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Given:
Which code fragment should you use at line n1 to instantiate the dvd object successfully?
Answer: C
C is the correct answer. --- A is incorrect as there is no default constructor available in CD class. B is incorrect as you cannot have two constructor calls D is incorrect as call to super must be first line of constructor
Source: Adapted from community discussion — Stewart125
Given:
What is the result?
Answer: E
Given the code fragment:
What is the result?
Answer: A
Answer is A: import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class Test { static int a1; public static void doProduct(Integer a){ a1 = a * a; } public static void doString(StringBuilder s) { s.append(" " + s); } public static void main(String[] args) { String [] arr = {"Hi", "How", "Are", "You"}; List arrList = new ArrayList<>(Arrays.asList(arr)); if (arrList.removeIf((String s) -> {return s.length() <= 2;})) { System.out.println(s + "removed"); } } }
Source: Adapted from community discussion — Tarik2190
Given:
What is the result?
Answer: E
Answer is E: class Student{ String name; public Student(String name) { this.name = name; } } public class Test { public static void main(String[] args) { Student[] students = new Student[3]; students[1] = new Student("Richard"); students[2] = new Student("Donald"); for (Student s : students){ System.out.println("" + s.name); } } }
Source: Adapted from community discussion — Tarik2190
This grid shows the state of a 2D array:
The grid is created with this code:
Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive XS?
Answer: A
The correct answer is A. The answer D will return an exception because there is no way to access the 3rd place. Always remember that Java indexes from 0, to make a complete line of X we need to put an X in the second place from the third line and I say again, as java indexes from 0, so it is grid[2][1] = 'X';
Source: Adapted from community discussion — iSnover
Given:
What is the result?
Answer: C
The right answer is the letter C, because when we put "var++" the addition is done when leaving the condition or the line, but when we put "++var" the addition is done on the spot so 1 is not greater than 1, printing " Welcome" which is in Else and in the last line printing the XY with the additions made getting 2:1.
Source: Adapted from community discussion — iSnover
Given the code snippet from a compiled Java source file:
Which command-line arguments should you pass to the program to obtain the following output? Arg is 2 -
Answer: A
Given the code fragment:
Which two modifications should you make so that the code compiles successfully? (Choose two.)
Answer: CE
The answer is CE, no comments, putting this in the class/method will make it compile normally. In relation to the OCA, in this type of question you have to go with the most obvious.
Source: Adapted from community discussion — iSnover
Given the code fragment:
What is the result?
Answer: B
The right answer is B, in the for each the var "arr" has a value of 2, therefore the for inside it will receive the same value, that is, it will only get the 2 values of each line, printing 1 3 1 3. OBS: Always remember that Java indexes from 0.
Source: Adapted from community discussion — iSnover
Given: MainTest.java:
and commands:
What is the result?
Answer: C
The answer is letter C, prints String main 1 2 3. When we pass something in the argument at the time of execution between " " we are saying that everything that is between quotes will occupy a single space in the array that in the case of "1 2 3" as it is on the command line it is at position 0 of the args array.
Source: Adapted from community discussion — iSnover
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