Place the correct description of the compiler output on the code fragments to be inserted at lines 4 and 5 The same compiler output may be used more than once
1. import java.util.*; 2. public class X { 3. public static void main(String[] args) { 4 . /* insert, code here*/ 5. /* insert code here */ 6. } 7. public static void foo(List < Object > list) { 8. } }

Code Compiler Output

1 . ArrayList < Strinq > x1 = new ArrayList < String > ( ); foo(x1); A) Compilation Succeeds

2. ArrayList < Object > x2 = new ArrayList < String > ( ); foo(x2); B) Compilation fails due to an error in the first statement.

3. ArrayList < Object > x3 = new ArrayList < Object > ( ); foo(x3); C) Compilation of the first statement succeeds. but compilation fails due to an error in the second statement;

4. ArrayList x4 = new ArrayList ( ); foo(x4);

Question

Place the correct description of the compiler output on the code fragments to be inserted at lines 4 and 5 The same compiler output may be used more than once

1. import java.util.*; 
2. public class X { 
3. public static void main(String[] args) { 
4 . /* insert, code here*/ 
5. /* insert code here */ 
6. } 
7. public static void foo(List < Object > list) { 
8. }  
}

Code	Compiler Output
1 . `ArrayList < Strinq > x1 = new ArrayList < String > ( ); foo(x1);`	A) Compilation Succeeds
2. `ArrayList < Object > x2 = new ArrayList < String > ( ); foo(x2);`	B) Compilation fails due to an error in the first statement.
3. `ArrayList < Object > x3 = new ArrayList < Object > ( ); foo(x3);`	C) Compilation of the first statement succeeds. but compilation fails due to an error in the second statement;
4. `ArrayList x4 = new ArrayList ( ); foo(x4);`

Examsnet · Accepted Answer

Correct Answer is : 1-C, 2-B, 3-A, 4-A

Collections and Generics