
Kiểu xâu
Authored by Kiều Nguyễn
Science
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Xâu rỗng là xâu có độ dài bằng:
0
1
2
3
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Để biết độ dài của xâu s ta dùng hàm:
str(s)
len(s)
length(s)
s.len()
Answer explanation
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Để thay thế kí tự ‘a’ trong xâu s bằng một xâu mới rỗng ta dùng lệnh:
s=s.replace(‘a’,’ ’)
s=s.replace(' ',‘a’)
s=replace(a,’’)
s=s.replace()
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Kết quả đoạn chương trình sau là gì?
S="0123456789"
T=" "
for i in range(len(S)):
T=S[i]+T
print(T)
‘02468’
‘13579’
‘0123456789’
‘9876543210’
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Kết quả đoạn chương trình sau là gì?
s='4ab56c7123def'
for i in s:
if i in '0123456789':
print(i,end=" ")
‘4567123’
‘0123456789’
‘abcdef’
‘4ab56c7123def’
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Sau khi thực hiện đoạn lệnh sau, biến kq sẽ có giá trị bao nhiêu?
s='123456789'
kq=' '
for i in s:
if int(i)%2==0:
kq=kq+i
‘13579’
‘2468’
‘123456789’
‘987654321’
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Sau khi thực hiện đoạn lệnh sau, biến count sẽ có giá trị bao nhiêu?
s='1a2b3c4d5e'
count=0
for ch in s:
if 'a'<=ch<='z':
abcde
12345
5
0
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