Answer:
Required code is given below:
Explanation:
def add_to_dict(dictt, key,value):
if key in dictt.keys():
print("Error. Key already exists.")
else:
dictt[key]=value
return dictt
def remove_from_dict(dictt,key):
try:
dictt[key]
dictt.pop(key, None)
return dictt
except KeyError:
print("No such key exists in the dictionary.")
def find_key(dictt,key):
try:
value=dictt[key]
print("Value: ", value)
except KeyError:
print("Key not found.")
Answer:
SELECT column_1, column_2, ... column_n
FROM table_name_1
JOIN table_name_2 ON table_name_1.primaryColumn = table_name_2.foreignKeyColumn
AND table_name_3 ON table_name_1.primaryColumn = table_name_3.foreignKeyColumn
Explanation:
The SQL or structured query language statement returns information from the three tables in the database with the 'select' and 'join' clause in the statement. There are several types of join but the default is the inner join. Other types of join are; outer, left and right join.
Answer:
Grace Hopper.
Explanation:
Grace Hopper was a US Naval Rear Admiral and an American computer scientist who was born on the 9th of December, 1906 in New York city, United States of America. She worked on the first commercial computer known as universal automatic computer (UNIVAC), after the second World War II.
In 1953 at the Remington Rand, Grace Hopper invented the first high-level programming language for UNIVAC 1 by using words and expressions.
Hence, Grace Hopper was the Navy Admiral who invented a high-level programming language FLOW-MATIC in 1953.
Additionally, FLOW-MATIC paved the way for the development of common business-oriented language (COBOL).
Answer:
RSI stands for repeating similar movements
Answer:
When that information gets posted online, it is no longer private, and may end up falling into wrong hands. Even if you have put in place the highest possible security measures, some of your friends, colleagues and companies you interact with on social media, can end up leaking your personal information.
