2024 Realistic 1z1-819 Dumps Latest Oracle Practice Tests Dumps
1z1-819 Dumps PDF - 1z1-819 Real Exam Questions Answers
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NEW QUESTION # 105
Given:
executed with this command:
java Main one two three
What is the output of this class?
- A. nothing
- B. 1) one2) two3) three
- C. 1) one
- D. A java.lang.ArrayIndexOutOfBoundsException is thrown.
- E. The compilation fails.
Answer: B
NEW QUESTION # 106
Given:
What action ensures successful compilation?
- A. Replace int c; with private int c;.
- B. Replace public Color(int c) with private Color(int c).
- C. Replace int c; with private final int c;.
- D. Replace enum Color with public enum Color.
- E. Replace enum Color implements Serializable with public enum Color.
Answer: B
Explanation:
NEW QUESTION # 107
Given:
You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?
- A. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- B. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- C. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- D. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
Answer: B
NEW QUESTION # 108
Given:
Which two are secure serialization of these objects? (Choose two.)
- A. Make the class abstract.
- B. Declare fields transient.
- C. Implement only readResolve to replace the instance with a serial proxy and not writeReplace.
- D. Implement only writeReplace to replace the instance with a serial proxy and not readResolve.
- E. Define the serialPersistentFields array field.
Answer: C,E
NEW QUESTION # 109
Given the code fragment:
What is the result?
- A. 2 : 3
- B. -1 : 2
- C. 3 : 0
- D. 2 : -1
Answer: D
NEW QUESTION # 110
Given:
You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: D
NEW QUESTION # 111
Why would you choose to use a peek operation instead of a forEach operation on a Stream?
- A. to process the current item and return a stream
- B. to remove an item from the beginning of the stream
- C. to process the current item and return void
- D. to remove an item from the end of the stream
Answer: A
NEW QUESTION # 112
Given:
You want to implement the java.io.Serializable interface to the MyPersistenceData class.
Which method should be overridden?
- A. nothing
- B. the writeExternal method
- C. the readExternal method
- D. the readExternal and writeExternal method
Answer: D
NEW QUESTION # 113
Given the code fragment:
public void foo(Function<Integer, String> fun) {...}
Which two compile? (Choose two.)
- A. foo( n -> n + 1 )
- B. foo( Integer::toHexString )
- C. foo( n::toHexString )
- D. foo( int n -> Integer.toHexString(n) )
- E. foo( n -> Integer.toHexString(n) )
- F. foo( n -> Integer::toHexString )
- G. foo( toHexString )
- H. foo( (int n) -> Integer.toHexString(n) )
Answer: A,E
Explanation:
Explanation/Reference:
NEW QUESTION # 114
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
- A. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
} - B. module PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
} - C. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
} - D. module PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
Answer: C
NEW QUESTION # 115
Given:
What is the result?
- A. Value of Euler = "2.71828"
- B. It throws a runtime exception.
- C. The code does not compile.
- D. Value of Euler = 2.71828
Answer: C
NEW QUESTION # 116
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Any module that requires the java.se module does not need to require the java.sql module.
- B. Any module that attempts to require the java.se module actually requires the java.sql module instead.
- C. Any module that requires the java.sql module does not need to require the java.se module.
- D. Only a module that requires the java.se module is permitted to require the java.sql module.
Answer: D
NEW QUESTION # 117
Given:
Automobile.java
Car.java
What must you do so that the code prints 4?
- A. Replace the code in line 2 with Car ob = new Car();
- B. Remove the parameter from wheels method in line 3.
- C. Add @Override annotation in line 2.
- D. Remove abstract keyword in line 1.
Answer: C
Explanation:
NEW QUESTION # 118
Given the code fragment:
What is the result?
- A. It prints 1 in the infinite loop.
- B. 01
- C. 0
- D. 1
- E. The program prints nothing.
Answer: E
NEW QUESTION # 119
Given:
Which two methods modify field values? (Choose two.)
- A. setACount
- B. setTCount
- C. setCCount
- D. setAllCounts
- E. setGCount
Answer: D,E
NEW QUESTION # 120
Given:
What is true?
- A. This should print the same result each time the program runs.
- B. This may not print the same result each time the program runs.
- C. A NoSuchElementExceptionis thrown at run time.
- D. The compilation fails.
Answer: B
Explanation:
NEW QUESTION # 121
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