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Question 1:

When the command echo $ outputs 1, which of the following statements is true?

A. It is the process ID of the echo command.

B. It is the process ID of the current shell.

C. It is the exit value of the command executed immediately before echo.

D. It is the exit value of the echo command.

Correct Answer: C

Question 2:

Which command makes the shell variable named VARIABLE visible to subshells?

A. export $VARIABLE

B. export VARIABLE

C. set $VARIABLE

D. set VARIABLE

E. env VARIABLE

Correct Answer: B

Question 3:

What output will the command seq 10 produce?

A. A continuous stream of numbers increasing in increments of 10 until stopped.

B. The numbers 1 through 10 with one number per line.

C. The numbers 0 through 9 with one number per line.

D. The number 10 to standard output.

Correct Answer: B

Question 4:

Which of the following commands puts the output of the command date into the shell variable mydate?

A. mydate=”$(date)”

B. mydate=”exec date”

C. mydate=”$((date))”

D. mydate=”date”

E. mydate=”${date}”

Correct Answer: A

Question 5:

What is the difference between the commands test -e path and test -f path?

A. They are equivalent options with the same behaviour.

B. The -f option tests for a regular file. The -e option tests for an empty file.

C. Both options check the existence of the path. The -f option also confirms that it is a regular file.

D. The -f option tests for a regular file. The -e option tests for an executable file.

Correct Answer: C

102-400 PDF Dumps102-400 Study Guide102-400 Exam Questions

Question 6:

How can the existing environment variable FOOBAR be suppressed for the execution of the script./ myscript only?

A. unset -v FOOBAR;./myscript

B. set -a FOOBAR=””;./myscript

C. env -u FOOBAR./myscript

D. env -i FOOBAR./myscript

Correct Answer: C

Question 7:

When the command echo $$ outputs 12942, what is the meaning of 12942?

A. It is the process ID of the echo command.

B. It is the process ID of the current shell.

C. It is the process ID of the last command executed.

D. It is the process ID of the last command which has been placed in the background.

Correct Answer: B

Question 8:

What output will the following command produce?

seq 1 5 20

A. 1

B. 1

C. 1

D. 2

E. 5

Correct Answer: A

Question 9:

Which of the following commands lists all defined variables and functions within Bash?

A. env

B. set

C. env -a

D. echo $ENV

Correct Answer: B

Question 10:

Which of the following SQL queries counts the number of occurrences for each value of the field order_type in the table orders?

A. SELECT order_type,COUNT(*) FROM orders WHERE order_type=order_type;

B. SELECT order_type,COUNT(*) FROM orders GROUP BY order_type;

C. COUNT(SELECT order_type FROM orders);

D. SELECT COUNT(*) FROM orders ORDER BY order_type;

E. SELECT AUTO_COUNT FROM orders COUNT order_type;

Correct Answer: B

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