Surprising exam 1z0 808

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Q31. Given: 

package p1; 

public class Test { 

static double dvalue; 

static Test ref; 

public static void main(String[] args) { 

System.out.println(ref); 

System.out.println(dvalue); 

What is the result? 

A. p1.Test.class 

0.0 

B. <the summary address refrenced by ref> 0.000000 

C. Null 

0.0 

D. Compilation fails 

E. A NullPointerException is thrown at runtime 

Answer:

Q32. Given: 

A. a, e 

i, o 

B. a, e 

o, o 

C. e, e 

I, o 

D. e, e 

o, o 

Answer:

Q33. Given: 

Given: 

public class SuperTest { 

public static void main(String[] args) { 

statement1 

statement2 

statement3 

class Shape { 

public Shape() { 

System.out.println("Shape: constructor"); 

public void foo() { 

System.out.println("Shape: foo"); 

class Square extends Shape { 

public Square() { 

super(); 

public Square(String label) { 

System.out.println("Square: constructor"); 

public void foo() { 

super.foo(); 

public void foo(String label) { 

System.out.println("Square: foo"); 

What should statement1, statement2, and statement3, be respectively, in order to produce the result? 

Shape: constructor 

Square: foo 

Shape: foo 

A. Square square = new Square ("bar"); 

square.foo ("bar"); 

square.foo(); 

B. Square square = new Square ("bar"); 

square.foo ("bar"); 

square.foo ("bar"); 

C. Square square = new Square (); 

square.foo (); 

square.foo(bar); 

D. Square square = new Square (); 

square.foo (); 

square.foo("bar"); 

E. Square square = new Square (); 

square.foo (); 

square.foo (); 

F. Square square = new Square(); 

square.foo("bar"); 

square.foo(); 

Answer:

Q34. Given the code fragment: 

String[] cartoons = {"tom","jerry","micky","tom"}; 

int counter =0; 

if ("tom".equals(cartoons[0])) { 

counter++; 

} else if ("tom".equals(cartoons[1])) { 

counter++; 

} else if ("tom".equals(cartoons[2])) { 

counter++; 

} else if ("tom".equals(cartoons[3])) { 

counter++; 

System.out.print(counter); 

What is the result? 

A. 1 

B. 2 

C. 4 

D. 0 

Answer:

Explanation: Counter++ will be executed only once because of the else if constructs. 

Q35. Given the code fragment: 

What is the result? 

A. A B C 

B. A B C D E 

C. A B D E 

D. Compilation fails. 

Answer:

Q36. Which statement is true about Java byte code? 

A. It can run on any platform. 

B. It can run on any platform only if it was compiled for that platform. 

C. It can run on any platform that has the Java Runtime Environment. 

D. It can run on any platform that has a Java compiler. 

E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler. 

Answer:

Q37. Given: 

What is the result? 

A. 10 : 22 : 20 

B. 10 : 22 : 22 

C. 10 : 22 : 6 

D. 10 : 30 : 6 

Answer:

Q38. Given the code fragment: 

Which code fragment, when inserted at line 9, enables the code to print true? 

A. String str2 = str1; 

B. String str2 = new String (str1); 

C. String str2 = sb1. toString (); 

D. String str2 = "Duke"; 

Answer:

Q39. Given: 

What is the result? 

A. 97 98 99 100 null null null 

B. 91 98 99 100 101 102 103 

C. Compilation rails. 

D. A NullPointerException is thrown at runtime. 

E. An ArraylndexOutOfBoundsException is thrown at runtime. 

Answer:

Q40. Given: 

Which code fragment, when inserted at line 14, enables the code to print Mike Found? 

A. int f = ps.indexOf {new patient (“Mike”)}; 

B. int f = ps.indexOf (patient(“Mike”)); 

C. patient p = new Patient (“Mike”); int f = pas.indexOf(P) 

D. int f = ps.indexOf(p2); 

Answer:

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