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Q41. Given the code fragment:
What is the result?
A. 10 : 10
B. 5 : 5
C. 5 : 10
D. Compilation fails
Answer: A
Q42. Given:
What is the result?
A. True false
B. True null
C. Compilation fails
D. A NullPointerException is thrown at runtime
Answer: A
Q43. Given the following class declarations:
public abstract class Animal
public interface Hunter
public class Cat extends Animal implements Hunter
public class Tiger extends Cat
Which answer fails to compile?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Answer: E
Explanation: Look at the right side of the declaration ArrayLIst() rather than ArrayList
Q44. Given the code fragment:
What is the result?
A. 2 4
B. 0 2 4 6
C. 0 2 4
D. Compilation fails
Answer: C
Q45. Given:
Which code fragment should you use at line n1 to instantiate the dvd object successfully?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Q46. Given the code fragment:
What is the result?
A. Execution terminates in the first catch statement, and caught a RuntimeException is printed to the console.
B. Execution terminates In the second catch statement, and caught an Exception is printed to the console.
C. A runtime error is thrown in the thread "main".
D. Execution completes normally, and Ready to us. is printed to the console.
E. The code fails to compile because a throws keyword is required.
Answer: C
Q47. Given:
Which option enables the code to compile?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C,D
Q48. Given the code fragment:
What could expression1 and expression2 be, respectively, in order to produce output –8, 16?
A. + +a, - -b
B. + +a, b- -
C. A+ +, - - b
D. A + +, b - -
Answer: D
Q49. Given the following four Java file definitions:
// Foo.java
package facades;
public interface Foo { }
// Boo.java
package facades;
public interface Boo extends Foo { }
// Woofy.java
package org.domain
// line n1
public class Woofy implements Boo, Foo { }
// Test.java
package.org;
public class Test {
public static void main(String[] args) {
Foo obj=new Woofy();
Which set modifications enable the code to compile and run?
A. At line n1, Insert: import facades;At line n2, insert:import facades;import org.domain;
B. At line n1, Insert: import facades.*;At line n2, insert:import facades;import org.*;
C. At line n1, Insert: import facades.*;At line n2, insert:import facades.Boo;import org.*;
D. At line n1, Insert: import facades.Foo, Boo;At line n2, insert:import org.domain.Woofy;
E. At line n1, Insert: import facades.*;At line n2, insert:import facades;import org.domain.Woofy;
Answer: E
Q50. Given:
And given the code fragment:
What is the result?
A. 4W 100 Auto 4W 150 Manual
B. Null 0 Auto 4W 150 Manual
C. Compilation fails only at line n1
D. Compilation fails only at line n2
E. Compilation fails at both line n1 and line n2
Answer: E
Explanation:
On line n1 implicit call to parameterized constructor is missing and n2 this() must be the first line.