MP INSTRUCTIONS

Front

What is the primary function of a microcontroller?

Back

Execute user programs

Answer explanation

Microcontrollers execute user-defined embedded programs.

Front

Which section of assembly code holds instructions? Options: .text, .data, .bss, .const

Back

.text

Answer explanation

.text section is used for holding executable instructions.

Front

What directive is used to allocate initialized data? Options: .text, .bss, .data, .global

Back

.data

Answer explanation

.data is used for initialized data.

Front

What does the LDI instruction do?

Back

Loads immediate value

Answer explanation

LDI loads an immediate value into a register.

Front

Which instruction performs an unconditional jump? Options: BRNE, RJMP, CALL, NOP

Back

RJMP

Answer explanation

RJMP jumps to a relative address unconditionally.

Front

What is the purpose of the EQU directive?

Back

Equates a label with a value

Answer explanation

EQU assigns a constant value to a symbol.

Front

What does the BRNE instruction check?

Back

Zero flag clear

Answer explanation

BRNE jumps if the zero flag is NOT set.

Front

What does a subroutine provide in a program? Options: Loops, Delays, Modularity, Variable storage

Back

Modularity

Answer explanation

Subroutines improve code modularity and reuse.

Front

Which directive reserves uninitialized space? Options: .text, .bss, .const, .res

Back

.bss

Answer explanation

.bss reserves space for uninitialized data.

Front

What instruction ends a subroutine? Options: JMP, RJMP, RET, CALL

Back

RET

Answer explanation

RET returns control to the caller of a subroutine.