100+ AMBA Bus Architecture MCQs with Answers

The Advanced Microcontroller Bus Architecture (AMBA) is a widely adopted on-chip communication standard developed by Arm Holdings. It plays a crucial role in modern System-on-Chip (SoC) designs by enabling efficient communication between processors, memory, and peripheral devices. AMBA protocols such as AHB (Advanced High-performance Bus), APB (Advanced Peripheral Bus), and AXI (Advanced eXtensible Interface) are fundamental building blocks in embedded systems, consumer electronics, and high-performance computing platforms.

Understanding AMBA architecture is essential for students and professionals working in embedded systems, VLSI design, and SoC development, as it forms the backbone of data transfer mechanisms within integrated circuits. However, mastering these concepts requires not only theoretical knowledge but also strong problem-solving skills.

To help you test and strengthen your understanding, this article provides a comprehensive set of AMBA Bus Architecture Multiple Choice Questions (MCQs). These questions are carefully designed to cover basic, intermediate, and advanced concepts, including bus protocols, signal operations, data transfer mechanisms, arbitration techniques, and real-world applications.

Whether you are preparing for engineering exams, competitive tests, or technical interviews, these MCQs will help you:

Evaluate your conceptual clarity.
Identify knowledge gaps.
Improve accuracy and speed.
Gain confidence in AMBA-based topics.

Let’s dive into the questions and enhance your understanding of AMBA bus architecture in a structured and engaging way.

1). What does AMBA stand for?

Advanced Microprocessor Bus Architecture

Advanced Bus Architecture

Automated Memory Bus Architecture

Advanced Machine Bus Architecture

2). AMBA was developed by which company?

Intel

AMD

ARM

Qualcomm

3). Which AMBA bus is used for high-performance systems?

APB

AHB

AXI

ASB

4). Which AMBA bus is used for low-power peripherals?

AXI

AHB

APB

ACE

5). Which bus supports pipelining

APB

AHB

Both AHB and AXI

None

6). How many channels are in AXI protocol?

7). Which AXI channel handles write response?

8). Which bus does NOT support burst transfer?

AXI

AHB

APB

ACE

9). Which AMBA bus is simplest?

AXI

AHB

APB

CHI

10). Which bus supports out-of-order transactions?

AHB

APB

AXI

ASB

11). AHB stands for?

Advanced High Bus

Advanced High-performance Bus

Automated High Bus

Advanced Hardware Bus

12). APB uses how many phases?

13). AXI is part of which AMBA version?

AMBA 1

AMBA 2

AMBA 3

AMBA 5

14). Which signal indicates write in APB?

PADDR

PWRITE

PENABLE

PRDATA

15). Which bus uses arbitration?

APB

AHB

Both AXI & AHB

None

16). Which AXI channel carries read data?

17). Which bus is best for UART?

AXI

AHB

APB

ACE

18). Which bus is used as system backbone?

APB

AHB

AXI

Both B & C

19). Which AMBA protocol supports separate read/write channels?

AHB

APB

AXI

ASB

20). Which bus consumes lowest power?

AHB

APB

CHI

21). Burst transfer improves?

Power

Speed

Cost

Area

22). AXI supports?

Single transfer

Burst transfer

Both

None

23). AHB operates on?

Dual edge

Single edge

Async

None

24). APB is used for?

CPU

Memory

Peripherals

GPU

25). AXI reduces?

Power

Latency

Cost

Area

AMBA Bus Architecture MCQs for Exams

26). What is the full form of AXI?

Advanced External Interface

Advanced extensible Interface

Automated exchange Interface

Advanced Execution Interface

27). Which feature is supported by AXI but not by AHB?

Burst transfer

Pipelining

Out-of-order transactions

Single transfer

28). Which bus is most suitable for battery-powered devices?

AXI

AHB

APB

ACE

29). Which AMBA bus uses a shared bus architecture?

AXI

AHB

APB

CHI

30). Which bus uses interconnect instead of a shared bus?

AHB

APB

AXI

ASB

31). Which AXI channel is used for write address?

32). Which AXI channel is used for write data?

33). Which AXI channel is used for read address?

34). Which AXI channel carries read response data?

35). Which signal is used to enable APB transfer?

PWRITE

PENABLE

PADDR

PRDATA

36). Which component decides bus access in AHB?

Decoder

Arbiter

Master

Slave

37). Which component selects the slave device in AHB?

Arbiter

Decoder

Master

Bridge

38). Which AMBA bus is used for connecting high-speed memory?

APB

AHB

AXI

ASB

39). Which bus is best for GPIO communication?

AXI

AHB

APB

ACE

40). Which transfer type wraps around address boundaries?

Single transfer

Incremental burst

Wrapping burst

Fixed burst

41). Which protocol supports multiple outstanding transactions?

APB

AHB

AXI

42). Which bus has the highest throughput?

APB

AHB

AXI

ASB

43). Which bus has no pipelining?

AXI

AHB

APB

ACE

44). Which AMBA protocol is best for AI accelerators?

APB

AHB

AXI

ASB

45). Which bus is used for timer modules?

AXI

AHB

APB

ACE

46) Which bus requires arbitration logic?

APB

AHB

AXI

Both B and C

47). Which AMBA protocol supports Quality of Service (QoS)?

APB

AHB

AXI

ASB

48). Which bus is least complex?

AXI

AHB

APB

CHI

49). Which bus is used as a bridge between high-speed and low-speed buses?

AXI

AHB

APB

AHB/APB Bridge

50). Which AMBA protocol is most scalable?

APB

AHB

AXI

ASB

AMBA Bus Architecture MCQs for Quiz

51). Which AMBA protocol is mainly used in modern SoC designs?

APB

AHB

AXI

ASB

52). Which type of burst transfer increases address sequentially?

Fixed burst

Wrapping burst

Incremental burst

Single transfer

53). Which AXI feature allows multiple transactions to be processed simultaneously?

Pipelining

Burst transfer

Multiple outstanding transactions

Single transfer

54). Which bus uses a two-phase transfer mechanism?

AXI

AHB

APB

ACE

55). Which signal carries address in APB?

PWRITE

PADDR

PRDATA

PENABLE

56). Which AMBA protocol is designed for simplicity?

AXI

AHB

APB

CHI

57). Which AXI channel is responsible for write acknowledgment?

58). Which bus supports highest data bandwidth?

APB

AHB

AXI

ASB

59). Which AMBA protocol supports pipelined operations?

APB

AHB

AXI

Both B and C

60). Which bus is NOT suitable for high-speed data transfer?

AXI

AHB

APB

ACE

61). Which component initiates a transfer in AHB?

Slave

Arbiter

Master

Decoder

62). Which protocol supports split transactions?

APB

AHB

AXI

Both B and C

63). Which AMBA protocol is best for cache-based systems?

APB

AHB

AXI

ASB

64). Which bus uses PENABLE signal?

AXI

AHB

APB

ACE

65). Which bus does NOT require an arbiter?

AXI

AHB

APB

Both A and B

66). Which bus is used in DMA controllers?

APB

AHB

AXI

Both B and C

67). Which feature reduces latency in AXI?

Shared bus

Parallel channels

Two-phase transfer

Single master

68). Which AMBA protocol is least scalable?

AXI

AHB

APB

CHI

69). Which bus supports address pipelining?

APB

AHB

AXI

Both B and C

70). Which bus is typically used in microcontrollers?

AXI

AHB

APB

Both B and C

71). Which AXI channel handles read requests?

72). Which AXI channel carries write data?

73). Which AMBA bus consumes moderate power?

AXI B

AHB

APB

Both A and

74). Which protocol is used in high-end GPUs?

APB

AHB

AXI

ASB

75). Which bus improves system modularity?

AXI

AHB

APB

All of the above

AMBA Bus Architecture MCQs for Interviews

76). Which AMBA protocol provides the highest scalability for complex SoCs?

APB

AHB

AXI

ASB

77). Which feature of AXI allows better utilization of bus bandwidth?

Single transfer

Blocking transactions

Out-of-order execution

Two-phase transfer

78). Which AMBA protocol is typically used for register access?

AXI

AHB

APB

ACE

79). Which AHB signal indicates transfer type?

HADDR

HTRANS

HWRITE

HREADY

80). Which AHB signal indicates write operation?

HADDR

HTRANS

HWRITE

HREADY

81). Which AMBA protocol uses separate address and data phases?

APB

AHB

AXI

Both B and C

82). Which AMBA protocol is best suited for simple control signals?

AXI

AHB

APB

CHI

83). Which bus introduces the concept of transaction IDs?

APB

AHB

AXI

ASB

84). Which AMBA protocol is least suitable for high-frequency operation?

AXI

AHB

APB

ACE

85). Which component connects AHB/AXI to APB?

Arbiter

Decoder

Bridge

Master

86). Which feature helps AXI achieve low latency?

Shared bus

Sequential execution

Parallel channels

Single master

87). Which bus is ideal for ADC communication?

AXI

AHB

APB

ACE

88). Which AMBA protocol is commonly used in FPGA designs?

APB

AHB

AXI

All of the above

89). Which AHB signal indicates transfer completion?

HREADY

HRESP

HWRITE

HADDR

90). Which AMBA protocol supports cache coherency (with extensions)?

AHB

AXI

ACE

91). Which bus uses minimal control signals?

AXI

AHB

APB

CHI

92). Which AMBA protocol is used in high-speed networking chips?

APB

AHB

AXI

ASB

93). Which AMBA bus supports multi-master architecture?

APB

AHB

AXI

Both B and C

94). Which protocol is easiest to implement?

AXI

AHB

APB

CHI

95). Which bus is used for high-speed memory access?

APB

AHB

AXI

ASB

96). Which feature increases throughput in AXI?

Single transfer

Blocking

Burst transfer

Two-phase transfer

97). Which AMBA protocol supports full-duplex communication?

APB

AHB

AXI

ASB

98). Which bus is typically used in simple microcontroller peripherals?

AXI

AHB

APB

ACE

99). Which AMBA protocol reduces system bottlenecks?

APB

AHB

AXI

ASB

100). Which AMBA protocol is best for future scalable architectures?

APB

AHB

AXI

ASB