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WorksheetsMCA Quiz 1
Total questions: 22
Worksheet time: 7mins
Name
Class
Date
1.
Name:
4 lines
2.
Register No.:
4 lines
3.
Which of the following companies manufactures 8051 microcontrollers?
a)
Atmel
b)
Philips
c)
Intel
d)
All of the mentioned
4.
8051 is a ______________ bit microcontroller
a)
8
b)
16
c)
13
d)
4
5.
If an interrupt is generated from hardware, then it is an
a)
internal interrupt
b)
external interrupt
c)
interrupt
d)
none of the mentioned
6.
If the interrupt is generated by the execution of an interrupt instruction then it is
a)
internal interrupt
b)
external interrupt
c)
interrupt-in-interrupt
d)
none of the mentioned
7.
RAM holds __________ bytes of storage in 8051.
a)
28KB
b)
128 KB
c)
4 KB
d)
12 KB
8.
How are the status of the carry, auxiliary carry and parity flag affected if the write instruction
MOV A,#9C ADD A,#64H
a)
CY=0, AC=0, P=0
b)
CY=1, AC=1, P=0
c)
CY=0, AC=1, P=0
d)
CY=1, AC=1, P=1
9.
If we push data onto the stack then the stack pointer
a)
increases with every push
b)
decreases with every push
c)
increases & decreases with every push
d)
none of the mentioned
10.
The type of the interrupt may be passed to the interrupt structure of CPU from
a)
interrupt service routine
b)
stack
c)
interrupt controller
d)
none of the mentioned
11.
How many bytes of bit addressable memory is present in 8051 based microcontrollers?
a)
8 bytes
b)
32 bytes
c)
16 bytes
d)
128 bytes
12.
No of address lines in 8051
a)
8
b)
16
c)
20
d)
None of the mentioned
13.
The number of 16-bit timers in 8051 are __________
a)
2
b)
3
c)
4
d)
5
14.
PSEN stands for
a)
Program Store Enable
b)
Point store enable
c)
Plaint store enable
d)
None
15.
EA stands for
a)
External amplifier
b)
External amplitude
c)
External access input
d)
None of these
16.
DPL of the data point register holds ____ byte of data.
a)
lower
b)
higher
c)
16
d)
8
17.
INC operand defines the __________ operation
a)
Read
b)
Write
c)
Increment
d)
Decrement
18.
CLR bit in 8051 _____ the specified bits
a)
Moves
b)
Transfers
c)
Clears
d)
Sets
19.
CJNE defines _____the operand and it jumps to the system.
a)
Move
b)
Add
c)
Compare
d)
Subtract
20.
What is the meaning of the instruction MOV A,05H?
a)
data 05H is stored in the accumulator
b)
fifth bit of accumulator is set to one
c)
address 05H is stored in the accumulator
d)
none of the mentioned
21.
Which of the ports act as the 16 bit address lines for transferring data through it?
a)
PORT 0 and PORT 1
b)
PORT 1 and PORT 2
c)
PORT 0 and PORT 2
d)
PORT 1 and PORT 3
22.
Which instruction is used to check the status of a single bit?
a)
MOV A,P0
b)
ADD A,#05H
c)
JNB PO.0, label
d)
CLR P0.05H
Reset
