Oracle 1Z0-804 Java SE 7 Programmer II Exam

2020 Oracle Official New Released 1Z0-804 Q&As
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Q1. Which two actions can be used in registering a JDBC 3.0 driver? A. Add the driver class to the META-INF/services folder of the JAR file. B. Set the driver class name by using the jdbc.drivers system property. C. Include the JDBC driver class in a jdbcproperties file. D. Use the java.lang.class.forName method to load the driver class. E. Use the DriverManager.getDriver method to load the

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Q1. Given: What is the result? A. fast slow B. fast goes C. goes goes D. fast fast E. fast followed by an exception F. Compilation fails View AnswerAnswer: F Explanation: Line:Vehicle v = new Sportscar(); causes compilation failure: error: cannot find symbol Vehicle v = new Sportscar(); symbol: class Sportscar location: class VehicleTest Q2. Assuming the port statements are corr

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Q1. Given: What is the result? A. John Adams George Washington Thomas Jefferson B. George Washington John Adams Thomas Jefferson C. Thomas Jefferson John Adams George Washington D. An exception is thrown at runtime E. Compilation fails View AnswerAnswer: B Explanation: The program compiles and runs fine. At runtime the NameList is built and then sorted by natural Order (String >>

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Q1. Given that myFile.txt contains: What is the result? A. 1: First 2: Second 3: Third B. 1: First 2: Second 3: First C. 1: First 2: First 3: First D. IOExcepton E. Compilation fails View AnswerAnswer: B Explanation: BufferedReader: mark() : Marks the present position in the stream. Subsequent calls to reset() will attempt toreposition the stream to this point. reset() :

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Q1. Given the code fragment: Why is there no output when otherMethod is called? A. An exception other than IOException is thrown. B. Standard error is not mapped to the console. C. There is a compilation error. D. The exception is suppressed. View AnswerAnswer: C Explanation: C: wenn printStackTrace() ohne Referenz auf das Exception object aufgerufen A : w

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Q1. Given: What is the result? A. Compilation fails at line 9 B. Compilation fails at line 10 C. Compilation fails at line 5 D. Compilation fails at line 3 E. Compilation succeeds View AnswerAnswer: B Q2. Given the code fragment: If the file userguide.txt does not exist, what is the result? A. An empty file iscreated and success is printed B. class C. cl

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Q1. Which code fragment demonstrates the proper way to handle JDBC resources? A. try { ResultSet rs = stmt.executeQuery (query); statement stmt = con.createStatement(); while ( (/* . . . */) } catch (SQLException e) {} B. try { Statement stmt = con.createStatement(); ResultSet rs = stmt.executeQuery (query); while ( (/* . . . */) } catch (SQLException e) {} C. try {

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Q1. Which class(es) safely protects the doIt () method from concurrent thread access? A. Option A B. Option B C. Option C D. Option D View AnswerAnswer: A,D Explanation: only A und D possible It should be pointed out that: public void blah() { synchronized (this) { // do stuff }} is semantically equivalent to: public synchronized void blah() { // do stuff } Incorrect answer: B: