Python面试真题答案或案例如下: 请等待. #coding=utf-8 #1.一行代码实现1--100之和 print(sum(range(1,101))) #2.如何在一个函数内部修改全局变量 a = 1 def funcs(): global a a = a +1 print(a) funcs() #3.列出5个python标准库 import datetime,os,sys,re,math #4.字典如何删除键和合并两个字典 student ={"age":18,"
利用切片操作,实现一个trim()函数,去除字符串首尾的空格,注意不要调用str的strip()方法. 正解1: def trim(s): while s[:1] == ' ': s = s[1:] while s[-1:] == ' ': s = s[:-1] return s 正解2: def trim(s): if s[:1] == ' ': s = trim(s[1:]) if s[-1:] == ' ': s = trim(s[:-1]) return s 容易写错的方法: def t
第二章 Python语言基本语法元素 一.选择题C B B C A D B A D B二.编程题1.获得用户输入的一个整数N,计算并输出N的32次方.在这里插入图片描述2.获得用户输入的一段文字,将这段文字进行垂直输出.在这里插入图片描述3.获得用户输入的一个合法算式,例如1.2+3.4,输出运算结果.在这里插入图片描述4.获得用户输入的一个小数,提取并输出其整数部分.在这里插入图片描述5.获得用户输入的一个整数N,计算并输出1到N相加的和.在这里插入图片描述第三章 数字类型 一.选择题C A
1. (10) name='aleX leNb' print(name.split('l',1)) (13) name='aleX leNb' a=name.replace('a','A') print(a) (14) name='aleX leNb' count=0 for i in name: if i =='l': count+=1 print(count) (15) name='aleX leNb' count=0 for i in name[0:4]: if i =='l': coun
32. Examine these commands and their output: • SQL> SELECT * FROM emp; • ENO ENAME • ---- ----- • 100 Adam • 101 Alan • SQL> INSERT INTO emp VALUES(102,'Ben"); • 1 row created. • SQL> COMMIT; • Commit completed. • SQL> UPDATE emp SET enam
31.Which two events always request the LGWR to write? A) when LGWR is notified by a server process that performs a Commit or ROLLBACK B) When PMON restarts a server process C) when DBWn writes dirty buffers D) when a log switch occurs E) when a check
30.Which is true when a database instance is shut down? A. Only transactional and normal modes wait for all uncommitted transactions to commit or rollback and then close the database. B. Immediate, transactional, and normal modes all result in a chec
23.Which two are true about data dictionary and dynamic performance views (v$ views)? A) All database users have access to ALL_* views. B) Data dictionary view output is subject to read consistency. C) The defining queries for Oracle supplied dynamic
22.You are planning a software installation for both Oracle Database 11g Release 1 and Release 2. You plan to have at lease one database for each release managed by Grid Infrastructure for a Standalone Server. Which three are true in this scenario? A