Introduction to Computing MCQs with Answers
Practice important Introduction to Computing MCQs with answers and explanations.
Chapter: 83
Q1201:
What is the primary purpose of encryption in network security?
A. To speed up data transmission
B. To hide the origin of data
C. To protect data confidentiality
D. To reduce data size
Correct Answer:
C
Chapter: 83
Q1202:
Which encryption algorithm is widely known for being symmetric?
A. RSA
B. AES
C. ECC
D. DSA
Correct Answer:
B
Chapter: 83
Q1203:
In asymmetric encryption, what is used to decrypt the data?
A. Private key
B. Public key
C. Hash
D. Plaintext
Correct Answer:
A
Chapter: 83
Q1204:
What type of encryption uses the same key for both encryption and decryption?
A. Asymmetric
B. Symmetric
C. Public-key
D. Hashing
Correct Answer:
B
Chapter: 83
Q1205:
Which of the following is an example of asymmetric encryption?
A. DES
B. AES
C. RSA
D. SHA-256
Correct Answer:
C
Chapter: 83
Q1206:
What does the term "plaintext" refer to in encryption?
A. Encrypted data
B. Compressed data
C. Unencrypted data
D. Encoded data
Correct Answer:
C
Chapter: 83
Q1207:
Which key size is typically stronger in encryption algorithms?
A. 128-bit
B. 64-bit
C. 256-bit
D. 512-bit
Correct Answer:
D
Chapter: 83
Q1208:
What is the main advantage of using asymmetric encryption over symmetric encryption?
A. Faster processing
B. Simpler implementation
C. Stronger security
D. Easier key management
Correct Answer:
C
Chapter: 83
Q1209:
In encryption, what is a "cipher"?
A. The original message
B. The encrypted message
C. The key used for encryption
D. The algorithm used to encrypt data
Correct Answer:
D
Chapter: 83
Q1210:
Which encryption method is most suitable for encrypting large amounts of data?
A. Asymmetric
B. Symmetric
C. Public-key
D. Hashing
Correct Answer:
B
Chapter: 83
Q1211:
What does RSA stand for in the context of encryption?
A. Random Symmetric Algorithm
B. Rivest-Shamir-Adleman
C. Robust Security Algorithm
D. Reliable Secure Authentication
Correct Answer:
B
Chapter: 83
Q1212:
What is the role of a digital certificate in encryption?
A. To encrypt the data
B. To verify the identity of the sender
C. To compress data
D. To generate keys
Correct Answer:
B
Chapter: 83
Q1213:
Which hashing algorithm is commonly used in digital signatures?
A. RSA
B. AES
C. SHA-256
D. DES
Correct Answer:
C
Chapter: 83
Q1214:
What is "hashing" in the context of cryptography?
A. A process to decrypt data
B. A process to compress data
C. A process to verify data integrity
D. A process to encrypt data
Correct Answer:
C
Chapter: 83
Q1215:
Which of the following is a disadvantage of symmetric encryption?
A. Requires more processing power
B. Requires multiple keys
C. Less secure key management
D. Slower than asymmetric encryption
Correct Answer:
C
Chapter: 83
Q1216:
What is the purpose of a public key in asymmetric encryption?
A. To encrypt data
B. To decrypt data
C. To generate a digital signature
D. To compress data
Correct Answer:
A
Chapter: 83
Q1217:
How does symmetric encryption differ from asymmetric encryption?
A. Uses two keys for encryption
B. Uses the same key for encryption and decryption
C. Is slower than asymmetric encryption
D. Provides better security than asymmetric encryption
Correct Answer:
B
Chapter: 83
Q1218:
Which algorithm is known for its use in secure web communications (e.g., HTTPS)?
A. AES
B. RSA
C. DES
D. Blowfish
Correct Answer:
B
Chapter: 83
Q1219:
What is the term for converting ciphertext back into plaintext?
A. Encrypting
B. Hashing
C. Decrypting
D. Compressing
Correct Answer:
C
Chapter: 83
Q1220:
Which of the following is true about a digital signature?
A. It encrypts the message
B. It verifies the sender's identity
C. It compresses the message
D. It replaces the public key
Correct Answer:
B