### Question:
JobUtil { public static String getAndReplaceHolders(String str) { if (str != null) { String[] props = JobUtil.getPlaceHolders(str); return replaceHolders(str, props); } return null; } private  JobUtil(); static String[] getPlaceHolders(String str); static int[] getPlaceHolder(String str, int start); static String replaceHolder(String str, String prop); static String getAndReplaceHolders(String str); static String replaceHolders(String str, String[] props); static String[] getAndReplaceHolders(String[] strArray); static boolean validateIPAddress(String address); static boolean validateFileSystemLocation(String address); static void enableProfiler(Job job, String params); static void disableProfiler(Job job); static void addClassPath(final Job job, String jars, String resources); static void addClassPath(final JobConf job, String jars,
			String resources); static void modifyOutputPath(Job job); static void modifyOutputPath(JobConf conf); static void modifyInputPath(Job job, String sampledDataPath); static void modifyInputPath(JobConf conf, String sampledDataPath);  }### Answer:
@Test public void testGetAndReplacereplaceHolder() { String[] strArray = new String[] { UtilitiesConstantsTestInterface.REGEX, UtilitiesConstantsTestInterface.REG }; String[] array = JobUtil.getAndReplaceHolders(strArray); assertTrue(array != null); }