In the Linux Bash shell, the ____ key combination moves the cursor to the position just before the first character of the next word.

In the Linux Bash shell, the ____ key combination moves the cursor to the position just before the first character of the next word.

Alt+l
Alt+d
Ctrl+k
Ctrl+a


Answer: Alt+l

In the Linux Bash shell, the ____ key combination moves the cursor to the beginning of the command line.

In the Linux Bash shell, the ____ key combination moves the cursor to the beginning of the command line.

Ctrl+b
Alt+d
Alt+l
Ctrl+a


Answer: Ctrl+a

In the Linux Bash shell, the ____ key combination deletes the content of the command line from the current cursor position to the end of the command line.

In the Linux Bash shell, the ____ key combination deletes the content of the command line from the current cursor position to the end of the command line.

Ctrl+b
Alt+d
Ctrl+k
Ctrl+a


Answer: Ctrl+k

In the Linux Bash shell, the ____ key combination deletes a word or consecutive characters.

In the Linux Bash shell, the ____ key combination deletes a word or consecutive characters.

Ctrl+b
Alt+d
Alt+l
Ctrl+a


Answer: Alt+d

Fedora, Red Hat Enterprise Linux, SUSE, and Knoppix, recognize up to ____ characters in your user name.

Fedora, Red Hat Enterprise Linux, SUSE, and Knoppix, recognize up to ____ characters in your user name.

• 8
• 16
• 32
• 64

Answer: 32

Currently, the ____ project, a joint effort of experts from industry, academia, and government, is working to standardize UNIX.

Currently, the ____ project, a joint effort of experts from industry, academia, and government, is working to standardize UNIX.

• POSIX
• BSD
• ANSI
• Ubuntu

Answer: POSIX

A ____ is used to refer to the user's home directory.

A ____ is used to refer to the user's home directory.

• dot (.)
• dollar sign ($)
• forward slash (/)
• tilde (~)

Answer: tilde (~)

When a statement within a try block causes an exception, the remaining statements in the try block

When a statement within a try block causes an exception, the remaining statements in the try block

a. are executed before the statements in the catch block
b. are executed after the statements in the catch block
c. aren't executed


Answer: c. aren't executed

When is the code within a catch block executed?

When is the code within a catch block executed?

a. When the code in the try block doesn't compile
b. When the try block finishes executing
c. When a runtime error occurs
d. When the exception specified in the catch block is thrown in the try block


Answer: d. When the exception specified in the catch block is thrown in the try block

Which class in the following list of classes are all exceptions subclasses of?

Which class in the following list of classes are all exceptions subclasses of?

a. Throwable
b. Exception
c. Error
d. RuntimeException


Answer: b. Exception

Which of the following classes define exceptions that can occur in a Java application?

Which of the following classes define exceptions that can occur in a Java application?

a. ArithmeticException
b. NumberFormatException
c. NullPointerException
d. all of the above
e. none of the above


Answer: d. all of the above

You should validate user entries rather than catch and handle exceptions caused by invalid entries whenever possible because

You should validate user entries rather than catch and handle exceptions caused by invalid entries whenever possible because

a. data validation code should only be used for situations that are truly exceptional
b. all of the above
c. you can more accurately determine the cause of an invalid entry
d. your code will run faster


Answer: d. your code will run faster

Exception in thread "main" java.util.InputMismatchException

Exception in thread "main" java.util.InputMismatchException

at java.util.Scanner.throwFor(Scanner.java:818)
at java.util.Scanner.next(Scanner.java:1420)
at java.util.Scanner.nextDouble(Scanner.java:2324)
at FutureValueApp.main(FutureValueApp.java:17)
What is the order of method calls?

a. java.util.Scanner.throwFor calls java.util.Scanner.next calls java.util.Scanner.nextDouble calls FutureValueApp.main
b. FutureValueApp.main calls java.util.Scanner.nextDouble calls java.util.Scanner.next calls java.util.Scanner.throwFor
c. you can't tell from the information given


Answer: b. FutureValueApp.main calls java.util.Scanner.nextDouble calls java.util.Scanner.next calls java.util.Scanner.throwFor

Exception in thread "main" java.util.InputMismatchException

Exception in thread "main" java.util.InputMismatchException

at java.util.Scanner.throwFor(Scanner.java:818)
at java.util.Scanner.next(Scanner.java:1420)
at java.util.Scanner.nextDouble(Scanner.java:2324)
at FutureValueApp.main(FutureValueApp.java:17)
Which statement would you look at to find the source of the problem?



a. line 818 in the Scanner class
b. line 2324 in the Scanner class
c. line 17 in the FutureValueApp class
d. line 1420 in the Scanner class


Answer: c. line 17 in the FutureValueApp class

Exception in thread "main" java.util.InputMismatchException

Exception in thread "main" java.util.InputMismatchException

at java.util.Scanner.throwFor(Scanner.java:818)
at java.util.Scanner.next(Scanner.java:1420)
at java.util.Scanner.nextDouble(Scanner.java:2324)
at FutureValueApp.main(FutureValueApp.java:17)
What caused the exception to occur?



a. You can't tell from the information given.
b. The user didn't enter the type of data the program was expecting.
c. The program couldn't format the double value that the user entered.


Answer: b. The user didn't enter the type of data the program was expecting.

Exception in thread "main" java.util.InputMismatchException

Exception in thread "main" java.util.InputMismatchException

at java.util.Scanner.throwFor(Scanner.java:818)
at java.util.Scanner.next(Scanner.java:1420)
at java.util.Scanner.nextDouble(Scanner.java:2324)
at FutureValueApp.main(FutureValueApp.java:17)
What is this output called?



a. a method log
b. a stack trace
c. an exception handler
d. an exception hierarchy


Answer: b. a stack trace

You should validate user entries rather than catch and handle exceptions caused by invalid entries whenever possible because

You should validate user entries rather than catch and handle exceptions caused by invalid entries whenever possible because

a. all of the above
b. data validation code should only be used for situations that are truly exceptional
c. your code will run faster
d. you can more accurately determine the cause of an invalid entry


Answer: c. your code will run faster

Which of the following classes define exceptions that can occur in a Java application?

Which of the following classes define exceptions that can occur in a Java application?

a. ArithmeticException
b. NumberFormatException
c. NullPointerException
d. all of the above
e. none of the above


Answer: d. all of the above

Which class in the following list of classes are all exceptions subclasses of?

Which class in the following list of classes are all exceptions subclasses of?

a. Error
b. Exception
c. Throwable
d. RuntimeException


Answer: b. Exception

When is the code within a catch block executed?

When is the code within a catch block executed?

a. When the exception specified in the catch block is thrown in the try block
b. When the try block finishes executing
c. When the code in the try block doesn't compile
d. When a runtime error occurs


Answer: a. When the exception specified in the catch block is thrown in the try block