Python

Question 1

Modulus

Answer 1

is the remainder of the division of the left operand and the right operand,returns the decimal part (remainder) of the quotient.

Question 2

Float

Answer 2

is a term is used in various programming languages to define a variable with a fractional value. Numbers created using a float variable declaration will have digits on both sides of a decimal point.
This is in contrast to the integer data type, which houses an integer or whole number

Question 3

Variable

Answer 3

is a reserved memory location to store values,it gives data to the computer for processing

Question 4

len()

Answer 4

is an inbuilt function in Python programming language that returns the length of the string.
Return Value: It returns an integer which is the length of the string.

Question 5

format()

Answer 5

is one of the string formatting methods that which allows multiple substitutions and value formatting. This method lets us concatenate elements within a string through positional formatting.

Question 6

Strings

Answer 6

are arrays of bytes representing Unicode characters. However, Python does not have a character data type, a single character is simply a string with a length of 1. Square brackets can be used to access elements of the string

Question 7

Dictionary

Answer 7

is a data structure that maps one value to another,kind of like how an English dictionary maps a word to its definition.
{ } are used for embedding variables

Question 8

Boolean Strings

Answer 8

A string in Python can be tested for truth value.

The return type will be in Boolean value (True or False)

Question 9

end= ‘ ‘

Answer 9

Python’s print() function comes with a parameter called ‘end’. By default, the value of this parameter is ‘\n’, i.e. the new line character. You can end a print statement with any character/string using this parameter.

Question 10

Triple quotes

Answer 10

are treated as regular strings with the exception that they can span multiple lines

Question 11

print “\”

Answer 11

Prints Backslash

Question 12

print “'”

Answer 12

Prints Single-Quote

Question 13

print “"”

Answer 13

Prints double quote

Question 14

print “\a”

Answer 14

ASCII bell makes ringing the bell alert sounds

example.xterm

Question 15

print “hello\fworld”

Answer 15

ASCII form-feed ( FF )
hello
world

Question 16

print “hello\nworld”

Answer 16

ASCII linefeed ( LF )

Question 17

print “\t* hello”

Answer 17

ASCII horizontal TAB

Question 18

print u”\u041b

Answer 18

Prints 16-bit hex value Unicode character

Question 19

print u”\U000001a9”

Answer 19

Prints 32-bit hex value Unicode character

Question 20

print “\043”

Answer 20

Prints character based on its octal value

Question 21

print “\x23”

Answer 21

Prints character based on its hex value

LinuxConfig.org

Question 22

print(“How old are you?”, end=’’)

age = input()

Answer 22

end=’’ allows to give input on the same line

Question 23

argv

Answer 23

are called features that are called “Modules” that we import like (import sys module),these are also called libraries by programmers

Question 24

print(“*” * 10)

Question 25

Text files

Answer 25

In this type of file, Each line of text is terminated with a special character called EOL (End of Line), which is the new line character (‘\n’) in python by default.

Question 26

Binary files

Answer 26

In this type of file, there is no terminator for a line and the data is stored after converting it into machine understandable binary language.

Question 27

File handle

Answer 27

is like a cursor, which defines from where the data has to be read or written in the file. There are 6 access modes in python.

Question 28

Read Only (‘r’)

Answer 28

Open text file for reading. The handle is positioned at the beginning of the file. If the file does not exists, raises I/O error. This is also the default mode in which file is opened.

Question 29

Read and Write (‘r+’)

Answer 29

Open the file for reading and writing. The handle is positioned at the beginning of the file. Raises I/O error if the file does not exists.

Question 30

Write Only (‘w’)

Answer 30

Open the file for writing. For existing file, the data is truncated and over-written. The handle is positioned at the beginning of the file. Creates the file if the file does not exists.

Question 31

Write and Read (‘w+’)

Answer 31

Open the file for reading and writing. For existing file, data is truncated and over-written. The handle is positioned at the beginning of the file.

Question 32

Append Only (‘a’)

Answer 32

Open the file for writing. The file is created if it does not exist. The handle is positioned at the end of the file. The data being written will be inserted at the end, after the existing data.

Question 33

Append and Read (‘a+’)

Answer 33

Open the file for reading and writing. The file is created if it does not exist. The handle is positioned at the end of the file. The data being written will be inserted at the end, after the existing data.

Question 34

open( )

Answer 34

File_object = open(r"File_Name","Access_Mode")

Question 35

close( )

Answer 35

``` function closes the file and frees the memory space acquired by that file. It is used at the time when the file is no longer needed or if it is to be opened in a different file mode. File_object.close() ```

Question 36

write( )

Answer 36

Inserts the string str1 in a single line in the text file. | File_object.write(str1)

Question 37

writelines( )

Answer 37

For a list of string elements, each string is inserted in the text file.Used to insert multiple strings at a single time. File_object.writelines(L) for L = [str1, str2, str3]

Question 38

read( )

Answer 38

Returns the read bytes in form of a string. Reads n bytes, if no n specified, reads the entire file. File_object.read([n])

Question 39

readline( )

Answer 39

Reads a line of the file and returns in form of a string.For specified n, reads at most n bytes. However, does not reads more than one line, even if n exceeds the length of the line. File_object.readline([n])

Question 40

readlines( )

Answer 40

Reads all the lines and return them as each line a string element in a list. File_object.readlines( )

Question 41

truncate( )

Answer 41

method resizes the file to the given number of bytes. | If the size is not specified, the current position will be used.

Question 42

*args

Answer 42

* asterisk takes all args to the function alike "argv"

Question 43

int( )

Answer 43

function in Python and Python3 converts a number in given base to decimal.

Question 44

Global variables

Answer 44

are the one that are defined and declared outside a function and we need to use them inside a function.

Question 45

Local variable

Answer 45

is variable declared inside the function's body or in the local scope

Question 46

f.seek(0)

Answer 46

seek() deals in bytes and not in lines... fp.seek(offset, from_what)... where fp is the file pointer you're working with; offset means how many positions you will move; from_what defines your point of reference: 0: means your reference point is the beginning of the file 1: means your reference point is the current file position 2: means your reference point is the end of the file if omitted, from_what defaults to 0.

Question 47

+=

Answer 47

#The expression a += b is shorthand for a = a + b , where a and b can be numbers, or strings, or tuples, or lists (but both must be of the same type).