Encoding, Encryption, and Hashing

1. What is the primary purpose of encoding?

   • A) To secure data from unauthorized access
   • B) To transform data into an unreadable format
   • C) To represent data in a different format, often for obfuscation or compression
   • D) To verify the integrity of data

2. Which of the following is NOT a type of encoding?

   • A) Base64 Encoding
   • B) URL Encoding
   • C) SHA-2 Encoding
   • D) UTF-8 Encoding

3. What is the main characteristic of symmetric encryption?

   • A) It uses two different keys for encryption and decryption
   • B) It uses the same key for both encryption and decryption
   • C) It converts data into a fixed-length hash
   • D) It is used to compress data

4. Which encryption method uses a public key for encryption and a private key for decryption?

   • A) Symmetric Encryption
   • B) Asymmetric Encryption
   • C) MD5 Encryption
   • D) Base64 Encryption

5. Which of the following is a common algorithm used in symmetric encryption?

   • A) RSA
   • B) MD5
   • C) AES
   • D) SHA-3

6. What is the purpose of hashing?

   • A) To convert binary data into ASCII characters
   • B) To encrypt data so that it is unreadable without a key
   • C) To generate a fixed-length output for data verification and secure password storage
   • D) To compress data for more efficient storage

7. Which hashing algorithm generates a 128-bit hash value?

   • A) SHA-1
   • B) SHA-3
   • C) MD5
   • D) SHA-2

8. What does a hash function do with data?

   • A) Converts it into a format that is readable by humans
   • B) Encrypts it using a secret key
   • C) Generates a fixed-length output that represents the original data
   • D) Obfuscates it for data compression

9. Which type of encryption is considered more secure due to the use of two different keys?

   • A) Symmetric Encryption
   • B) Asymmetric Encryption
   • C) Base64 Encoding
   • D) URL Encoding

10. Which of the following is NOT a hashing algorithm mentioned in the text?

    • A) MD5
    • B) SHA-1
    • C) AES
    • D) BCrypt

Answers:

1. C) To represent data in a different format, often for obfuscation or compression
2. C) SHA-2 Encoding
3. B) It uses the same key for both encryption and decryption
4. B) Asymmetric Encryption
5. C) AES
6. C) To generate a fixed-length output for data verification and secure password storage
7. C) MD5
8. C) Generates a fixed-length output that represents the original data
9. B) Asymmetric Encryption
10. C) AES