Q1. Given the code fragment: 

public class Foo { 

public static void main (String [ ] args) { 

Map<Integer, String> unsortMap = new HashMap< > ( ); 

unsortMap.put (10, “z”); 

unsortMap.put (5, “b”); 

unsortMap.put (1, “d”); 

unsortMap.put (7, “e”); 

unsortMap.put (50, “j”); 

Map<Integer, String> treeMap = new TreeMap <Integer, String> (new 

Comparator<Integer> ( ) { 

@Override public int compare (Integer o1, Integer o2) {return o2.compareTo 

(o1); } } ); 

treeMap.putAll (unsortMap); 

for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) { 

System.out.print (entry.getValue () + “ “); 

} 

} 

} 

What is the result? 

A. A compilation error occurs. 

B. d b e z j 

C. j z e b d 

D. z b d e j 

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Q2. Given the code fragment: 

Stream<List<String>> iStr= Stream.of ( Arrays.asList (“1”, “John”), 

Arrays.asList (“2”, null)0; 

Stream<<String> nInSt = iStr.flatMapToInt ((x) -> x.stream ()); 

nInSt.forEach (System.out :: print); 

What is the result? 

A. 1John2null 

B. 12 

C. A NullPointerException is thrown at run time. 

D. A compilation error occurs. 

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Q3. Given the code fragments: 

class TechName { 

String techName; 

TechName (String techName) { 

this.techName=techName; 

} 

} 

and 

List<TechName> tech = Arrays.asList ( 

new TechName(“Java-“), 

new TechName(“Oracle DB-“), 

new TechName(“J2EE-“) 

); 

Stream<TechName> stre = tech.stream(); 

//line n1 

Which should be inserted at line n1 to print Java-Oracle DB-J2EE-? 

A. stre.forEach(System.out::print); 

B. stre.map(a-> a.techName).forEach(System.out::print); 

C. stre.map(a-> a).forEachOrdered(System.out::print); 

D. stre.forEachOrdered(System.out::print); 

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Q4. Given: 

public enum USCurrency { 

PENNY (1), 

NICKLE(5), 

DIME (10), 

QUARTER(25); 

private int value; 

public USCurrency(int value) { 

this.value = value; 

} 

public int getValue() {return value;} 

} 

public class Coin { 

public static void main (String[] args) { 

USCurrency usCoin =new USCurrency.DIME; 

System.out.println(usCoin.getValue()): 

} 

} 

Which two modifications enable the given code to compile? 

A. Nest the USCurrency enumeration declaration within the Coin class. 

B. Make the USCurrency enumeration constructor private. 

C. Remove the new keyword from the instantion of usCoin. 

D. Make the getter method of value as a static method. 

E. Add the final keyword in the declaration of value. 

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Q5. Which statement is true about java.time.Duration? 

A. It tracks time zones. 

B. It preserves daylight saving time. 

C. It defines time-based values. 

D. It defines date-based values. 

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Q6. 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. 

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