Is Java a pure object oriented language?

Correct Answer: PATH and CLASSPATH are operating system level environment variables PATH is used to define where the system can find the executables (exe) files whereas CLASSPATH is used to specify the location of class files

Correct Answer: 12

Explanation:

We can apply at max of 12 triggers in a table.

Correct Answer: DocumentDB is a NoSQL document-oriented database and records saves in key-value pairs It's same as the other NoSQL document-oriented such as MongoDB

Correct Answer: All the above

Correct Answer: Insert image into a table Create the following table: create table pics_table ( bfile_id number, bfile_desc varchar2(30), bfile_loc bfile, bfile_type varchar2(4)) TABLESPACE appl_data storage (initial 1m next 1m pctincrease 0) Insert Query: INSERT INTO pics_table VALUES(4,'test image',bfilename('GIF_FILES','TestJPG'),'JPEG');

Correct Answer: The variable should be declared as static and final So only one copy of the variable exists for all instances of the class and the value can't be changed also static final int PI = 214; is an example for constant

Correct Answer: A protected method can be accessed by the classes within the same package or by the subclasses of the class in any package

Correct Answer: A method declared as final can't be overridden A sub-class can't have the same method signature with a different implementation

Correct Answer: /** **/

Explanation:

• //               is a single line comment
• /*  */          is commenting on one or more lines
• /** */         is documentation comment

Correct Answer: "X extends Y" is correct if X and Y are either both classes or both interfaces

Explanation:

A is incorrect because classes implement interfaces, they don't extend them. B is incorrect because interfaces only "inherit from" other interfaces. D is incorrect based on the preceding rules.