Programming

Question 1

Arithmetic operations

Answer 1

• subtraction = a-b
• multiplication = a*b
• real/float division = a/b
• integer division, including remainders = a//b a%b
• exponentiation = a**b
• rounding = round(number, digits)
• truncation = file.truncate(size)

Question 2

Boolean operations

Answer 2

• NOT
• AND
• OR
• XOR

Question 3

Relational operators

Answer 3

• equal to = a==b
• not equal to = a!=b
• less than = a<b
• greater than = a>b
• less than or equal to = a<=b
• greater than or equal to = a>=b

Question 4

The difference between a variable and a constant

Answer 4

Variables values can be changed and updated., whereas constants values cannot be changed or updated

Question 5

Advantages of using named constants

Answer 5

-make the code easier to understand and modify
-reduce errors from unexplained numerical values
-allow for faster and more efficient code execution due to compiler optimization

Question 6

String handling operations

Answer 6

• length = len(string)
• pos of char/ss = string.index(substring)
• character at position = string[x]
• substring = string[x:y]
• concatenation =(a,b = “a b”) (a+b = “ab”)
• character → character code = ord(character)
• character code → character = chr(char code)

Question 7

String conversion operations

Answer 7

• string to integer = int(string)
• string to float = float(string)
• integer to string = str(integer)
• float to string = str(float)
• date/time to string = strftime()
• string to date/time = datetime.strptime(date_string, format)

Question 8

Random number generation

Answer 8

import random
* random number = random.randint(x,y)