Bash Shell Scripting - declare Statement

Bash Shell Scripting - declare Statement

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Hard

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The video tutorial explains the use of the declare statement in shell scripting. It covers how to declare variables, assign values, and export them as environment variables. The tutorial also demonstrates setting variables as read-only, restricting them to integers, and converting their case to uppercase or lowercase. The video concludes with a brief overview of the declare options discussed and mentions future topics on arrays.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of the declare statement in Bash?

To declare and manage variables

To compile code

To manage file permissions

To execute shell scripts

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you display all variables declared using the declare statement?

Using declare -x

Using declare -r

Using declare -a

Using declare -p

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which option allows you to export a variable to the environment using the declare statement?

declare -a

declare -x

declare -p

declare -r

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the declare -i option do?

Makes a variable read-only

Restricts a variable to integer values

Exports a variable to the environment

Converts a variable to lowercase

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens if you try to assign a string to a variable declared with declare -i?

The string is converted to an integer

The string is stored as is

An error is thrown

The variable is set to 0

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the declare -l option affect a variable?

It makes the variable read-only

It converts the variable's value to lowercase

It exports the variable to the environment

It restricts the variable to integer values

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which declare option automatically converts a variable's value to uppercase?

declare -r

declare -i

declare -u

declare -l