多选题Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object?()AWhen using versions of Java technology earlier than 5.0.BWhen sharing a StringBuffer among multiple threads.CWhen using the java.io class StringBufferInput...
Thursday, November 16, 2023
单选题Given a valid DateFormat object named df,and 16.Date d = new Date(0L); 17.String ds = "December 15, 2004"; 18.//insert code here What updates d’s value with the date represented by ds?()A 18. d = df.parse(ds);B 18. d = df.getDate(ds);C 18. try {19. d =...
Sunday, March 17, 2024
多选题Given a class whose instances, when found in a collection of objects, are sorted by using the compare To method, which two statements are true?()AThe class implements java.lang.Comparable.BThe class implements java.util.Comparator.CThe interface used t...
Wednesday, April 24, 2024
单选题Given: 12.Date date = new Date(); 13.df.setLocale(Locale.ITALY); 14.String s = df.format(date); The variable df is an object of type DateFormat that has been initialized in line 11. What is the result if this code is run on December 14, 2000?()A The va...
Saturday, April 27, 2024
单选题Given: 12.String csv = "Sue,5,true,3"; 13.Scanner scanner = new Scanner( csv ); 14.scanner.useDelimiter(",");15. int age = scanner.nextInt(); What is the result?()A Compilation fails.B After line 15, the value of age is 5.C After line 15, the value of ...
多选题Given: Which three are true?()ACat is-a AnimalBCat is-a JumperCDog is-a AnimalDDog is-a JumperECat has-a AnimalFBeagle has-a Tail...
Saturday, December 30, 2023
单选题Which Man clsss properly represents the relationship "Man has a best friend who is a Dog"?()A class Man extends Dog { }B class Man implements Dog { }C class Man { private BestFriend dog; }D class Man { private Dog bestFriend; }E class Man { private Dog...
单选题Given: What is the result?()A [1, 2, 3, 5]B [2, 1, 3, 5]C [2, 5, 3, 1]D [5, 3, 2, 1]E [1, 3, 5, 2]...
Sunday, February 18, 2024
单选题Click the Exhibit button. Given this code from Class B: 25.A a1 = new A(); 26.A a2 = new A(); 27.A a3 = new A(); 28.System.out.println(A.getInstanceCount()); What is the result?()A Compilation of class A fails.B Line 28 prints the value 3 to System....
单选题Given: What is the result?()A TestAB TestBC Compilation fails.D An exception is thrown at runtime....
Friday, May 10, 2024
多选题Given: And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." (current directory). Which two java commands entered at the commandline will run MainClass?()Ajava MainClass if run fro...
单选题Click the Exhibit button. What is the result?()A Compilation of class A fails.B Line 28 prints the value 3 to System.out.C Line 28 prints the value 1 to System.out.D A runtime error occurs when line 25 executes.E Compilation fails because of an e...
单选题A UNIX user named Bob wants to replace his chess program with a new one, but he is not sure where theold one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using thecommand: java -classpath /...
多选题A developer is creating a class Book, that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three, taken independently, will allow the developer to use the Paper class while compiling the Bookclass?()AThe JAR fi...
单选题Given: What is the result?()A Compilation succeeds.B Compilation fails due to multiple errors.C Compilation fails due to an error only on line 20.D Compilation fails due to an error only on line 21.E Compilation fails due to an error only on line...
单选题Given: What is the result?()A BB The code runs with no output.C Compilation fails because of an error in line 12.D Compilation fails because of an error in line 15.E Compilation fails because of an error in line 18....
单选题Given: 1.package test; 2. 3.class Target { 4.public String name = "hello";5.} What can directly access and change the value of the variable name?()A any classB only the Target classC any class in the test packageD any class that extends Target...
单选题Given that the elements of a PriorityQueue are ordered according to natural ordering,and: What is the result?()A apple pearB banana pearC apple appleD apple bananaE banana banana...
单选题Given: What is the result?()A X, followed by an Exception.B No output, and an Exception is thrown.C Compilation fails due to an error on line 14.D Compilation fails due to an error on line 16.E Compilation fails due to an error on line 17....
单选题Given: 11.String test = "This is a test"; 12.String[] tokens = test.split("/s"); 13.System.out.println(tokens.length); What is the result?()A 0B 1C 4D Compilation fails....