Java SE 17 Developer52 questions across 6 pages are complete and free, with no account or card.
52 questions in this bank
Free access · progress saved on this device
Given the code fragment:
What is the result?
Answer: D
Print 777. a.replace("Hello!", "Welcome!") doesn’t change a. It creates a new string which is not used. Therefore, a.indexOf("Java") will return the same index (7) both times. The same index will be returned by b.indexOf("Java") since b is created from a.
Source: Adapted from community discussion — testostaws
Which statement is true?
Answer: D
Given:
What is the result?
Answer: A
Given the code fragment:
What is the result?
Answer: D
Given the code fragment: List<Integer> listOfNumbers = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); Which code fragment returns different values?
Answer: D
// D. int sum = listOfNumbers.parallelStream().reduce(5, Integer::sum); // (1 + 5) + (2 + 5) + (3 + 5) + (4 + 5) + (5 + 5) + (6 + 5) + (7 + 5) + (8 + 5) + (9 + 5) + (10 + 5) = 105 System.out.println(">>> sum = " + sum); // >>> sum = 105 A, B, C, E return sum = 60.
Source: Adapted from community discussion — james2033
Given:
What is the result?
Answer: C
package q23; public class App { public int x = 100; public static void main(String[] args) { int x = 1000; App t = new App(); t.myMethod(x); System.out.println(x); } public void myMethod(int x) { x++; System.out.println(x); System.out.println(this.x); } } // Result: // 1001 // 100 // 1000
Source: Adapted from community discussion — james2033
Given the code fragment:
What is the result?
Answer: A
package q24; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Q24 { public static void main(String[] args) { List lst = new ArrayList(); lst.add("e1"); lst.add("e3"); lst.add("e2"); int x1 = Collections.binarySearch(lst, "e3"); System.out.println(x1); Collections.sort(lst); int x2 = Collections.binarySearch(lst, "e3"); System.out.println(x2); Collections.reverse(lst); int x3 = Collections.binarySearch(lst, "e3"); System.out.println(x3); } } // Result: // 1 // 2 // -4
Source: Adapted from community discussion — james2033
Given the code fragment:
Which two statements at Line n1 independently enable you to print 1250? (Choose two.)
Answer: CD
package q25; public class Q25 { public static void main(String[] args) { String s = "10_00"; Integer s2 = 10_00; // Line n1 // A. // Integer res = 250 + Integer.parseInt(s); // parseInt exception. // B. // Integer res = 250 + Integer.valueOf(s); // parseInt exception. // C. // Integer res = 250 + s2; // at the end, result = 1250 . // D. Integer res = 250; res += s2; // At then end, result = 1250 . // E. // Integer res = 250 + s; // Syntax error. // F. // Integer res = 250 + Integer(s2); // Syntax error. System.out.println(res); } }
Source: Adapted from community discussion — james2033
Given the code fragment:
What is the result?
Answer: A
package q26; public class Q26 { public static void main(String[] args) { int a = 2; int b = ~a; int c = a ^ b; boolean d = a c++; System.out.println(d + " " + c); boolean e = a > b && a > c++; System.out.println(e + " " + c); } } // Result: // false 0 // true 1
Source: Adapted from community discussion — james2033
Assume you have an automatic module from the module path display-ascii-0.2.jar. Which name is given to the automatic module based on the given JAR file?
Answer: C
The correct answer is C. After removal of .jar, the version number '0.2', and trailing special character '-' The remaining special characters in between letters is replaced with a dot(.) Thus the automatic name will be 'display.ascii'
Source: Adapted from community discussion — zuluitai
Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page
1Z0-829 practice, question 11. 52 questions available.
Version 1.0.0. How we source questions