 0
- D. Keys: 0 Values: 0 Map:
- E. The compilation fails.
Answer: B
NEW QUESTION 28
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. java -cp /code a.Test
- B. java /code/a/Test.java
- C. java /code/a/Test.java /code/b/Best.java
- D. javac -d /code /code/a/Test.java /code/b/Best.java
- E. javac -d /code /code/a/Test.java
- F. javac -d /code /code/a/Test
Answer: D
NEW QUESTION 29
Given:
What is the result?
- A. Y@<< hashcode>>
- B. HH
- C. Null
- D. The compilation fails.
Answer: A
NEW QUESTION 30
Given the code fragment:
What is the result?
- A. 2 : -1
- B. 2 : 3
- C. -1 : 2
- D. 3 : 0
Answer: A
NEW QUESTION 31
Given:
Which one is correct?
- A. Four threads are created.
- B. An IllegalThreadStateException is thrown at run time.
- C. The compilation fails.
- D. Three threads are created.
Answer: B
Explanation:
NEW QUESTION 32
Given:
What is the output?
- A. A compilation error is thrown.
- B. Message from Abstract Copier: Attempt00
- C. Message from Copier: Attempt00
- D. A runtime error is thrown.
Answer: A
NEW QUESTION 33
Given:
What will secure this code from a potential Denial of Service condition?
- A. On Line 1, use try with resources when opening each dataReader.
- B. Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.
- C. After Line 3, add dataReader.close().
- D. After Line 4, add indexReader.close().
- E. On Line 3, enclose processData(dataReader) with try with resources.
Answer: E
NEW QUESTION 34
Given an application with a main module that has this module-info.java file:
Which two are true? (Choose two.)
- A. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
- B. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
- C. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
- D. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
- E. An implementation of country.countryDetails can be added to the main module.
Answer: B,C
Explanation:
Reference:
/java-9-error-not-in-a-module-on-the-module-source- path
NEW QUESTION 35
Given:
executed using command:
java Hello "Hello World" Hello World
What is the output?
- A. Hello World Hello World
- B. Hello WorldHello World
- C. An exception is thrown at runtime.
- D. HelloHello WorldHelloWorld
- E. Hello WorldHelloWorld
Answer: A
NEW QUESTION 36
Given:
What is the output?
- A. Hello world!Bonjour le monde!
- B. Hello world!Hello world!
- C. Bonjour le monde!Hello world!
- D. Bonjour le monde!Bonjour le monde!
Answer: C
Explanation:
NEW QUESTION 37
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((float)x/y*100)/(float)100;
- C. float z = (float)(Math.round((float)x/y*100)/100);
- D. float z = Math.round((int)(x/y),2);
Answer: B
Explanation:
NEW QUESTION 38
Given:
What is the output?
- A. A NullPointerException is thrown at run time.
- B. A NoSuchElementException is thrown at run time.
- C. Duke
- D. null
Answer: C
Explanation:
NEW QUESTION 39
Given:
Which two allow a.Main to allocate a new Person? (Choose two.)
- A. In Line 1, change the access modifier to publicpublic Person() {
- B. In Line 1, change the access modifier to privateprivate Person() {
- C. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();
- D. In Line 2, change the access modifier to protectedprotected class Main {
- E. In Line 1, remove the access modifierPerson() {
Answer: A,C
NEW QUESTION 40
Given:
What is the result?
- A. Dr. Who
- B. An exception is thrown at runtime.
- C. null
- D. Dr. Null
Answer: C
Explanation:
NEW QUESTION 41
Given:
You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?
- A. Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2. - B. Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2. - C. Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2. - D. Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.
Answer: A
NEW QUESTION 42
Given:
This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?
- A. Consumer consumer = var arg > {System.out.print(arg);};
- B. Consumer consumer = (String args) > System.out.print(args);
- C. Consumer consumer = System.out::print;
- D. Consumer consumer = msg -> { return System.out.print(msg); };
Answer: C
Explanation:
NEW QUESTION 43
Given:
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. B is a subtype of A.
- B. B cannot be abstract.
- C. A cannot be final.
- D. A is a subtype of B.
- E. A cannot be abstract.
- F. B cannot be final.
Answer: A,B,C
NEW QUESTION 44
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. An exception is thrown at runtime.
Answer: C
Explanation:
NEW QUESTION 45
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