Please read all the questions and select the correct option in the form below.
1. Given the code fragment:
public class App {
void calcBill() {
// Line n1
new Invoice().print();
}
}
Which code fragment can be inserted at Line n1 to enable the class compile?
A) private class Invoice {
void print() {System.out.println("Invoice Printed");}
}
B) public class Invoice {
void print() {System.out.println("Invoice Printed");}
}
C) class Invoice {
void print() {System.out.println("Invoice Printed");}
}
D) protected class Invoice {
void print() {System.out.println("Invoice Printed");}
}
2. Given:
public interface MyInt {
public void method1() {
System.out.println("method1");
}
public default void method2() {
System.out.println("method2");
}
public static void method3() {
System.out.println("method3");
}
public abstract void method4();
}
Which statement is true?
A) Only method4() compiles
B) Only method2() and method4() compiles.
C) Only method2(), method3(), and method4() compiles.
D) MyInt.java compiles.
3. Given the code fragment:
public static void main(String[] args) {
List courses = Arrays.asList("Java", "Oracle", "JSF", "EJB");
// Line n1
System.out.println(count);
}
Which code fragment can be inserted at Line n1 to enable the code to print 2?
A) int count = courses.stream().filter(s -> s.startsWith("J")).count();
B) long count = courses.stream().filter(s -> s.startsWith("J")).count();
C) int count = courses.filter(s -> s.startsWith("J")).stream().count();
D) long count = courses.filter(s -> s.startsWith("J")).stream().count();
3. Given the code fragment:
public static void main(String[] args) {
List courses = Arrays.asList("Java", "Oracle", "JSF", "EJB");
// Line n1
System.out.println(count);
}
Which code fragment can be inserted at Line n1 to enable the code to print 2?
A) int count = courses.stream().filter(s -> s.startsWith("J")).count();
B) long count = courses.stream().filter(s -> s.startsWith("J")).count();
C) int count = courses.filter(s -> s.startsWith("J")).stream().count();
D) long count = courses.filter(s -> s.startsWith("J")).stream().count();
4. Given the code fragment:
public class App{
public static void main(String[] args) {
String[] fruits = {"banana", "apple", "pears", "grapes"};
Arrays.sort(fruits, (a, b) -> a.compareTo(b));
for (String s : fruits) {
System.out.print(" "+s);
}
}
}
What is the result?
A) apple banana grapes pears
B) pears grapes banana apple
C) banana apple pears grapes
D) Compilation fails.
5. Given the code fragment:
LocalDate date1 = LocalDate.of(2016, Month.JANUARY, 1);
LocalDateTime date2 = LocalDateTime.of(2017, Month.JUNE, 1, 1, 1);
Period p = Period.between(date1, date2);
System.out.print(p.getYears() + ":" + p.getMonths() + ":" + p.getDays());
What is the result?
A) 1:5:0
B) 1:6:0
C) 0:0:0
D) Compilation fails.
6. Given that /report/jun.txt and report/data/jundata.txt files are accessible
and given the code fragment:
public static void main(String[] args) {
try (Stream
st1 = Files.find(Paths.get("/report"), 2, (p, a) ->
p.toString().endsWith("txt"));
Stream st2 = Files.walk(Paths.get("/report"), 2);) {
st1.forEach(s -> System.out.println("Found: " + s));
st2.filter(s -> s.toString()
.endsWith("txt"))
.forEach(s -> System.out.println("Walked: " + s));
} catch (IOException ioe) {
System.out.println("Exception");
}
}
What is the result?
A) Found: \report\data\jundata.txt
Found: \report\jun.txt
Walked: \report\data\jundata.txt
Walked: \report\jun.txt
B) Found: \report\data\jundata.txt
Found: \report\jun.txt
Walked: \report\data\jundata.txt
Walked: \report
Walked: \report\jun.txt
Walked: \report\data\
C) Found: \report\jun.txt
Walked: \report\data\jundata.txt
Walked: \report\jun.txt
D) Found: \report\jun.txt
Walked: \report
Walked: \report\jun.txt
Walked: \report\data\
Walked: \report\data\jundata.txt
7. Given the code fragment:
public static void main(String[] args) {
Stream nums = Stream.of(1, 2, 3, 4, 5);
nums.filter(n -> n % 2 == 1);
nums.forEach(p -> System.out.print(p));
}
What is the result?
A) 135
B) 12345
C) Compilation fails.
D) An exception is thrown at runtime.
8. Given the code fragment:
class MyResource1 implements Closeable {
public void close() {
System.out.print("r1 ");
}
}
class MyResource2 implements AutoCloseable {
public void close() throws IOException {
System.out.print("r2 ");
throw new IOException();
}
}
public class App2 {
public static void main(String[] args) {
try (MyResource1 r1 = new MyResource1();
MyResource2 r2 = new MyResource2();) {
System.out.print("try ");
} catch (Exception e) {
System.out.print("catch ");
for (Throwable t : e.getSuppressed()) {
System.out.println(t.getClass().getName());
}
}
}
}
What is the result?
A) try r2 r1 catch java.io.IOException
B) try r2 r1 catch
C) try r1 r2 catch
D) Compilation fails.
