1. What technique is used for error detection and correction in the data link layer?
a) Framing
b) Block coding
c) Flow control
d) Checksum

2. Which of the following is an example of a linear block code?
a) CRC
b) Hamming code
c) Parity bit
d) Cyclic redundancy check

3. HDLC stands for:
a) High Data Link Control
b) High Definition Link Control
c) High-Level Data Link Control
d) Hyper Data Link Control

4. Which protocol is commonly used for synchronous communication over serial links?
a) TCP
b) IP
c) HDLC
d) UDP

5. What is the primary function of framing in the data link layer?
a) Error correction

b) Error detection
c) Segmentation
d) Flow control