CS

Question 1

What is unicode?

Answer 1

A universal encoding of all text characters. There’s over 140k characters encoded in Unicode represented by code points like U+0041.

Question 2

What are UTF encodings?

Answer 2

Encodings like UTF-8 and UTF-16 are encoding schemes that specify how code points like U+0041 are represented in bytes. For example, UTF-8 specified that unicode characters are represented in 1 (the range of ASCII characters) to 4 bytes.

Question 3

What is BOM in the context of Unicode?

Answer 3

A byte order mark. It is required in UTF-16 and UTF-32 to indicate endieanness - big endian being most significant byte first and little endian being the least significant byte first.

Question 4

What is parsing?

Answer 4

Parsing is the process of checking if textual input is syntactically correct according to some grammar.

Question 5

What is recursive descent parsing?

Answer 5

Recursive-descent parsing is one of the simplest parsing techniques that is used in practice. Recursive-descent parsers are also called top-down parsers, since they construct the parse tree top down (rather than bottom up).

Question 6

What is a grammar?

Answer 6

A grammar is a definition of the syntax of a language.

Question 7

What is a statement?

Answer 7

A group of expressions or other statements that you design to carry out an action.

Question 8

What is an expression?

Answer 8

Anything that evaluates to a value.