Oracle 1Z0-819 問題集

質問 1：
Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:

Which statement inserted on line 14 sets NAME column to a NULL value?
A. Stmt.setNull(2 string, class);
B. Stmt.setNull(2, java,sql. Types, VARCHAR);
C. Stmt.setNull(2, java.lang, string);
D. Stmt.setNull(2, null);
正解：B

質問 2：
Which set of commands is necessary to create and run a custom runtime image from Java source files?
A. javac, jlink
B. java, jdeps
C. javac, jar
D. jar, jlink
正解：A

質問 3：
Given:

What is the result?
A. The program prints nothing.
B. Take extra care
Take extra care
C. Take extra care
D. An exception is thrown at runtime
正解：D

質問 4：
Given:

You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?
A. Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.
B. Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.
C. Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2.
D. Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2.
正解：C

質問 5：
Given:

What is the output?
A. A compilation error is thrown.
B. Message from Copier: Attempt00
C. Message from Abstract Copier: Attempt00
D. A runtime error is thrown.
正解：A