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Q1. Given:
What is the result?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q2. Given the code format:
Which code fragment must be inserted at line 6 to enable the code to compile?
A. DBConfiguration f; return f;
B. Return DBConfiguration;
C. Return new DBConfiguration;
D. Retutn 0;
Answer: B
Q3. Given the code fragment:
What is the result?
A. [Robb, Rick, Bran]
B. [Robb, Rick]
C. [Robb, Bran, Rick, Bran]
D. An exception is thrown at runtime.
Answer: A
Q4. Given:
interface Pet { }
class Dog implements Pet { }
public class Beagle extends Dog{ }
Which three are valid?
A. Pet a = new Dog();
B. Pet b = new Pet();
C. Dog f = new Pet();
D. Dog d = new Beagle();
E. Pet e = new Beagle();
F. Beagle c = new Dog();
Answer: A,D,E
Explanation:
Incorrect:
Not B, not C: Pet is abstact, cannot be instantiated.
Not F: incompatible type. Required Beagle, found Dog.
Q5. Which two statements are true for a two-dimensional array?
A. It is implemented as an array of the specified element type.
B. Using a row by column convention, each row of a two-dimensional array must be of the same size.
C. At declaration time, the number of elements of the array in each dimension must be specified.
D. All methods of the class Object may be invoked on the two-dimensional array.
Answer: A,D
Q6. Given the code fragment:
What is the result?
A. 10 8 6 4 2 0
B. 10 8 6 4 2
C. AnArithmeticException is thrown at runtime
D. The program goes into an infinite loop outputting: 10 8 6 4 2 0. . .
E. Compilation fails
Answer: B
Q7. Given the fragment:
What is the result?
A. 13480.0
B. 13480.02
C. Compilation fails
D. An exception is thrown at runtime
Answer: A
Q8. Given:
Which code fragment, when inserted at line 7, enables the code print true?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q9. Given:
What is the result?
A. Shining Sun Shining Sun Shining Sun
B. Shining Sun Twinkling Star Shining Sun
C. Compilation fails
D. A ClassCastException is thrown at runtime
Answer: D
Q10. Given the code fragment:
What is the result?
A. Element 0 Element 1
B. Null element 0 Null element 1
C. Null Null
D. A NullPointerException is thrown at runtime.
Answer: D