Files

Non-volatile information is stored as

• Lists

• Variables

• Arrays

• Files

Commonly used extension for plain text files is

• bin

• doc

• txt

• png

Commonly used extension for comma separated values file is

• txt

• csv

• bin

• zip

Text files

• can be read sequential

• can be read random

• can be read hybrid

• cannot be read

inputFile = open("data.txt", "r")

the "r" in the above statement is used to specify

• write to file

• create file

• overwrite file

• read from file

outFile = open("date.txt", "w")

what is incorrect in regards to "w" in the above statement ?

• write file

• create file

• overwrite file

• read from file

Which one of the following statements is incorrect in regards to CSV files ?

• each line contains a set of values

• the values are separated by commas

• sometimes the first row is a "header"

• can be read randomly

first, last, empid, salary = line2.split(',')

which one of the following statements is incorrect?

• lines2 has four fields

• fields are separated by a comma

• fields are assigned to four variables

• the statement is invalid

the variable fields will hold

• all the commas in line1

• all the fields in line1

• all the records from names.csv

• all the fields from names.csv

if "names.csv" consists of employee records such as "firstname", "lastname", "employee id", "dob",

the output from this program is

• all "firstname" in names.csv

• all "lastname" in names.csv

• all "employee id" in names.csv

• all "dob" in names.csv