CLI output formats (json, table, text) in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the AWS CLI output format to JSON.

AWS

aws configure set output [1]

Drag options to blanks, or click blank then click option'

Axml

Btable

Ctext

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'table' or 'text' when JSON format is required.

Using unsupported formats like 'xml'.

The command sets the AWS CLI output format to JSON, which is a structured data format.

2fill in blank

medium

Complete the code to display AWS CLI output in a table format.

AWS

aws s3 ls --output [1]

Drag options to blanks, or click blank then click option'

Atable

Bjson

Ctext

Dyaml

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'json' or 'text' instead of 'table' for table output.

Using unsupported formats like 'yaml'.

The --output table option formats the AWS CLI output as a readable table.

3fill in blank

hard

Fix the error in the command to output AWS CLI results as plain text.

AWS

aws ec2 describe-instances --output [1]

Drag options to blanks, or click blank then click option'

Ajson

Btext

Ctable

Dcsv

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'csv' which is not a supported AWS CLI output format.

Using 'json' or 'table' when plain text is needed.

The text output format shows the AWS CLI results as plain text, suitable for simple reading or scripting.

4fill in blank

hard

Fill both blanks to configure AWS CLI to output in JSON and then list S3 buckets.

AWS

aws configure set output [1]
aws s3 ls --output [2]

Drag options to blanks, or click blank then click option'

Ajson

Btable

Ctext

Dyaml

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing output formats between commands.

Using unsupported formats like 'yaml'.

Both commands use JSON format for output, which is structured and easy to parse.

5fill in blank

hard

Fill all three blanks to set AWS CLI output to table, list EC2 instances in table format, and then switch output to text.

AWS

aws configure set output [1]
aws ec2 describe-instances --output [2]
aws s3 ls --output [3]

Drag options to blanks, or click blank then click option'

Ajson

Btable

Ctext

Dyaml

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent output formats in the first two commands.

Using unsupported formats like 'yaml'.

The first two commands use table format for readable output, and the last command uses text format for simple listing.

Practice

1. What does the --output json option do when used with an AWS CLI command?

easy

A. It displays the output as a simple text list.

B. It saves the output directly to a file.

C. It shows the output in a table format for easy reading.

D. It formats the command output as structured JSON data.

Solution

1. Step 1: Understand the purpose of --output option

   The --output option controls how AWS CLI displays command results.

2. Step 2: Identify what 'json' output means

   Choosing json formats the output as structured JSON, which is machine-readable and easy to parse.

3. Final Answer:

   It formats the command output as structured JSON data. -> Option D

4. Quick Check:

   --output json = structured JSON output [OK]

Hint: JSON output is structured and good for programs [OK]

Common Mistakes:

• Confusing JSON with table or text output
• Thinking JSON saves output to a file automatically
• Assuming JSON is for human reading only

2. Which of the following is the correct syntax to display AWS CLI command output in a table format?

easy

A. aws ec2 describe-instances --output table

B. aws s3 ls --output text

C. aws iam list-users --format table

D. aws lambda list-functions --output json

Solution

1. Step 1: Identify the correct option for table output

   The AWS CLI uses --output table to format output as a table.

2. Step 2: Check each option's syntax

   aws ec2 describe-instances --output table uses --output table correctly. aws iam list-users --format table uses --format which is invalid. Options B and D use other formats.

3. Final Answer:

   aws ec2 describe-instances --output table -> Option A

4. Quick Check:

   Table output uses --output table [OK]

Hint: Use --output table for readable tables [OK]

Common Mistakes:

• Using --format instead of --output
• Confusing text and table output options
• Missing the --output flag entirely

3. Given the command aws s3api list-buckets --output text, what is the expected format of the output?

medium

A. A JSON object with bucket details.

B. Plain text with bucket names and details separated by tabs.

C. An XML formatted list of buckets.

D. A human-friendly table with borders.

Solution

1. Step 1: Understand the --output text format

   The text output format produces plain text with fields separated by tabs, suitable for scripts.

2. Step 2: Match output format to options

   Plain text with bucket names and details separated by tabs. describes plain text with tab-separated values, which matches --output text. JSON and XML are not text formats, and table includes borders.

3. Final Answer:

   Plain text with bucket names and details separated by tabs. -> Option B

4. Quick Check:

   --output text = tab-separated plain text [OK]

Hint: Text output is tab-separated plain text [OK]

Common Mistakes:

• Confusing text output with JSON or table
• Expecting borders or formatting in text output
• Assuming XML output is default

4. You run aws ec2 describe-instances --output tab but get an error. What is the likely cause?

medium

A. The AWS CLI version does not support output formatting.

B. The command requires additional parameters to run.

C. The correct output format is 'table', not 'tab'.

D. The 'tab' output format is deprecated and replaced by 'text'.

Solution

1. Step 1: Identify the valid output formats

   AWS CLI supports 'json', 'table', and 'text' as output formats. 'tab' is not valid.

2. Step 2: Analyze the error cause

   Using 'tab' instead of 'table' causes a syntax error because 'tab' is not recognized.

3. Final Answer:

   The correct output format is 'table', not 'tab'. -> Option C

4. Quick Check:

   Valid formats: json, table, text [OK]

Hint: Use 'table' not 'tab' for table output [OK]

Common Mistakes:

• Typing 'tab' instead of 'table'
• Assuming 'tab' is a valid alias
• Ignoring error messages about output format

5. You want to write a script that extracts only the bucket names from aws s3api list-buckets. Which output format should you choose to easily parse the bucket names in a shell script?

hard

A. Use --output text for simple tab-separated values.

B. Use --output table and extract names from the table.

C. Use --output json and parse with a JSON tool.

D. Use --output xml for structured parsing.

Solution

1. Step 1: Consider parsing ease in shell scripts

   Shell scripts handle plain text easily, especially tab-separated values.

2. Step 2: Match output format to parsing needs

   --output text produces simple tab-separated output, ideal for shell tools like cut or awk. JSON requires extra tools, table is formatted for humans, XML is unsupported.

3. Final Answer:

   Use --output text for simple tab-separated values. -> Option A

4. Quick Check:

   Text output is easiest for shell parsing [OK]

Hint: Text output is easiest for shell scripts [OK]

Common Mistakes:

• Choosing JSON without JSON parsing tools
• Trying to parse table output in scripts
• Assuming XML output is supported