highlight the correct answer and provide proper explanation 6. A class should take any number as an argument but no other data types. Which code does this? a. public class xyz b. public class xyz c. public class xyz d. public class xyz 7. Log4j.properties is set to 'warn'. Which would show in the log file? a. Info b. Debug c. Trace d. Error 8. Which would lock an object so that it could only be used by a single thread? a. join() b. yield() c. synchronized() d. start() 9. Which of the following is an example of a dependency between 2 objects? a. Vehicle and car b. Person and employee c. Pilot and plane d. Generic database reader and Oracle database reader
highlight the correct answer and provide proper explanation
6. A class should take any number as an argument but no other data types. Which code does this?
a. public class xyz <T>
b. public class xyz <T extends Number>
c. public class xyz <T implements Number>
d. public class xyz <T extends Integer>
7. Log4j.properties is set to 'warn'. Which would show in the log file?
a. Info
b. Debug
c. Trace
d. Error
8. Which would lock an object so that it could only be used by a single thread?
a. join()
b. yield()
c. synchronized()
d. start()
9. Which of the following is an example of a dependency between 2 objects?
a. Vehicle and car
b. Person and employee
c. Pilot and plane
d. Generic
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