Place the correct description of the compiler output on the code fragments to be 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

a. ArrayList < String > x1 = new ArrayList < String > (); foo(x1); (i) Compilation succeeds

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

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

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

Question

Place the correct description of the compiler output on the code fragments to be 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
a. `ArrayList < String > x1 = new ArrayList < String > (); foo(x1);`	(i) Compilation succeeds
b. `ArrayList < Object > x2 = new ArrayList < String > (); foo(x2);`	(ii) Compilation fails due to an error in the first statement
c. `ArrayList < Object > x3 = new ArrayList < Object > (); foo(x3);`	(iii) Compilation of the first statement succeeds but compilation fails due to an error in the second statement
d. `ArrayList x4 = new ArrayList(); foo(x4);`

Examsnet · Accepted Answer

Correct Answer is : a - (iii), b - (ii), c - (i), d - (i)

Collections and Generics

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