Q. In general, the destination operand of an instruction can be

View solution

Q. Which of the following is a mnemonic?

View solution

Q. The instruction in which adjustment is made before performing the operation is

View solution

Q. The expansion of DAA is

View solution

Q. The instruction that is used to convert the result of the addition of two packed BCD numbers to a valid BCD number is

View solution

Q. The ROR instruction rotates the contents of the destination operand to

View solution

Q. The mnemonic that is placed before the arithmetic operation is performed is

View solution

Q. The Carry flag is undefined after performing the operation

View solution

Q. The instruction that performs logical AND operation and the result of the operation is not available is

View solution

Q. In the RCL instruction, the contents of the destination operand undergo function as

View solution

Q. The instruction that is used as prefix to an instruction to execute it repeatedly until the CX register becomes zero is

View solution

Q. Match the following:

A) MOvSB/SW 1) loads AL/AX register by content of a string

B) CMPS 2) moves a string of bytes stored in source to destination

C) SCAS 3) compares two strings of bytes or words whose length is stored in CX register

D) LODS 4) scans a string of bytes or words

View solution

Q. The instructions that are used to call a subroutine from the main program and return to the main program after execution of called function are

View solution

Q. The instruction that unconditionally transfers the control of execution to the specified address is

View solution

Q. Which instruction cannot force the 8086 processor out of ‘halt’ state?

View solution

Q. NOP instruction introduces

View solution

Q. Which of the following is not a machine controlled instruction?

View solution

Q. The assembler directives which are the hints using some predefined alphabetical strings are given to

View solution

Q. The directive used to inform the assembler, the names of the logical segments to be assumed for different segments used in the program is

View solution

Q. Match the following:

a) DB 1) used to direct the assembler to reserve only 10-bytes
b) DT 2) used to direct the assembler to reserve only 4 words
c) DW 3) used to direct the assembler to reserve byte or bytes
d) DQ 4) used to direct the assembler to reserve words

View solution