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Q51. Given a java source file:
What changes will make this code compile? (Select Two)
A. Adding the public modifier to the declaration of class x
B. Adding the protected modifier to the x() constructor
C. Changing the private modifier on the declaration of the one() method to protected
D. Removing the Y () constructor
E. Removing the private modifier from the two () method
Answer: CE
Q52. Which two will compile, and can be run successfully using the command:
Java fred1 hello walls
A. Option A
B. Option B
C. Option C
D. Option D
Answer: CD
Q53. Given the code fragment:
Q54. Given the code fragment:
nt a = 0;
a++;
System.out.printIn(a++);
System.out.printIn(a);
What is the result?
A. 1 2
B. 0 1
C. 1 1
D. 2 2
Answer: A
Q55. which three lines are illegal?
A. line 3
B. line 4
C. line 5
D. line 6
E. line 10
F. line 11
G. line 12
H. line 13
Answer: CDH
Q56. Given:
What is the result?
A. 10 : 22 : 20
B. 10 : 22 : 22
C. 10 : 22 : 6
D. 10 : 30 : 6
Answer: B
Q57. Given:
What is the result?
A. 7
B. 12
C. 19
D. Compilation fails
E. An exception is thrown at run time
Answer: B
Q58. The protected modifier on a Field declaration within a public class means that the field
______________.
A. Cannot be modified
B. Can be read but not written from outside the class
C. Can be read and written from this class and its subclasses only within the same
package
D. Can be read and written from this class and its subclasses defined in any package
Answer: D
Q59. Given the code fragment:
String name = "Spot";
int age = 4;
String str ="My dog " + name + " is " + age;
System.out.println(str);
And
StringBuilder sb = new StringBuilder();
Using StringBuilder, which code fragment is the best potion to build and print the following
string My dog Spot is 4
A. sb.append("My dog " + name + " is " + age); System.out.println(sb);
B. sb.insert("My dog ").append( name + " is " + age); System.out.println(sb);
C. sb.insert("My dog ").insert( name ).insert(" is " ).insert(age); System.out.println(sb);
D. sb.append("My dog ").append( name ).append(" is " ).append(age);
System.out.println(sb);
Answer: AD
Q60. Given:
Which two code fragments are valid?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Answer: BC