2024年6月青少年软件编程Python等级考试试卷六级真题(含答案)
2024年6月青少年软件编程Python等级考试试卷六级真题(含答案)分数:100 题数:38一、单选题(共25题,共50分)。1.运行下面代码的正确结果是()。with open("example.txt", "a") as file: file.write("I see you.")其中example.txt文件内容如下: This is an example.A.This is an example.B.I see you.C.This is an example.I see you.D.I see you.This is an example.标准答案:C。2.在Python中,以下哪个函数可以用于创建一个新的文件()。A.write( )B.create( )C.new( )D.open( )标准答案:D。3.运行下面代码的正确结果是()。filename = "example.txt"line_count = 0with open(filename, "r") as file: for line in file: line_count += 1print(f"The file 'example' has line_count lines.")其中example.txt文件内容如下: My Favorite AnimalOnce upon a time, I had a pet dog named Max.Max was the most obedient dog I knew.We played fetch in the park, went on long walks in the woods, and even took naps together on lazy afternoons.A.4B.3C.2D.1标准答案:A。4.运行下面代码的正确结果是()。with open("myfile.txt", "w") as out_file: out_file.write("This is my first Python program.")with open("myfile.txt", "r") as in_file: myfile = in_file.read()print(myfile)其中myfile.txt文件内容如下: Hello World!A.Hello World!B.This is my first Python program.C.Hello World!This is my first Python program.D.Hello World!This is my first Python program.标准答案:B。5.编写程序绘制如下图所示的直线,程序空白处应填()。import matplotlib.pyplot as pimport numpy as npx= np.array(0,1,2,_,4,5)p.plot(x,'o:r')p.show()A.1B.2C.3D.4标准答案:C。6.已知程序1绘制的图形如下图所示,要绘制相同的图形,请补全程序2空白()。程序1:import matplotlib.pyplot as pimport numpy as npx= np.array(0,1,0,1,0,1,0)p.plot(x,'o:r')p.show()程序2:import matplotlib.pyplot as pimport numpy as npx= np.array(3,4,3,_,3,4,3)p.plot(x,'o:r')p.show()A.1B.2C.3D.4标准答案:D。7.在命令行窗口分别运行以下代码,输出结果是()。>>>import numpy as np>>>np.full(6,'6')A.array('6', '6', '6', '6', '6', '6'B.array(6, 6, 6, 6, 6, 6C.6, 6, 6, 6, 6, 6D.'6', '6', '6', '6', '6', '6'标准答案:A。8.运行以下关于二维数组读取的程序,输出结果是()。a=1,2,3,4,5,6,7,8,9print(a12)A.2B.4C.5D.6标准答案:D。9.运行以下代码,绘制出来的第六个柱形图颜色是()。import matplotlib.pyplot as pimport numpy as npx=np.array('a','b','c','d','e','f')h=np.array(1,4,5,6,4,3)c=np.array('red','blue','green')p.bar(x=x,height=h,color=c)p.show()A.redB.blueC.greenD.black标准答案:C。10.关于JSON格式数据转为Python数据格式,运行以下程序,输出结果是()。import jsona='"name": "张三", "age": 30, "city": "北京"'b=json.loads(a)c=list(b.keys()d=list(b.values()print(d2)A.ageB.cityC.北京D.30标准答案:C。11.下列哪个选项不能在SQLite数据库中运行()。A.10B.'10'C.10,11D.None标准答案:C。12.CREAT TABLE Users (id,name,password,role)关于上述语句,说法错误的是()。A.id作为唯一标识,约束条件为PRIMARY和NOT NULLB.name是可以重复的C.password的约束条件为NOT NULLD.role为一个不定长的字符串标准答案:B。13.关于以下代码,说法错误的是()。import sqlite3conn = sqlite3.connect('./mydb.sqlite')cur = conn.cursor()sql = '''INSERT INTO Users (name,password,role) VALUES (?,?,?)'''cur.execute(sql,('admin','123456','管理员')cur.execute(sql,('admin','123456','管理员')cur.execute(sql,('user','123456','普通用户')mit()A.conn = sqlite3.connect('./mydb.sqlite'),如果mydb.sqlite不存在会自动创建。B.cur = conn.cursor(),的作用是获取一个数据的游标。C.sql = '''INSERT INTO Users (name,password,role) VALUES (?,?,?)'''中?的作用是占位符。D.运行结果会添加两个admin的管理员账号。标准答案:D。14.执行下面程序后,选项中值为1的是()。n=3m=2dp=0 for i in range(n)for j in range(m)dp.append(0,0,n-m)dp.insert(-1,n for i in range(n)print(dp)A.dpmnB.dpnmC.dplen(dp)-10D.dpm0标准答案:B。15.执行下面程序后,列表a的值可能是()。import randoma=0*6for i in range(1,6): tmp=random.randint(5,24) if tmp%2=0 or i%2=1: ai=ai-1+tmpprint(a)A.0,9,29,50,0,20B.1,11,44,62,86,109C.0,8,14,21,39,0D.0,10,24,43,0,30标准答案:A。16.题'data1.csv'文件的内容如下图,若要打印每个同学的数学成绩,划线处的代码是()。import csvfile=open('data1.csv')file1=csv.reader(file)next(file1)for i in file1: print(_)A.i1B.i2C.i3D.file2标准答案:B。17.下面代码会查询users表中哪些人的年龄()。import sqlite3conn = sqlite3.connect('mydatabase.db')c = conn.cursor()c.execute("SELECT * FROM users WHERE age > ?", (30,)results = c.fetchall()for row in results: print(row)conn.close()A.年龄等于30的人B.年龄大于30的人C.年龄小于30的人D.所有人的年龄标准答案:B。18.以下代码,运行结果是()。class Person(): def _init_(self, name, age): self.name = name self.age = age def introduce(self): return f"My name is self.name and I am self.age years old."p = Person("Alice", 30)print(p.introduce()A.My name is Alice and I am 30 years old.B.My name is Person and I am 30 years old.C.My name is Alice and I am 0 years old.D.My name is 30 and I am Alice years old.标准答案:A。19.下列代码的输出结果是()。class MyClass(): def _init_(self): self.x = 10 self.y = 20 def add(self): return self.x * self.yobj = MyClass()