Answer:
Interfaces are way to use full abstraction.That;s why it is preffered over implementations.
Interfaces are just like class.But the methods declared inside an abstract class are by default abstract and the variables are by default static,final.Which is not the case with classes in classes the variables can be static or non- static ,fincal or non-final and methods can be abstract or non-abstract.
Java classes does not support multiple inheritance but interfaces support multiple inheritance.So whenever we want to implement multiple inheritance in Java we use interfaces.
Answer:
Like all hackers, black hat hackers usually have extensive knowledge about breaking into computer networks and bypassing security protocols. They are also responsible for writing malware, which is a method used to gain access to these systems.
Explanation:
that's all. c:
Answer:
The correct answer is Option(A) i.e., An SQL injection attack is being
attempted.
Explanation:
In this given question some information is missing and is not the complete question. The missing is given as :
SELECT * FROM and ‘1’ = ‘1’
Which of the following can the security administrator determine from this?
A. The SQL injection attacked is being attempted.
B. An Legitimated connections is being dropped.
C. The network scan are being done by the system.
D. An attack of XSS is being attempted.
Now, coming to the answer "The security administration sees that an SQL injection is attempted while it notices a lot of connection dropped and has replaced with the firewall and will be the possible issue flagged on it, SQL injection is a type of injection that possibly executes harmful or malicious statements and effects any website or web application".
Hence the correct answer is Option A.
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:
Because of refraction.
Explanation:
Light coming from fish passes through two medium, one is water and another is air. As the density of medium is changing from high to low, the light bends away from the normal. So to the human eyes, the fish appears to be above its actual position.
