Lecture 4

Question 1

?

is exactly mnemonic character string used to represent something else.

Answer 1

name

Question 2

name = ?

Names

Answer 2

identifier

Question 3

? vary by different languages: foo, foo_bar, foo-name, fooBar, etc

Names

Answer 3

Valid names

Question 4

?

is a word that is special only in certain contexts.

Names

Answer 4

keyword

Question 5

?

is a name with fixed purpose

Names

Answer 5

Reserved words

Question 6

Most newer languages prefer ?.

Names

Answer 6

reserved words

Question 7

? limitations are different for different languages

Names

Answer 7

Length

Question 8

?

: maximum of 31 characters

Names - Language examples

Answer 8

FORTRAN 95

Question 9

?

: no limit but only the first 63 are significant; also, external names are limited to a maximum of 31 characters: maximum of 31 characters

Names - Language examples

Answer 9

C99

Question 10

?

: no limit and all are significant.

Names - Language examples

Answer 10

C#, Ada, and Java

Question 11

?

: no limit, but implementers often impose one.

Names - Language examples

Answer 11

C++

Question 12

?

usually are non-alphanumeric characters

Names

Answer 12

Special Characters

Question 13

?

all variable names must begin with dollar sign.

Names - Special Characters

Answer 13

PHP

Question 14

?

all variable names begin with special characters, which specify the variable’s
type

Names - Special Characters

Answer 14

Perl

Question 15

?

all variable names begin with special characters, which specify the variable’s
type

Names - Special Characters

Answer 15

Perl