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YAML MCQs and Answers with Explanation – YAML, short for “YAML Ain’t Markup Language”, is a human-readable data serialization format used for configuration files, data exchange, and other similar applications. It is often used in programming languages like Python, Ruby, and JavaScript, and is known for its simplicity, flexibility, and ease of use. To assess one’s understanding of YAML, one can take a YAML quiz or attempt YAML MCQs and Answers that are accommodated in this article.
YAML MCQ Questions with Answers
YAML MCQ Questions with Answers are designed to test the candidate’s knowledge of YAML through a set of multiple choice questions. These questions cover various aspects of YAML, including its syntax, data types, and functionality. A YAML quiz or YAML Multiple Choice Questions can help individuals to evaluate their level of understanding and identify areas for improvement. By taking a YAML quiz, one can gain a better understanding of YAML and its use cases.
YAML Multiple Choice Questions
| Name | YAML |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 30 YAML MCQs and Answers | YAML Quiz
1. What is YAML?
A) A programming language
B) A markup language
C) A data serialization format
D) A networking protocol
Answer: C
Explanation: YAML is a data serialization format, meaning it is used to convert data from one format to another.
2. Which of the following is a valid YAML file extension?
A) .html
B) .yaml
C) .txt
D) .pdf
Answer: B
Explanation: The file extension for YAML files is .yaml.
3. What is the syntax for creating a list in YAML?
A) – item1, item2, item3
B) – [item1, item2, item3]
C) – [item1,item2,item3]
D) [item1, item2, item3]
Answer: C
Explanation: In YAML, a list is created using a dash (-) followed by a space, then the list item.
4. What is the syntax for creating a dictionary in YAML?
A) {key1: value1, key2: value2, key3: value3}
B) [key1: value1, key2: value2, key3: value3]
C) {key1, value1, key2, value2, key3, value3}
D) [key1, value1, key2, value2, key3, value3]
Answer: A
Explanation: In YAML, a dictionary is created using a key-value pair in the format of key: value.
5. What is the purpose of YAML anchors and aliases?
A) To reference a block of code
B) To assign a variable to a block of code
C) To reduce duplication in YAML files
D) To declare a function in YAML
Answer: C
Explanation: YAML anchors and aliases are used to reduce duplication in YAML files by referencing a block of code.
6. Which of the following is a scalar data type in YAML?
A) List
B) Dictionary
C) Boolean
D) Set
Answer: C
Explanation: A scalar data type is a single value, such as a string, number, or boolean.
7. What is the purpose of the YAML comment character (#)?
A) To indicate the start of a new YAML document
B) To add a comment to a YAML file
C) To separate YAML keys and values
D) To indicate the end of a YAML document
Answer: B
Explanation: The # character in YAML is used to add comments to the file, which are ignored by the parser.
8. What is the difference between a YAML scalar and a YAML sequence?
A) A scalar is a single value, while a sequence is a list of values
B) A scalar is a dictionary, while a sequence is a list
C) A scalar is a boolean, while a sequence is a string
D) A scalar is a number, while a sequence is a float
Answer: A
Explanation: A scalar is a single value, such as a string or number, while a sequence is a list of values.
9. Which of the following is a valid YAML boolean value?
A) Yes
B) True
C) On
D) All of the above
Answer: D
Explanation: YAML supports multiple boolean values, including Yes, True, and On.
10. What is the purpose of a YAML tag?
A) To indicate the start of a new YAML document
B) To add metadata to a YAML file
C) To specify the data type of a YAML value
D) To reference a block of code in a YAML file
Answer: C
Explanation: A YAML tag is used to specify the data type of a YAML value, such as a string or number.
11. Which of the following is a valid YAML datetime value?
A) 2022-01-01
B) 01/01/2022
C) 2022-01-01T12:00:00Z
D) January 1st, 2022
Answer: C
Explanation: A valid YAML datetime value must be in the format of YYYY-MM-DDTHH:MM:SSZ.
12. What is the purpose of a YAML directive?
A) To declare a function in YAML
B) To add metadata to a YAML file
C) To indicate the start of a new YAML document
D) To specify the version of YAML being used
Answer: D
Explanation: A YAML directive is used to specify the version of YAML being used in the file.
13. Which of the following is a valid YAML merge key?
A) <<
B) **
C) <<
D) ||
Answer: A
Explanation: The merge key in YAML is <<.
14. What is the purpose of a YAML anchor?
A) To add metadata to a YAML file
B) To reference a block of code in a YAML file
C) To specify the version of YAML being used
D) To declare a function in YAML
Answer: B
Explanation: A YAML anchor is used to reference a block of code in a YAML file.
15. What is the difference between a YAML flow style and a YAML block style?
A) Flow style is for lists, while block style is for dictionaries
B) Flow style uses braces, while block style uses dashes and colons
C) Flow style is more compact, while block style is more readable
D) Flow style is for dictionaries, while block style is for lists
Answer: C
Explanation: Flow style is more compact and uses braces, while block style is more readable and uses dashes and colons.
16. Which of the following is a valid YAML alias?
A) &item1
B) *item1
C) #item1
D) !item1
Answer: B
Explanation: An alias in YAML is denoted by the * character.
17. What is the purpose of a YAML multi-line string?
A) To split a long string into multiple lines for readability
B) To add metadata to a YAML file
C) To indicate the start of a new YAML document
D) To declare a function in YAML
Answer: A
Explanation: A multi-line string in YAML is used to split a long string into multiple lines for readability.
18. Which of the following is a valid YAML mapping?
A) [key1: value1, key2: value2, key3: value3]
B) {key1, value1, key2, value2, key3, value3}
C) {key1: value1, key2: value2, key3: value3}
D) [key1, value1], [key2, value2], [key3, value3]
Answer: C
Explanation: A YAML mapping is created using key-value pairs in the format of key: value.
19. What is the difference between a YAML scalar and a YAML mapping?
A) A scalar is a single value, while a mapping is a list of values
B) A scalar is a dictionary, while a mapping is a list
C) A scalar is a boolean, while a mapping is a string
D) A scalar is a number, while a mapping is a collection of key-value pairs
Answer: D
Explanation: A scalar is a single value, such as a string or number, while a mapping is a collection of key-value pairs.
20. What is the purpose of a YAML comment?
A) To add metadata to a YAML file
B) To explain the purpose of a YAML element
C) To declare a function in YAML
D) To indicate the start of a new YAML document
Answer: B
Explanation: A YAML comment is used to explain the purpose of a YAML element and is denoted by the # character.
21. Which of the following is a valid YAML boolean value?
A) Yes
B) True
C) 1
D) All of the above
Answer: B
Explanation: A valid YAML boolean value can be expressed as either true or false.
22. What is the purpose of a YAML tag?
A) To add metadata to a YAML file
B) To indicate the start of a new YAML document
C) To specify the type of a YAML value
D) To reference a block of code in a YAML file
Answer: C
Explanation: A YAML tag is used to specify the type of a YAML value.
23. Which of the following is a valid YAML sequence?
A) {item1, item2, item3}
B) [item1, item2, item3]
C) (item1, item2, item3)
D) <item1, item2, item3>
Answer: B
Explanation: A YAML sequence is represented using square brackets, such as [item1, item2, item3].
24. What is the purpose of a YAML anchor in a sequence?
A) To reference a specific item in the sequence
B) To add metadata to a YAML file
C) To indicate the start of a new YAML document
D) To declare a function in YAML
Answer: A
Explanation: A YAML anchor can be used in a sequence to reference a specific item in the sequence.
25. Which of the following is a valid YAML timestamp value?
A) 2022-01-01T12:00:00Z
B) 01/01/2022 12:00:00
C) 01-01-2022 12:00:00
D) January 1st, 2022 12:00:00
Answer: A
Explanation: A valid YAML timestamp value must be in the format of YYYY-MM-DDTHH:MM:SSZ.
26. What is the purpose of a YAML null value?
A) To indicate the absence of a value
B) To add metadata to a YAML file
C) To indicate the start of a new YAML document
D) To declare a function in YAML
Answer: A
Explanation: A YAML null value is used to indicate the absence of a value.
27. Which of the following is a valid YAML mapping key?
A) “key1”
B) key1
C) key-1
D) all of the above
Answer: D
Explanation: A YAML mapping key can be expressed as a string, number, or boolean value.
28. What is the purpose of a YAML tag in a sequence?
A) To specify the type of the sequence items
B) To reference a specific item in the sequence
C) To add metadata to a YAML file
D) To indicate the start of a new YAML document
Answer: A
Explanation: A YAML tag can be used in a sequence to specify the type of the items in the sequence.
29. Which of the following is a valid YAML binary value?
A) 10101010
B) “10101010”
C) !!binary “10101010”
D) all of the above
Answer: C
Explanation: A YAML binary value is denoted by the !!
30. Which of the following is a valid YAML merge key?
A) <<
B) >>
C) &
D) *
Answer: A
Explanation: A YAML merge key is denoted by the << symbol and is used to merge multiple mappings together.
Attempting YAML MCQs is a useful way to test one’s knowledge of YAML and improve their understanding of this data serialization format. By taking a YAML quiz or MCQs, individuals can identify their strengths and weaknesses and gain the confidence to work with YAML in their programming projects. And do follow our Freshersnow for more technical quizzes.