1Z0-809 Free Practice Test

Given the definition of the Vehicle class: class Vehicle {
String name;
void setName (String name) { this.name = name;
}
String getName() { return name;
}
}
Which action encapsulates the Vehicle class?

1. A. Make the Vehicle class public.
2. B. Make the name variable public.
3. C. Make the setName method public.
4. D. Make the name variable private.
5. E. Make the setName method private.
6. F. Make the getName method private.

Correct Answer: D

Given the code fragment:
List codes = Arrays.asList (10, 20); UnaryOperator uo = s -> s +10.0; codes.replaceAll(uo);
codes.forEach(c -> System.out.println(c)); What is the result?

1. A. 20.030.0
2. B. 1020
3. C. A compilation error occurs.
4. D. A NumberFormatException is thrown at run time.

Correct Answer: C

Given the code fragment:

Which code fragment, when inserted at line n1, ensures false is printed?

1. A. boolean b = cs.stream() .findAny() .get() .equals(“Java”);
2. B. boolean b = cs.stream() .anyMatch (w -> w.equals (“Java”));
3. C. boolean b = cs.stream() .findFirst() .get() .equals(“Java”);
4. D. boolean b = cs.stream() .allMatch(w -> w.equals(“Java”));

Correct Answer: C

and the code fragment?

What is the result?

1. A. $15.00
2. B. 15 $
3. C. USD 15.00
4. D. USD $15

Correct Answer: A

Given the code fragment:

What is the result?

1. A. A compilation error occurs at line n1.
2. B. Checking…
3. C. Checking… Checking…
4. D. A compilation error occurs at line n2.

Correct Answer: A