Register Set of 8051
1.

Which of the following is an 8-bit register?

A.  

PSW(Program Status Word)

B.  

TCON(Timer Control Register)

C.  

Accumulator

D.  

All of the mentioned

2.

Which of the following register can be addressed as a byte?

A.  

P1

B.  

SCON

C.  

TMOD

D.  

TMOD

3.

Which of the following is bit-addressable register?

A.  

SBUF

B.  

PCON

C.  

TMOD

D.  

SCON

4.

The higher and lower bytes of a 16-bit register DPTR are represented respectively as

A.  

LDPTR and HDPTR

B.  

DPTRL and DPTRH

C.  

DPH and DPL

D.  

HDP and LDP

5.

The register that is used for accessing external data memory is

A.  

DPHDPL

B.  

DPL

C.  

DPTR

D.  

NONE

6.

Among the four groups of register banks, the number of groups that can be accessed at a time is

A.  

1

B.  

2

C.  

3

D.  

all the four

7.

The number of 8-bit registers that a register bank contain is

A.  

2

B.  

4

C.  

6

D.  

8

8.

If RS1=1, RS0=0, then the register bank selected is

A.  

register bank 0

B.  

register bank 1

C.  

register bank 2

D.  

register bank 3

9.

If RS1=1, RS0=1, then the register bank selected is

A.  

register bank 0

B.  

register bank 1

C.  

register bank 2

D.  

register bank 3

10.

The PCON register consists of

A.  

power mode bit

B.  

power idle bit

C.  

power ideal bit

D.  

power down bit and idle bit