LPCh4

Question 1

what are the builtin sequence types?

Answer 1

strings, lists, tuples

Question 2

how to access a component of a sequences?

Answer 2

by indexing

Question 3

what is the builtin function to find the length of a sequence?

Answer 3

len()

Question 4

in a sequence, what does a negative index do?

Answer 4

the index is the offset starting from the end ( the right)

Question 5

when using the square bracket syntax for indexing s[], what can be inside the brackets?

Answer 5

any expression - a literal, a variable, an expression

Question 6

what is the syntax to perform slicing on a sequence ?

Answer 6

sting[0:4]

Question 7

in the slice s = tag[i:j], is index i and j included in slice?

Answer 7

i is, j isn’t

Question 8

s = ‘test’
t = s[0:2]
what is t ?

Answer 8

‘tes’

Question 9

what is the syntax for sequence repetition and concatenation

Answer 9

‘test’ * 4

‘test’ + ‘more’

Question 10

are python string immutable?

Answer 10

yes

Question 11

which builtin types are immutable? which are not

Answer 11

immutable - string, tuples, numbers

mutable - dictionary, lists, sets