ItLec prelims pt2

Question 1

a sequence of characters

Answer 1

string

Question 2

computers do not deal with characters they deal with___________

Answer 2

numbers (binary)

Question 3

Conversion of character to number is called ______ and the reverse is called ___________

Answer 3

encoding
decoding

Question 4

___________ and _________ are some of the popular encodings used.

Answer 4

ASCII and Unicode

Question 5

In python a string is a sequence of _________ characters

Answer 5

unicode

Question 6

was introduced to include every character in all languages and bring uniformity in encoding

Answer 6

Unicode

Question 7

You can access individual characters using

Answer 7

indexing

Question 8

Trying to access a char out of index range will raise an

Answer 8

indexerror

Question 9

An index must be an integer any other type will result in

Answer 9

TypeError

Question 10

Strings are Immutable
T or F

Answer 10

T

Question 11

To delete tge string entirely is possible using the

Answer 11

del keyword

Question 12

returns an enumerate object, it contains the index and value of all the items

Answer 12

enumerate()

Question 13

starts with a backslash and is interpreted differently

Answer 13

escape sequence

Question 14

To ignore the escape sequence inside a string place a

Answer 14

r or R infront of the string

Question 15

is available with the string object is very versatile and powerful for FORMATTING strings

Answer 15

format()

Question 16

format strings contain ___________ as place holders

Answer 16

curly braces{}

Question 17

Format are separated from the field name using

Answer 17

Colon

Question 18

is a module to manipulate and manage date and time information

Answer 18

datetime

Question 19

the handling for date time is

Answer 19

datetime.datetime

Question 20

you need to import datetime before ytou use it
T or F

Answer 20

T

Question 21

To format datetime objects use

Answer 21

strftime()

Question 22

to perfrom arithmetic operations in datetime use

Answer 22

timedelta

Question 23

to work with timezones in datetime objects use

Answer 23

pytz library

Question 24

are named locations on disk to store related information

Answer 24

Files

Question 25

store the data in the form of characters.

Answer 25

Text files

Question 26

store entire data in the form of bytes.

Answer 26

Binary files

Question 27

are generally available in .jpg, .gif or .png formats.

Answer 27

Image files

Question 28

CRUD meaning

Answer 28

Creat read update delete

Question 29

we use _________ function to open a file

Answer 29

open()

Question 30

represents a temporary block of memory

Answer 30

buffer

Question 31

What does w open mode does?

Answer 31

Write data into file

Question 32

What does "r" does

Answer 32

Read data from the file

Question 33

What does a does?

Answer 33

append data to the file?

Question 34

What does w+ do?

Answer 34

to write and read data of a file

Question 35

What does r+ do?

Answer 35

To read and write data into file

Question 36

What does a+ do?

Answer 36

To append and read data of file.

Question 37

What does x do?

Answer 37

open file in exclusing creation mode.

Question 38

To close a file use __________

Answer 38

close()

Question 39

closing is mandatory T or F

Answer 39

True

Question 40

When a file is not closed a problem will lead to

Answer 40

insufficient memory.

Question 41

to create a fille use

Answer 41

open() method

Question 42

to create a new file which parameters do you need?

Answer 42

x a W

Question 43

TO read data from text file use

Answer 43

read()

Question 44

the____________ method returns a list of remaining lines of the entire file

Answer 44

readlines()

Question 45

To delete you much import

Answer 45

the os module and run the os.remove() function

Question 46

to know the current directory

Answer 46

os.getcwd()

Question 47

to make a sub directory

Answer 47

os.mkdir('mysub')

Question 48

to change directory

Answer 48

os.chdir()

Question 49

to rmeove directory

Answer 49

os.rmdir()

Question 50

to rename directory

Answer 50

os.rename()

Question 51

what is the error if not found using os.chdir()

Answer 51

FileNotFoundError

Question 52

What happens when you delete a directory that has something inside of it

Answer 52

OSERROR

Question 53

What does csv mean?

Answer 53

Comma separated Value

Question 54

Do you need to import a csv file to use it? T or F

Answer 54

T

Question 55

how to read in csv

Answer 55

csv.reader()

Question 56

How to write in csv

Answer 56

csv.writer()

Question 57

how to write a row of data in csv

Answer 57

writerow()

Question 58

disrupts the flow of instructions

Answer 58

exception

Question 59

this is optional and is used for code that needs to be executed regardless of whether an exception occurred or not

Answer 59

Finally

Question 60

you can raise exceptions using the

Answer 60

raise statement