Answer: Strong 128-bit encryption.
Explanation: An individual character corresponds to 8 bits . So if there are 16 characters then,
16
8=128 bits keys
This makes the 128 bit key encryption the strongest amongst all other options.It is strongest because it is almost impossible to decode the 128-character key by any method e.g.-brute-force method.
Other options are incorrect because the characters given by the other bits are as follows: 
=32 characters
=64 characters
=128 characters
Thus, the strongest character key is of 128 bits. for cipher.
Answer:
35
Explanation:
We will be going inside B array, because he was in second place in array E,and will be the first element of array B, so it's 35
E can be understanded as:
E=[[21, 'dog', 'red'],[35, 'cat', 'blue'],[12, 'fish', 'green']], so, you can see array E as array of arrays or so-called two-dimensional array
QR codes make up the basic structure of a relational database with columns containing field data and rows containing record information.
Answer:
Boolean
Explanation:
Boolean is one of the primitive data types that will only hold either true or false value. This data type is commonly used in a variable that will track a status with only two possible outcomes.
For example, the<em> ParticipantPD</em> field is to track the payment status (paid or unpaid) of a participant. So, declare the<em> ParticipantPD</em> field as boolean data type will meet its purpose.
boolean ParticipantPD = true;
or
boolean ParticipantPD = false;
I think it’s B if not it’s D both are similar
