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Q51. Given: 

public class SampleClass { 

public static void main(String[] args) { 

AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new 

SampleClass(); 

sc = asc; 

System.out.println("sc: " + sc.getClass()); 

System.out.println("asc: " + asc.getClass()); 

}} 

class AnotherSampleClass extends SampleClass { 

What is the result? 

A. sc: class Object asc: class AnotherSampleClass 

B. sc: class SampleClass asc: class AnotherSampleClass 

C. sc: class AnotherSampleClass asc: class SampleClass 

D. sc: class AnotherSampleClass asc: class AnotherSampleClass 

Answer:


Q52. Given: 

public class Test<T> { 

private T t; 

public T get () { 

return t; 

public void set (T t) { 

this.t = t; 

public static void main (String args [ ] ) { 

Test<String> type = new Test<>(); 

Test type 1 = new Test ();//line n1 

type.set(“Java”); 

type1.set(100);//line n2 

System.out.print(type.get() + “ “ + type1.get()); 

What is the result? 

A. Java 100 

B. java.lang.string@<hashcode>java.lang.Integer@<hashcode> 

C. A compilation error occurs. To rectify it, replace line n1 with: Test<Integer> type1 = new Test<>(); 

D. A compilation error occurs. To rectify it, replace line n2 with: type1.set (Integer(100)); 

Answer:


Q53. Given the code fragment: 

9. 

Connection conn = DriveManager.getConnection(dbURL, userName, passWord); 

10. 

String query = “SELECT id FROM Employee”; 

11. 

try (Statement stmt = conn.createStatement()) { 

12. 

ResultSet rs = stmt.executeQuery(query); 13.stmt.executeQuery(“SELECT id FROM Customer”); 

14. 

while (rs.next()) { 

15. 

//process the results 16.System.out.println(“Employee ID: “+ rs.getInt(“id”)); 17.} 

18. 

} catch (Exception e) { 

19. 

System.out.println (“Error”); 

20. 

Assume that: 

The required database driver is configured in the classpath. 

The appropriate database is accessible with the dbURL, userName, and passWord exists. 

The Employee and Customer tables are available and each table has id column with a few 

records and the SQL queries are valid. 

What is the result of compiling and executing this code fragment? 

A. The program prints employee IDs. 

B. The program prints customer IDs. 

C. The program prints Error. 

D. compilation fails on line 13. 

Answer:


Q54. Given: 

What is the result? 

A. 6 7 8 

B. 7 8 9 

C. 0 1 2 

D. 6 8 10 

E. Compilation fails 

Answer:


Q55. Given the code fragments: 

interface CourseFilter extends Predicate<String> { 

public default boolean test (String str) { 

return str.equals (“Java”); 

and 

List<String> strs = Arrays.asList(“Java”, “Java EE”, “Java ME”); 

Predicate<String> cf1 = s - > s.length() > 3; 

Predicate cf2 = new CourseFilter() { //line n1 

public boolean test (String s) { 

return s.contains (“Java”); 

}; 

long c = strs.stream() 

.filter(cf1) 

.filter(cf2//line n2 

.count(); 

System.out.println(c); 

What is the result? 

A. 2 

B. 3 

C. A compilation error occurs at line n1. 

D. A compilation error occurs at line n2. 

Answer:


Q56. Given the code fragment: 

List<Integer> values = Arrays.asList (1, 2, 3); 

values.stream () 

.map(n -> n*2)//line n1 

.peek(System.out::print)//line n2 

.count(); 

What is the result? 

A. 246 

B. The code produces no output. 

C. A compilation error occurs at line n1. 

D. A compilation error occurs at line n2. 

Answer:


Q57. Given: 

Item table 

. ID, INTEGER: PK 

. DESCRIP, VARCHAR(100) 

. PRICE, REAL 

. QUANTITY< INTEGER 

And given the code fragment: 

9. try { 

10.Connection conn = DriveManager.getConnection(dbURL, username, password); 

11. 

String query = “Select * FROM Item WHERE ID = 110”; 

12. 

Statement stmt = conn.createStatement(); 

13. 

ResultSet rs = stmt.executeQuery(query); 

14.while(rs.next()) { 

15.System.out.println(“ID:“ + rs.getInt(“Id”)); 

16.System.out.println(“Description:“ + rs.getString(“Descrip”)); 

17.System.out.println(“Price:“ + rs.getDouble(“Price”)); 

18. System.out.println(Quantity:“ + rs.getInt(“Quantity”)); 

19.} 

20. 

} catch (SQLException se) { 

21. 

System.out.println(“Error”); 

22. 

Assume that: 

The required database driver is configured in the classpath. 

The appropriate database is accessible with the dbURL, userName, and passWord exists. 

The SQL query is valid. 

What is the result? 

A. An exception is thrown at runtime. 

B. Compilation fails. 

C. The code prints Error. 

D. The code prints information about Item 110. 

Answer:


Q58. Given: 

class RateOfInterest { 

public static void main (String[] args) { 

int rateOfInterest = 0; 

String accountType = “LOAN”; 

switch (accountType) { 

case “RD”; 

rateOfInterest = 5; 

break; 

case “FD”; 

rateOfInterest = 10; 

break; 

default: assert false: “No interest for this account”; //line n1 } System.out.println (“Rate of interest:” + rateOfInterest); } } 

and the command: 

java –ea RateOfInterest 

What is the result? 

A. Rate of interest: 0 

B. An AssertionError is thrown. 

C. No interest for this account 

D. A compilation error occurs at line n1. 

Answer:


Q59. 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? 

A. ur :: va 

B. ueJa 

C. The program prints nothing. 

D. A compilation error occurs at line n1. 

Answer:


Q60. The protected modifier on a Field declaration within a public class means that the field ______________. 

A. Cannot be modified 

B. Can be read but not written from outside the class 

C. Can be read and written from this class and its subclasses only within the same package 

D. Can be read and written from this class and its subclasses defined in any package 

Answer:

Reference: 

http://beginnersbook.com/2013/05/java-access-modifiers/