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Q38. Given:

executed with this command:
java Main one two three
What is the output of this class?

 The compilation fails.

 1) one2) two3) three

 A java.lang.ArrayIndexOutOfBoundsException is thrown.

 1) one

 nothing

Q39. Given:

Which two independent changes will make the Main class compile? (Choose two.)

 Move the entire Student class declaration to a separate Java file, Student.java.

 Change line 2 to public Student(String classname).

 Change line 1 to public class Student {.

 Change line 3 to Student student = new Student(“Biology”);.

 Change line 1 to static class Student {.

Q40. Which statement about access modifiers is correct?

 An instance variable can be declared with the static modifier.

 A local variable can be declared with the final modifier.

 An abstract method can be declared with the private modifier.

 An inner class cannot be declared with the public modifier.

 An interface can be declared with the protected modifier.

Q41. Given:

What is the result?

 Map: 0 Keys: 0 Values: 0

 The compilation fails.

 Map: 4 Keys: 4 Values: 4

 Map: 4 Keys: 0 Values: 0

 Map: 0 Keys: 4 Values: 4

Q42. Given the code fragment:

You want to examine whether path is a directory.
Which code inserted on line 1 will accomplish this?

 BasicFileAttributes attributes = Files isDirectory (path);

 BasicFileAttributes attributes =Files.getAttribute (path, ”insdirectory”);

 BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class

 BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);

Q43. Assume ds is a DataSource and the EMP table is defined appropriately.

What does executing this code fragment do?

 inserts two rows (101, ‘SMITH’, ‘HR’) and (102, ‘JONES’, NULL)

 inserts two rows (101, ‘SMITH’, ‘HR’) and (102, ‘JONES’, ‘HR’)

 inserts one row (101, ‘SMITH’, ‘HR’)

 throws a SQLException

Q44. Given the code fragment:

What is the result?

 01

 0

 1

 The program prints nothing.

 It prints 1 in the infinite loop.

Q45. Given:

What is the result?

 [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet

 [0,0] = Red[1,0] = Black[2,0] = Blue

 java.lang.ArrayIndexOutOfBoundsException thrown

 [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet

Q46. Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

 Only a module that requires the java.se module is permitted to require the java.sql module.

 Any module that requires the java.se module does not need to require the java.sql module.

 Any module that attempts to require the java.se module actually requires the java.sql module instead.

 Any module that requires the java.sql module does not need to require the java.se module.

Q47. Given:

What is the result?

 WorkingUnknown

 Unknown

 TuesdayUnknown

 The compilation fails.

 Tuesday

 Working

Q48. Given:

What is the result?

 It throws a runtime exception.

 Value of Euler = 2.71828

 The code does not compile.

 Value of Euler = “2.71828”

Q49. Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

 .map(Employee::getLocality)
.distinct()
.count();

 map(e -> e.getLocality())
.count();

 .map(e -> e.getLocality())
.collect(Collectors.toSet())
.count();

 .filter(Employee::getLocality)
.distinct()
.count();

Q50. Given:

Which two codes, independently, can be inserted in line to 1 compile?

 Abacus aba = (int m, int n) -> { m * n };

 Abacus aba = (int e, int f) -> { return e * f; };

 Abacus aba = (a, b) -> a * b;

 Abacus aba = v, w -> x * y;

 Abacus aba = (int i, j) -> ( return i * j; };

Q51. Given:

What is the result?

 Dr. Who

 Dr. Null

 An exception is thrown at runtime.

 null

Q52. Given:

What is the result?

 42

 The compilation fails due to an error in line 4.

 17

 The compilation fails due to an error in line 3.

 The compilation fails due to an error in line 2.

 The compilation fails due to an error in line 1.

 The compilation fails due to an error in line 5.

Q53. Given the code fragment:
Path currentFile = Paths.get(“/scratch/exam/temp.txt”);
Path outputFile = Paths get(“/scratch/exam/new.txt”);
Path directory = Paths.get(“/scratch/”);
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?

 /scratch/exam/new.txt and /scratch/new.txt are deleted.

 The program throws a FileaAlreadyExistsException.

 The program throws a NoSuchFileException.

 A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.

Q54. Given:

What is the type of the local variable x?

 Character

 char

 String[ ]

 String

Q55. Given the declaration:

Examine this code fragment:
/* Loc1 */ class ProcessOrders { … }
Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)

 @Resource(priority=100)

 @Resource(priority=0)

 @Resource(name=”Customer1″, priority=100)

 @Resource(name=”Customer1″)

 @Resource

Q56. Which two statements are correct about modules in Java? (Choose two.)

 java.base exports all of the Java platforms core packages.

 module-info.java can be placed in any folder inside module-path.

 A module must be declared in module-info.java file.

 module-info.java cannot be empty.

 By default, modules can access each other as long as they run in the same folder.

Q57. Given the code fragment:

What is the result?

 23

 12

 123

 13

Q58. Given the code fragment:

You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)

 replace line 2 with public static synchronized void main(String[] args) {

 replace line 1 with private volatile int count = 0;

 replace line 3 with
synchronized(test) {
test.count++;
}

 replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();

 replace line 3 with
synchronized(test.count) {
test.count++;
}

Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164

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