Explore topic-wise MCQs in Microprocessors.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Microprocessors knowledge and support exam preparation. Choose a topic below to get started.

1.

THE_SIGNALS_THAT_ARE_PROVIDED_TO_MAINTAIN_PROPER_DATA_FLOW_AND_SYNCHRONIZATION_BETWEEN_THE_DATA_TRANSMITTER_AND_RECEIVER_ARE?$

A. handshaking signals
B. control signals
C. input signals
D. none
Answer» B. control signals
Discussion
2.

The_feature_of_mode_2_of_8255_is$

A. single 8-bit port is available
B. both inputs and outputs are latched
C. port C is used for generating handshake signals
D. all of the mentioned
Answer» E.
Discussion
3.

The level of the signal ERROR(active low) becomes ‘low’ when the printer is i?#

A. Paper end state
B. Offline state
C. Error state
D. All of the mentioned
Answer» E.
Discussion
4.

The pulse width of the signal INIT at the receiving terminal must be more than

A. 10 microseconds
B. 20 microseconds
C. 40 microseconds
D. 50 microseconds
Answer» E.
Discussion
5.

The signal, SLCT in the direction of signal flow, OUT, indicates the selection of

A. Control word register
B. CPU
C. Printer
D. Ports
Answer» D. Ports
Discussion
6.

If the value of the pin STB (Strobe Input) falls to low level, then

A. input port is loaded into input latches
B. input port is loaded into output latches
C. output port is loaded into input latches
D. output port is loaded into output latches
Answer» B. input port is loaded into output latches
Discussion
7.

The strobed input/output mode is another name of

A. mode 0
B. mode 1
C. mode 2
D. none
Answer» C. mode 2
Discussion
8.

The feature of mode 0 is

A. any port can be used as input or output
B. output ports are latched
C. maximum of 4 ports are available
D. all of the mentioned
Answer» E.
Discussion
9.

In BSR mode, only port C can be used to

A. set individual ports
B. reset individual ports
C. set and reset individual ports
D. programmable I/O ports
Answer» D. programmable I/O ports
Discussion
10.

In the I/O mode, the 8255 ports work as

A. reset pins
B. set pins
C. programmable I/O ports
D. only output ports
Answer» D. only output ports
Discussion