A Small Quiz about Program Query Languages

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Please answer to all the questions. Internal error {} has not a valid extension. {} is too heavy.

Question 1: PQL Purpose

What is the primary purpose of any Program Query Language (PQL)? (Multiple answers possible.)

Designing user interfaces

Logic reasoning to solve complex problems

Consulting a database

Transforming code

Querying the structure or behaviour of a software program

Executing program code

Generating code documentation

Finding bugs or enforcing coding standards

Question 2: PQL Kind

Which kind of program query language will we use in this experiment?

Dynamic Program Query Language

Static Program Query Language

Live Program Query Language

Interactive Program Query Language

Question 3: Declarative Language

Define briefly, in your own words, what it means for a computer language to be declarative.

Question 4: Declarative PQL

Which of the following program query languages or tools allow you to write queries in a declarative way? (Multiple answers possible.)

CodeQL

Regular Expressions

Pyttern

AST traversal

XPath

Prolog

Question 5: Static vs. Dynamic PQL

Explain in your own words the difference between a static program query language and a dynamic program query language.

Question 6: Database Representation

Which program query language is an SQL-like language that reasons over a program representation stored as tables in a database? (Multiple answers possible.)

RegEx

Pyttern

AST traversal

Prolog

CodeQL

Question 7: RegEx Example

Which line would the following regex match?

'\".*\"\s*\+str\(\w+\)'

(Multiple answers possible.)

"value"+str(object)

"value" + object

"" + str(object)

""+ object

Question 8: AST Traversal

When using Python's AST module to visit the nodes in a program AST, how does the 'NodeVisitor' class handle traversal of the AST?

By generating new AST nodes based on existing ones

By modifying the structure of the AST nodes

By executing code within each AST node

By recursively visiting child nodes of each AST node

Question 9: Visitor Design Pattern

Briefly explain, in your own words, what the Visitor design pattern is and how it works.

Question 10: Pyttern Example

What would the pattern def ?(?*): match in Pyttern?

Any function definition with a specified number of arguments

Any function definition with no arguments

Any function definition with any name and any number of arguments of any type

Any function definition with at least 1 argument

Deadline	Geen deadline
Submission limit	No limitation

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