[2023年02月12日] 最新でリアルな1z1-811試験問題集解答 [Q29-Q53]

[2023年02月12日] 最新でリアルな1z1-811試験問題集解答

あなたを簡単に合格させる1z1-811試験問と正確なJava FoundationsのPDF問題

質問 29
What does import java.io* mean?

A. All classes in the io package are imported.
B. All classes in the io package and the subpackages of io packages, if any, are imported.
C. Only the io class is imported.
D. All classes whose names start with io are imported.

正解: B

質問 30
Given:

What is the result?

A. Iteration plus an increasing number is printed 100 times.
B. The program compiles and nothing is printed.
C. Iteration plus an increasing number is printed 99 times.
D. An error occurs during compilation.

正解: D

質問 31
Given the code fragment:

What is the result?

A. 25.67
B. 25.7
C. 25.00
D. 0

正解: A

質問 32
Given the code fragment:

What is the result?

A. 0 : 1
B. 3 : 1
C. 2 : 0
D. 3 : 2

正解: D

質問 33
Given the code fragment:

Which for loop statement can be used to print 135?

A. for(int idx = 1; idx < arr.length; idx+=2) {
System.out.print (arr[idx]);
}
B. for(int idx = 0; idx < arr.length; idx+=2) {
System.out.print (arr[idx]);
}
C. for(int idx = 1; idx < arr.length-1; idx++) {
System.out.print (arr[idx++]);
}
D. for(int idx = 0; idx < arr.length; idx++) {
System.out.print (arr[idx]);
}

正解: B

質問 34
Given:

Which statement, when inserted at line n1, enables the Course class to compile?

A. long newFee;
B. float newFee;
C. int newFee;
D. double newFee;

正解: D

質問 35
Given:

What is the output?

A. Compilation fails
B. 1 2 3 aaaa
C. 1 2 aaa
D. a

正解: D

質問 36
Given the code fragment:

Which code fragment can be inserted at line n1 to enable the code to print 0.0?

A. Ball.weight = 0.0;
B. Ball b = null;
b.weight = 0.0;
C. Ball b = new Ball(0.0);
D. Ball b = new Ball();

正解: D

質問 37
Given the code fragment:

What is the result?

A. 0
B. 1
C. 2
D. 3

正解: A

質問 38
You have a microprocessor board, such as Raspberry PI, wired to control a drone.
Which edition of Java is geared towards use of simple, closed systems with constrained memory requirements, such as a microprocessor board?

A. Java Standard Edition with a Compact Profile
B. Java SE Embedded
C. Java Micro Edition
D. Java Enterprise Edition

正解: B

質問 39
Identify three advantages of object-oriented programming.

A. code reuse
B. information sharing
C. modularity
D. information hiding
E. separation of state and behavior

正解: A,C,D

質問 40
Given:

At which line does a compilation error occur?

A. line 2
B. line 3
C. line 5
D. line 7

正解: A

質問 41
Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print Java Programming:1?

A. System.out.println(c.name + ":" + Course.count);
B. System.out.println(name + ":" + count);
C. System.out.println(Course.name + ":" + c.count);
D. System.out.println(c.name + ":" + count);

正解: A

質問 42
What is the meaning of "write once, run anywhere" in Java?

A. It is a marketing statement because Java programs must be compiled for a specific platform in order to run.
B. Java programs are designed to run only in web browsers and, thus, can run wherever there is a browser.
C. Java programs can run on any Java Virtual Machine without being recompiled.
D. Java programs, after being compiled, can run on any platform or device even without a Java Virtual Machine.

正解: C

質問 43
Identify two Java reserved words.

A. true
B. this
C. array
D. string
E. exception

正解: A,B

質問 44
Which two components can class declarations include?

A. The public modifier
B. Interfaces implemented by the class
C. A list of instance methods
D. The main method

正解: A,B

質問 45
Given the code fragment:

What is the result?

A. true
true
B. false
false
C. false
true
D. A runtime exception is thrown

正解: A

質問 46
Given the code fragment:

Which two code fragments are valid at line 2?

A. for (int count = 0; count < 5; count++) {
System.out.print(count);
}
B. import java.util.*;
public void display() {
List<Integer> nums = new ArrayList<> ();
}
C. private String name = "John";
public void display() {
System.out.print(name);
}
D. package p1;
E. {
private int num;
}