Q.1
Choose the devices that are using a microcontroller
  • Microwave
  • Fridge
  • Sand Clock
  • Both A & B
Q.2
Size of on chip ROM
  • 128 bytes
  • 256 bytes
  • 4K bytes
  • 64K bytes
Q.3
How many SFRs are available ?
  • 10
  • 11
  • 12
  • 21
Q.4
Initial Address of stack memory
  • 05H
  • 06H
  • 07H
  • 08H
Q.5
Bit addressable location available in RAM
  • 8 bytes
  • 16 bytes
  • 32 bytes
  • 128 bytes
Q.6
How many interrupt sources available in 8051?
  • 4
  • 5
  • 10
  • 15
Q.7
Which of the following are 8 bit registers?
  • PSW
  • ACCUMULATOR (A reg)
  • DPTR
  • Both A & B
Q.8
The registers of Timer 1 are accessed as
  • TL0 & TL1
  • TH0 & TH1
  • TL0 & TH0
  • TL1 & TH1
Q.9
The timers of theare
  • 4 bit
  • 8 bit
  • 16 bit
  • 32 bit
Q.10
How many register bank in 8051?
  • 1
  • 2
  • 3
  • 4
Q.11
Full form of DJNZ ?
  • Decrease Just Number Zero
  • Decrement Jump Not equal to Zero
  • Data Jump New address if Zero
  • Delete and Jump to Number Zero
Q.12
Which of the following are assembler directives?
  • ORG
  • CALL
  • Both A & B
Q.13
Pin number of Vcc?
  • 20
  • 40
  • 1`
  • 10
Q.14
DPTR stands for
  • Discrete Pointer
  • Display Pointer
  • Data Pointer
  • Default Pointer
Q.15
Select the characteristics of Assembler directives
  • Pseudo instruction
  • gives directions to assembler
  • executable instruction
  • Both A & B
Q.16
In structure of ASM which field is Mnemonic
  • label
  • operand
  • comment
  • opcode
Q.17
Which language is used for programming 8051?
  • Assembly Language
  • Machine Language
  • C Language
  • English Language
Q.18
Which file type is finally burnt in the ROM
  • .abs
  • .asm
  • .hex
  • .lst
Q.19
How many types of addressing mode are there in 8051?
  • 5
  • 4
  • 3
  • 2
Q.20
CJNE stands for
  • Comment & Jump if Number Enable
  • Compare & Jump if Not Equal
  • Carry bit Just if Number Equal
0 h : 0 m : 1 s