S Expression in LISP : Practice MCQ Questions & Answers with Explanations

Atoms are also considered as S-expressions. Rather S-expressions are formed from atoms.

In LISP programming if X and Y are S-expressions then the dotted pair (X.Y) is also considered as S-expression.

Atoms are building blocks of S-expressions. Even atoms are considered as a fundamental unit of LISP.

Yes, all the program statements and data are represented by S-expressions in LISP. S-expressions or symbolic expressions are the syntactic elements of the LISP programming language.

S-expression consists of both Atoms and Lists. It also consists of numeric and literals.

It works same as (write 'argument) because LISP is case insensitive language.

LISP is not a case sensitive language. Example: (print 'a) will behave same as (PRINT 'A).

An empty thing is also considered as List. Empty thing means the braces () with no arguments. Numbers are not counted in Lists.

Atoms consist of Literals, Numbers, Integers, Ratios, Flonum. Lists are formed from atoms. Cons of two atoms is referred to as List.

According to recursive definition of S-expression if S1, S2, S3... are S-expressions then list: (S1 S2 S3 ....) is also an S-expression. S-expression is short form of symbolic expressions.