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paper of 8051 c .

Exam section of megasasta.com

Paper of c in 8051

Course=8051
Subject=c

Question no-1
General purpose RAM available in ds1307 for 8051


Optional Answers

(a)                  1Mbyte

(b)                  2Mbyte

(c)                  56Bytes

(d)                  256Bytes

Sollution

(c)                  56Bytes

Question no-2
Crystal frequency required in DS1307 is


Optional Answers

(a)                  13.876Khz

(b)                  13.768Khz

(c)                  13.5KHz

(d)                  13.768Mhz

Sollution

(b)                  13.768Khz

Question no-3
Priority of hardware interrupt in 8051 is set by SFR


Optional Answers

(a)                  SBUF

(b)                  SCON

(c)                  PCON

(d)                  IP

Sollution

(d)                  IP

Question no-4
24C02 having


Optional Answers

(a)                  56 Bytes of memory

(b)                  volatile memory

(c)                  non volatile memory

(d)                  RAM

Sollution

(c)                  non volatile memory

Question no-5
UART in 8051 divides clock by


Optional Answers

(a)                  2

(b)                  8

(c)                  16

(d)                  32

Sollution

(d)                  32

Question no-6
output on P0 in below code of 8051 if a=220

if(a&0x80)
P0=0x55;
else
P0=0xaa;


Optional Answers

(a)                  0xFF

(b)                  0x00

(c)                  0x55

(d)                  0x20

Sollution

(c)                  0x55

Question no-7
Special function associated with P3.3 of 8051 is


Optional Answers

(a)                  Interrupt 1 of 8051

(b)                  Serial port of 8051

(c)                  SBUF of 8051

(d)                  none of the above

Sollution

(a)                  Interrupt 1 of 8051

Question no-8
0x06 command in 16x2 LCD stands for


Optional Answers

(a)                  Display on

(b)                  Right shift

(c)                  Cursor blinking

(d)                  none of the above

Sollution

(b)                  Right shift

Question no-9
Which particular port is not having internal pull up in 8051


Optional Answers

(a)                  Port 0

(b)                  Port 1

(c)                  Port 2

(d)                  Port 3

Sollution

(a)                  Port 0

Question no-10
X address in graphical LCD(128x64) represents


Optional Answers

(a)                  shifting

(b)                  scrolling

(c)                  page

(d)                  none of the above

Sollution

(c)                  page

Jai guru dev

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