Examples of java se 7 programmer i 1z0 803

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Q41. An unchecked exception occurs in a method dosomething() Should other code be added in the dosomething() method for it to compile and execute? 

A. The Exception must be caught 

B. The Exception must be declared to be thrown. 

C. The Exception must be caught or declared to be thrown. 

D. No other code needs to be added. 

Answer:

Q42. A method doSomething () that has no exception handling code is modified to trail a method that throws a checked exception. Which two modifications, made independently, will allow the program to compile? 

A. Catch the exception in the method doSomething(). 

B. Declare the exception to be thrown in the doSomething() method signature. 

C. Cast the exception to a RunTimeException in the doSomething() method. 

D. Catch the exception in the method that calls doSomething(). 

Answer: AB 

Q43. Given the code in a file Traveler.java: 

And the commands: 

Javac Traveler.java 

Java Traveler Java Duke 

What is the result? 

A. Happy Journey! Duke 

B. Happy Journey! Java 

C. An exception is thrown at runtime 

What is the result? 

D. The program fails to execute due to a runtime error 

Answer:

Q44. 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:

Q45. Given: 

What is the result? 

A. Compilation fails 

B. An exception is thrown at runtime 

C. There is no result because this is not correct way to determine the hash code 

D. Hash is: 111111, 44444444, 999999999 

Answer:

Q46. 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:

Q47. Given the code fragment: 

What is the result? 

A. 10 8 6 4 2 0 

B. 10 8 6 4 2 

C. An Arithmetic Exception is thrown at runtime 

D. The program goes into an infinite loop outputting: 10 8 6 4 2 0. . . 

E. Compilation fails 

Answer:

Q48. Given: 

public class SampleClass { 

public static void main(String[] args) { 

AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new 

SampleClass(); 

sc = asc; 

System.out.println("sc: " + sc.getClass()); 

System.out.println("asc: " + asc.getClass()); 

}} 

class AnotherSampleClass extends SampleClass { 

What is the result? 

A. sc: class Object asc: class AnotherSampleClass 

B. sc: class SampleClass asc: class AnotherSampleClass 

C. sc: class AnotherSampleClass asc: class SampleClass 

D. sc: class AnotherSampleClass asc: class AnotherSampleClass 

Answer:

Q49. What is the result? 

A. 3 false 1 

B. 2 true 3 

C. 2 false 3 

D. 3 true 1 

E. 3 false 3 

F. 2 true 1 

G. 2 false 1 

Answer:

Q50. What is the result? 

A. 100 210 

B. Compilation fails due to an error in line n1 

C. Compilation fails due to an error at line n2 

D. Compilation fails due to an error at line n3 

Answer:

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