[Dec 28, 2023] 100% Pass Guarantee for 1Z0-819 Dumps with Actual Exam Questions [Q120-Q141]

[Dec 28, 2023] 100% Pass Guarantee for 1Z0-819 Dumps with Actual Exam Questions

Today Updated 1Z0-819 Exam Dumps Actual Questions

NEW QUESTION # 120
Given:

And the command:
java Main Helloworld
What is the result ?

A. Input: Echo:
B. A NullPointerException is thrown at run time.
C. Input:
Echo: Helloworld
D. Input:
Then block until any input comes from System.in.
E. Input: Helloworld Echo: Helloworld

Answer: D

Explanation:

NEW QUESTION # 121
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 # 122
A company has an existing Java app that includes two Java 8 jar files, sales-3.10. jar and clients-10.2.jar.
The jar file ,sales -8, 10, jar reference packages in clients -10.2 jar, but clients-10.2 jar does not reference packages in sales -8.10, jar.
They have decided to modularize clients-10.2.jar.
Which module-info. Java file would work for the new library version clients-10.3 jar?
A)

B)

C)

D)

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

Answer: D

NEW QUESTION # 123
Given:

What is the result?

A. 1-5
2-4
B. 0-6
1-5
2-4
C. 0-6
2-4
D. 1-5
E. 2-4
F. The compilation fails due to an error in line 1.
G. 0-6

Answer: D

Explanation:
Explanation
Graphical user interface, text, application Description automatically generated

NEW QUESTION # 124
Which two safely validate inputs? (Choose two.)

A. Accept only valid characters and input values.
B. Assume inputs have already been validated.
C. Use trusted domain-specific libraries to validate inputs.
D. Delegate numeric range checking of values to the database.
E. Modify the input values, as needed, to pass validation.

Answer: A,D

NEW QUESTION # 125
Which statement about a functional interface is true?

A. It must be annotated with @FunctionalInterface.
B. It is declared with a single abstract method.
C. It is declared with a single default method.
D. It cannot have any private methods and static methods.
E. It must be defined with the public access modifier.

Answer: B

NEW QUESTION # 126
Which describes a characteristic of setting up the Java development environment?

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

Answer: B

NEW QUESTION # 127
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 C
B. Option B
C. Option A
D. Option D

Answer: D

NEW QUESTION # 128
Given the code fragment:
List<Integer> list = List.of(11,12,13,12,13);
Which statement causes a compile time error?

A. double f = list.get(0);
B. Double d = list.get(0);
C. Integer a = Integer.valueOf(list.get(0));
D. Integer b = list.get(0);
E. Double e = Double.valueOf(list.get(0));
F. int c =list.get(0);

Answer: C

NEW QUESTION # 129
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. /u01/work/filestore.txt is deleted.
D. Exception

Answer: A

Explanation:

NEW QUESTION # 130
Given:

Which statement on line 1 enables this code to compile?

A. Function<int, int> f = n -> n * 2;
B. Function<Integer> f = n -> n * 2;
C. Function<Integer, Integer> f = n -> n * 2;
D. Function f = n -> n * 2;
E. Function<int> f = n -> n * 2;

Answer: C

Explanation:

NEW QUESTION # 131
Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

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

Answer: B

NEW QUESTION # 132
Given:

Which statement is equivalent to line 1?

A. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);
B. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
C. double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
D. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;

Answer: B

Explanation:

NEW QUESTION # 133
Given the code fragment:
public void foo(Function<Integer, String> fun) {...}
Which two compile? (Choose two.)

A. foo( toHexString )
B. foo( n::toHexString )
C. foo( Integer::toHexString )
D. foo( n -> Integer.toHexString(n) )
E. foo( int n -> Integer.toHexString(n) )
F. foo( (int n) -> Integer.toHexString(n) )
G. foo( n -> Integer::toHexString )
H. foo( n -> n + 1 )

Answer: D,H

Explanation:
Explanation/Reference:

NEW QUESTION # 134
Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

A. MyInterface5
B. MyInterface4
C. MyInterface3
D. MyInterface2
E. MyInterface1

Answer: A,D

NEW QUESTION # 135
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 # 136
Given:

and

Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1,
1989?

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

Answer: C

NEW QUESTION # 137
Given this enum declaration:

Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?