[Jan 13, 2022] Free Java SE 1z0-809 Exam Question
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NEW QUESTION 88
Given the code fragment
Which code fragments, inserted independently, enable the code compile?
- A. this.fvar = 200;
Test2.cvar = 400; - B. cvar = 400;
- C. fvar = 200; cvar = 400;
- D. t.fvar = 200; Test2.cvar = 400;
- E. this.fvar = 200; this.cvar = 400;
- F. t.fvar = 200;
Answer: B
NEW QUESTION 89
Given the code fragment:
List<String> listVal = Arrays.asList("Joe", "Paul", "Alice", "Tom");
System.out.println (
// line n1
);
Which code fragment, when inserted at line n1, enables the code to print the count of string elements whose length is greater than three?
- A. listVal.stream().peek(x -> x.length()>3).count().get()
- B. listVal.stream().map(x -> x.length()>3).count()
- C. listVal.stream().filter(x -> x.length()>3).count()
- D. listVal.stream().filter(x -> x.length()>3).mapToInt(x -> x).count()
Answer: C
NEW QUESTION 90
Given the code fragment:
What is the result?
- A. A B D C
- B. A C D
- C. A B C C
- D. A B C D
- E. A B D
Answer: C
NEW QUESTION 91
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 92
Given:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException {//line n1
System.out.println("Happy Journey!");
}
}
class SolarVehicle extends Vehicle {
public void ride () throws Exception {//line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws FuelNotAvailException, Exception { Vehicle v = new SolarVehicle (); v.ride();
}
Which modification enables the code fragment to print Happy Journey!?
- A. Replace line n2 with void ride() throws Exception {
- B. Replace line n1 with protected void ride() throws Exception {
- C. Replace line n1 with public void ride() throws FuelNotAvailException {
- D. Replace line n2 with private void ride() throws FuelNotAvailException {
Answer: B
NEW QUESTION 93
Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + ":" + name + ":" + city;
}
public String getCourse() {return course;}
public String getName() {return name;}
public String getCity() {return city;}
and the code fragment:
List<Student> stds = Arrays.asList(
new Student ("Jessy", "Java ME", "Chicago"),
new Student ("Helen", "Java EE", "Houston"),
new Student ("Mark", "Java ME", "Chicago"));
stds.stream()
.collect(Collectors.groupingBy(Student::getCourse))
.forEach(src, res) -> System.out.println(res));
What is the result?
- A. A compilation error occurs.
- B. Java EEJava ME
- C. [Java EE: Helen:Houston][Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
- D. [Java ME: Jessy:Chicago, Java ME: Mark:Chicago][Java EE: Helen:Houston]
Answer: B
NEW QUESTION 94
Given that course.txt is accessible and contains:
Course : : Java
and given the code fragment:
public static void main (String[ ] args) {
int i;
char c;
try (FileInputStream fis = new FileInputStream (“course.txt”);
InputStreamReader isr = new InputStreamReader(fis);) {
while (isr.ready()) { //line n1
isr.skip(2);
i = isr.read ();
c = (char) i;
System.out.print(c);
}
} catch (Exception e) {
e.printStackTrace();
}
}
What is the result?
ur :: va
- A. A compilation error occurs at line n1.
- B.
- C. ueJa
- D. The program prints nothing.
Answer: B
NEW QUESTION 95
Given: What is the result?
- A. Marrown String out of limits JesOran
- B. Marrown String out of limits
- C. Marrown NanRed JesOran
- D. Marrown String out of limits Array out of limits
Answer: A
NEW QUESTION 96
Given the definition of the Emp class:
public class Emp
private String eName;
private Integer eAge;
Emp(String eN, Integer eA) {
this.eName = eN;
this.eAge = eA;
}
public Integer getEAge () {return eAge;}
public String getEName () {return eName;}
}
and code fragment:
List<Emp>li = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp("Jim", 51)); Predicate<Emp> agVal = s -> s.getEAge() > 50;//line n1 li = li.stream().filter(agVal).collect(Collectors.toList()); Stream<String> names = li.stream()map.(Emp::getEName);//line n2 names.forEach(n -> System.out.print(n + " ")); What is the result?
- A. A compilation error occurs at line n1.
- B. A compilation error occurs at line n2.
- C. John Jim
- D. Sam John Jim
Answer: D
NEW QUESTION 97
Given the code fragments :
and
What is the result?
- A. TV Price :1000 Refrigerator Price :2000
- B. A compilation error occurs.
- C. TV Price :110 Refrigerator Price :2100
- D. The program prints nothing.
Answer: A
NEW QUESTION 98
Given:
and the code fragment:
What is the result?
- A. A compilation error occurs.
- B. 2000.0
- C. 0.0
- D. 1500.0
Answer: D
NEW QUESTION 99
Given:
Which option fails?
- A. Foo<Object, Object> percentage = new Foo<String, Integer>("Steve", 100);
- B. Foo<String, String> grade = new Foo <> ("John", "A");
- C. Foo<String, String> pair = Foo.<String>twice ("Hello World!");
- D. Foo<String, Integer> mark = new Foo<String, Integer> ("Steve", 100);
Answer: D
NEW QUESTION 100
Given: What is the result?
- A. Compilation fails due to an error in line n1
- B. Compilation fails due to an error at line n3
- C. 100 210
- D. Compilation fails due to an error at line n2
Answer: D
NEW QUESTION 101
Given:
And given the code fragment:
What is the result?
- A. 200:300
200:300 - B. 300:300
200:300 - C. 300:100
200:300 - D. 300:0
0:300
Answer: C
NEW QUESTION 102
public class ForTest {
public static void main(String[] args) {
int[] arrar = {1,2,3};
for ( foo ) {
}
}
}
Which three are valid replacements for foo so that the program will compiled and run?
- A. ; i < 1; i++
- B. ;;
- C. ; i < 1;
- D. int i: array
- E. int i = 0; i < 1; i++
Answer: B,D,E
NEW QUESTION 103
Given:
public interface Moveable<Integer> {
public default void walk (Integer distance) {System.out.println("Walking");)
public void run(Integer distance);
}
Which statement is true?
- A. Movable cannot be used in a lambda expression.
- B. Moveable can be used as below:Moveable animal = (Integer n) - >
System.out.println(n);animal.run(100);Moveable.walk(20); - C. Moveable can be used as below:Moveable<Integer> animal = n - > System.out.println("Running" +
n);animal.run(100);animal.walk(20); - D. Moveable can be used as below:Moveable<Integer> animal = n - > n +
10;animal.run(100);animal.walk(20);
Answer: C
NEW QUESTION 104
Given:
And given the commands:
What is the result?
- A. false false
- B. true true
- C. true false
- D. TRUE null
- E. A ClassCastException is thrown at runtime.
Answer: C
NEW QUESTION 105
......
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