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Given:
What is the result?
Answer: C
You're wrong. I took the test last week and some of this questions were on the test. Remember, test questions are not the same for everyone. They keep changing questions every time you take the test, but concept is the same. Don't memorize these questions, but try to understand them. Only then you'll pass. Good luck!
Source: Adapted from community discussion — Harid
Given the code fragment:
What is the result?
Answer: A
sb.toString() => converts it into String. and thereafter, using equals() method on String will do the value comparison. So, answer is A since the values are equal.
Source: Adapted from community discussion — Ankit1010
Given:
What is the result?
Answer: B
Correct answer is B. A static method can only reference other static methods and static fields. Count is non static and therefore produces "error: non-static variable count cannot be referenced from a static context" I initially thought App.displayMessage() was the issue because an app object hadn't been instantiated. However here app is not an object but rather a class reference to a static method. Static fields do not need an object of that class in order to be used. This error could also be fixed by making displayMessage non static and creating an app object to reference the method from in main public class App { int count; public static void displayMessage() { count++; System.out.println("Welcome. Visit count: " + count); } public static void main(String[] args) { App.displayMessage(); App.displayMessage(); } }
Source: Adapted from community discussion — eilla
Given the code fragment:
What is the result?
Answer: B
Answer is B. To test: class Person { String name; int age = 25; Person (String name) { // line 1 setName(name); } public Person (String name, int age) { Person(name); // line 2 setAge(age); } // setter and getter methods go here public void setName (String name) { this.name = name; } public void setAge (int age) { this.age = age; } public String show() { return name + " " + age; } } public class Teste { public static void main(String[] args) { Person p1 = new Person("Jesse"); Person p2 = new Person("Walter",52); System.out.println(p1.show()); System.out.println(p2.show()); } }
Source: Adapted from community discussion — carloswork
Given the code fragment:
What is the result?
Answer: B
Answer is B. To test: public class Test { static int count = 0; int i = 0; public void changeCount() { while(i<5) { i++; count++; } } public static void main (String [] args) { Test check1 = new Test (); Test check2 = new Test (); check1.changeCount(); check2.changeCount(); System.out.print(check1.count + " : " + check2.count); } }
Source: Adapted from community discussion — carloswork
Given the code fragment:
What is the result?
Answer: E
The right answer is the letter E, because the number 1 is added in the second line of the list, but the list indexes from 0, so the 1 is in position zero and the removal done in line 7 removes the data in position 1 of the list which is 2. Remembering that you cannot give the NullPointer exception because lists can print null if it is inserted in one of the positions of the list, it would only give NullPointer exception if the list was empty. If you have any doubts, I'll also test the code, feel free: public static void main(String[] args) { ArrayList points = new ArrayList<>(); points.add(1); points.add(2); points.add(3); points.add(4); points.add(null); points.remove(1); points.remove(null); System.out.println(points); }
Source: Adapted from community discussion — iSnover
Given:
What is the result?
Answer: B
The correct one is B, because a new reference is given to the numbers list, which overwrites the old one and 30 is added to position 2 and 40 to position 3 of the list, as it was reset, position 0 and 1 had no numbers, so they won the value of 0 because when an int has no reference to a number, 0 is given for the pattern, so when printing the list it outputs "0 0 30 40"
Source: Adapted from community discussion — iSnover
Which two code fragments cause a compilation error? (Choose two.)
Answer: CD
The answer is C and D. A. float flt = 100.00F; // correct B. float flt = (float) 1_11.00; // correct C. Float flt = 100.00; // assigning a double to Float object without explicit cast D. double y1 = 203.22; float flt = y1; // assigning a double to a float without explicit cast E. int y2 = 100; float flt = (float) y2 ; // correct
Source: Adapted from community discussion — anastacia
Which three statements are true about exception handling? (Choose three.)
Answer: CEF
The answer is C, E, F. All exceptions are recoverable but errors are not and RuntimeException classes do not need to be declared.
Source: Adapted from community discussion — iSnover
Given the code fragment:
What is the result?
Answer: C
The correct answer is the letter C, String is immutable, that is, it is necessary to create a new variable, in the line "myStr.trim();" as no variables are assigned, the line is almost forgotten because it compiles. As java indexes from 0 it prints 5 which is the C answer.
Source: Adapted from community discussion — iSnover
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