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Total 177 questions
Given:
and
and
and
What needs to change to make these classes compile and still handle all types of Interface Worker?
- A. Replace Line 3 with public void addProcess (Worker w) {.
-
B. Replace Line 1 with public class Main
extends Thread {. -
C. Replace Line 2 with private List
processes = new ArrayList<>();. - D. Replace Line 3 with public void addProcess(T w) {.
Answer : D
Given:
What is the output?
- A. Short value 25
- B. The compilation fails due to an error in line 1.
- C. Byte value 25
- D. Object value 25
Answer : B
Given:
You replace the code on line 1 to use ParallelStream.
Which one is correct?
- A. The code will produce the same result.
- B. The compilation fails.
- C. A NoSuchElementException is thrown at run time.
- D. The code may produce a different result.
Answer : D
Given:
You want to implement the java.io.Serializable interface to the MyPersistenceData class.
Which method should be overridden?
- A. the readExternal method
- B. nothing
- C. the readExternal and writeExternal method
- D. the writeExternal method
Answer : C
Given:
and
and
Which three are correct? (Choose three.)
- A. f2.foo(li) prints Hola Mundo!
- B. b1.foo(li) prints Bonjour le monde!
- C. b1.foo(li) prints Hello world!
- D. f1.foo(li) prints Bonjour le monde!
- E. f2.foo(li) prints Hello world!
- F. f2.foo(li) prints Bonjour le monde!
- G. f1.foo(li) prints Hola Mundo!
- H. b1.foo(li) prints Hola Mundo!
- I. f1.foo(li) prints Hello world!
Answer : A, C, I
Given the code fragment:
What is the result?
- A. 10
- B. 1
- C. The compilation fails at line 9.
- D. The compilation fails at line 16.
- E. The compilation fails at line 13.
Answer : E
Given this enum declaration:
Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?
- A. static String getFirstLetter() { return Alphabet.values()[1].toString();
- B. static String getFirstLetter() { return A.toString(); }
- C. final String getFirstLetter() { return A.toString(); }
- D. String getFirstLetter() { return A.toString(); }
Answer : D
Given the declaration:
@inteface Resource {
String[] value();
}
Examine this code fragment:
/* Loc1 */ class ProcessOrders { ... }
Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)
- A. @Resource({“Customer1”, “Customer2”})
- B. @Resource(value={{}})
- C. @Resource
- D. @Resource(“Customer1”)
- E. @Resource()
Answer : AD
Given:
public interface Builder {
public A build(String str);
}
and
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. A cannot be abstract.
- B. A cannot be final.
- C. B cannot be abstract.
- D. B cannot be final.
- E. B is a subtype of A.
- F. A is a subtype of B.
Answer : ABD
Given:
What is the output?
- A. 1 2 [1, 2, 3, four] 3 four
- B. 1 2 [1, 2, 3, 4] 3 4
- C. 1 2 [1, 2, 3, 4] 3 four
- D. 1 2 [1, 2, 3, four] 3 4
Answer : B
Given the code fragment:
Which can replace line 2?
-
A. UnaryOperator
u = (int i) -> i * 2; -
B. UnaryOperator
u = (var i) -> (i * 2); -
C. UnaryOperator
u = var i -> { return i * 2; }; -
D. UnaryOperator
u = i -> { return i * 2);
Answer : B
Given the content from lines.txt:
C -
C++
Java -
Go -
Kotlin -
and
What is the result?
-
A. C
C++
Go
Kotlin - B. JAVA
-
C. C
C++
GO
KOTLIN -
D. C
C++
JAVA
GO
KOTLIN
Answer : D
Given:
What is the result?
- A. 1 2 followed by an exception
- B. 1 2 4 5
- C. A ConcurrentModificationException is thrown at run time.
- D. 1 2 3 followed by an exception
Answer : C
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