Answer:
A. One
Explanation:
Symmetric key cryptography makes use of one key. The same key is used for both encryption and decryption. This is different from asymmetric cryptography where separate keys are used for the two operations. Some examples of symmetric cryptography include:
- Advanced Encryption Standard (AES)
- Data Encryption Standard (DES)
- Triple Data Encryption Standard (3DES)
Answer: d. incremental backup
Explanation:
In incremental backup it copies only the files that have changed since the last full backup. It does not backup all the files just like the full backup. it however backup those copies into the system which has changed since the last backup.
In doing so it just increases the efficiency and performance of the backup procedure. This process is basically preferred when the amount of file to be backup is huge and there is not enough time to do a full backup.
Increment backup also use less disk space.
Cloud backup uses most increment backup for its application.
No, development and conservation of environment cannot hand in hand.
Explanation:
Because during the developmental process the destruction of the environment is necessary.For example,if you want to construct a Road which is one of the developmental activity,so to construct road the clear of forest is must .
