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  • Which of the following are legal entry point methods that can be run from the command line?
    Which of the following are legal entry point methods that can be run from the command line?
    It might seem in the beginning that option E is the best option but if you would look at it closely, you will realize that it is not the lowercase public that was used for this. The best answer is none of the above. Do remember that Java is case sensitive. The type of case that you will use will surely have an effect on whether it will work or not. If you believe that it will not work, then you can find other options available. Option A is not a good option because the main method is not public. B does not have any return type which is the same with F. Option C does not use a static method which makes it incorrect. Option D should have a main method that should be named main in order to be correct.

  • What can you do with the DBMS_LOB package?
    What can you do with the DBMS_LOB package?
    1. use the dbms_lob.fileclose procedure to close the file being accessed. -a. dbms_lob.write is used to write to internal lobs. the internal lob is stored inside the oracle server. a blob, nclob, or clob can be one of the following: an attribute of a user-defined type a column in a table a bind or host variable a pl/sql variable, parameter, or result internal lobs can take advantage of oracle features such as: concurrency mechanisms redo logging and recovery mechanisms transactions with commit or rollbacks bfilename is a built-in function that initializes a bfile column to point to an external file. use the bfilename function as part of an insert statement to initialize a bfile column by associating it with aphysical file in the server file system. you can use the update statement to change the reference target of the bfile. a bfile can be initialized to null and updated later by using the bfilename function. c. dbms_lob.fileexists function to find if the file exits on the server

  • Which of the following statements are true? 1: public class Rabbit {2: public static void main(String[] args) {3: Rabbit one = new Rabbit(); 4: Rabbit two = new Rabbit(); 5: Rabbit three =...
    Which of the following statements are true? 1: public class Rabbit {2: public static void main(String[] args) {3: Rabbit one = new Rabbit(); 4: Rabbit two = new Rabbit(); 5: Rabbit three =...
    The Rabbit object from line 3 is first eligible for garbage collection immediately following line 8. The Rabbit object from line 4 is first eligible for garbage collection immediately following line 9.B, D. The Rabbit object from line 3 has two references to it: one and three. The references are nulled out on lines 6 and 8, respectively. Option B is correct because this makes the object eligible for garbage collection after line 8. Line 7 sets the reference four to the now null one, which means it has no effect on garbage collection. The Rabbit object from line 4 only has a single reference to it: two. Option D is correct because this single reference becomes null on line 9. The Rabbit object declared on line 10 becomes eligible for garbage collection at the end of the method on line 12. Calling System.gc() has no effect on eligibility for garbage collection.

  • Which statement will successfully invoke the following function in SQL *Plus? CREATE OR REPLACE FUNCTION CALC_PLAYER_AVG (V_ID in PLAYER_BAT_STAT.PLAYER_ID%TYPE) RETURN NUMBER IS V_AVG...
    Which statement will successfully invoke the following function in SQL *Plus? CREATE OR REPLACE FUNCTION CALC_PLAYER_AVG (V_ID in PLAYER_BAT_STAT.PLAYER_ID%TYPE) RETURN NUMBER IS V_AVG...
    1. select calc_player_avg(player_id) from player_bat_stat; -b. you cant call a function in this way, in this way you can call a procedure, because function must return a value, to call a function using execute command you should declare a bind variable using the variable command then assign the value returned from the function to this variable, in the following way: sql> variable v_get_value number sql> execute :v_get_value := calc_player_avg(31) pl/sql procedure successfully completed. sql> print v_get_value v_get_value c. again this way cant be use for calling a function in pl/sql block because the function return a value and this values must be assigned to pl/sql variable or to bind variable. like this declare v_get_from_fn number; begin v_get_from := calc_player_avg(31); end; 1z0-147 / d. same as c. e. start is use to execute a script

  • What happens during the execute phase with dynamic SQL for INSERT, UPDATE, and DELETE operations?
    What happens during the execute phase with dynamic SQL for INSERT, UPDATE, and DELETE operations?
    1. the sql statement is run and the number of rows processed is returned. -all sql statements have to go through various stages. some stages may be skipped. 1 parse every sql statement must be parsed. parsing the statement includes checking the statements syntax and validating the statement, ensuring that all references to objects are correct, and ensuring that the relevant privileges to those objects exist. 2 bind after parsing, the oracle server knows the meaning of the oracle statement but still may not have enough information to execute the statement. the oracle server may need values for any bind variable in the statement. the process of obtaining these values is called binding variables. 3 execute at this point, the oracle server has all necessary information and resources, and the statement is executed. 4 fetch in the fetch stage, rows are selected and ordered (if requested by the query), and each successive fetch retrieves another row of the result, until the last row has been fetched. you can fetch queries, but not the dml statements.

  • What happens when procedure A is invoked at 1 P.M? Local procedure A calls remote procedure B. Procedure B was compiled at 8 A.M. Procedure A was modified and recompiled at 9 A.M. Remote...
    What happens when procedure A is invoked at 1 P.M? Local procedure A calls remote procedure B. Procedure B was compiled at 8 A.M. Procedure A was modified and recompiled at 9 A.M. Remote...
    1. procedure a is invalidated and recompiles for the second time it is invoked-when the local procedure is invoked, at run time the oracle server compares the two time stamps of the referenced remote procedure. if the time stamps are equal (indicating that the remote procedure has not recompiled), the oracle server executes the local procedure. if the time stamps are not equal (indicating that the remote procedure has recompiled), the oracle server invalidates the local procedure and returns a runtime error. if the local procedure, which is now tagged as invalid, is invoked a second time, the oracle server recompiles it before executing, in accordance with the automatic local dependency mechanism. so if a local procedure returns a run-time error the first time that it is invoked, indicating that the remote procedures time stamp has changed, you should develop a strategy to re-invoke the local procedure.

  • What is the maximum number of imports that can be removed and have the code still compile? package aquarium; public class Water { }package aquarium;import java.lang.*;import...
    What is the maximum number of imports that can be removed and have the code still compile? package aquarium; public class Water { }package aquarium;import java.lang.*;import...
    4E. The first two imports can be removed because java.lang is automatically imported. The second two imports can be removed because Tank and Water are in the same package, making the correct answer E. If Tank and Water were in different packages, one of these two imports could be removed. In that case, the answer would be option D.

  • What is true about the following code? public class Bear {protected void finalize() {System.out.println("Roar!");}public static void main(String[] args) {Bear bear = new Bear();bear =...
    What is true about the following code? public class Bear {protected void finalize() {System.out.println("Roar!");}public static void main(String[] args) {Bear bear = new Bear();bear =...
    Finalize() might or might not be called Garbage collection might or might not run.B, E. Calling System.gc() suggests that Java might wish to run the garbage collector. Java is free to ignore the request, making option E correct. finalize() runs if an object attempts to be garbage collected, making option B correct.

  • Which two statements describe the state of a package variable after executing the package in which it is declared?
    Which two statements describe the state of a package variable after executing the package in which it is declared?
    1. it persists across transactions within a session. -2. it does not persist from session to session for the same user. -you can keep track of the state of a package variable or cursor, which persists throughout the user session, from the time the user first references the variable or cursor to the time the user disconnects. 1 initialize the variable within its declaration or within an automatic, one-time-only procedure. 2 change the value of the variable by means of package procedures. 3 the value of the variable is released when the user disconnects. incorrect answers b: each session will have its own value for the variables c: it persists across the transactions and through the user session. d: each user has his own values and results, because each user has his own users.

  • Which of the following options describe a stored procedure?
    Which of the following options describe a stored procedure?
    1. a stored procedure is a named pl/sql block that can accept parameters. -2. a stored procedure is a type of pl/sql subprogram that performs an action. -a procedure is a named pl/sql block that can accept parameters (sometimes referred to as arguments), and be invoked. generally speaking, you use a procedure to perform an action. a procedure has a header, a declaration section, an executable section, and an optional exception-handling section. a procedure can be compiled and stored in the database as a schema object. procedures promote reusability and maintainability. when validated, they can be used in any number of applications. if the requirements change, only the procedure needs to be updated.

  • Which of these languages can run within the database?
    Which of these languages can run within the database?
    Java PL/SQL SQLB,C, and D. SQL, PL/SQL and Java are implemented internally to the database. A is wrong because C is not available internally (though with OCI, it can of course be used for writing user processes). E is wrong because OCI is used for writing user processes that run externally to the database.

  • Do I need to be good at math to learn Java coding?
    Do I need to be good at math to learn Java coding?
    Math and programming have a somewhat misunderstood relationship. Many people think that you have to be good at math or made good grades in math class before you can even begin to learn to programme. 

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