Assembler Interview Questions
Questions Answers Views Company eMail

What is the use of TRT instruction and how it is working?

Wipro, HCL, IBM,

7 25186

How are data passed from JCL parm to assembler program. And how is data passed from a calling program to an assembler called program.

HCL, IBM,

3 9973

Why can only 256 bytes be moved from one address to another in a MVC?

HCL, CSC, IBM,

6 9156




What is base register?

Infosys, IBM,

23 72479

What is house keeping in assembler? And explain the following code HELLOTSO START 0 * PRINT NOGEN BEGIN SAVE (14,12) LR 12,15 USING TYPE,12 ST 13,SAVE+4 LA 11,SAVE ST 11,8(13) LR 13,11

Mind Tree,

6 13323

How do you initialize a register to 0000?

HCL,

10 13746

Why do we use "drop"? What does "using" do?

4 7307

What is the difference in data type "X" and "P"?

5 7044




Why do we have multiple base registers in certain programs?

IBM,

4 8933

WHAT WILL HAPPEN IF WE DROP THE BASE REGISTER IN THE PGM WHICH CONTAINS ONLY ONE BASEREG?

Tech Mahindra, IBM,

4 6787

How we can Pass the parameters from JCL to assembler Pgm?

Tech Mahindra,

4 10564

How we can retrieve the instream data in SYSIN ?

Tech Mahindra,

2 5879

Can we use an equated value as operand for an MVC instruction? Reason for the same

IBM,

8 7007

about ICM instruction.

EDS,

4 11444

about maximum displacement and how to cross this limit.

EDS,

2 5667


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Un-Answered Questions { Assembler }

How are data passed from jcl parm to assembler program?

57


What does the following code do? Ap wkur,=p5 where wkur is a label?

47


Why do we use "drop"?

41


What is need of start 0? In steed of can we use anyother numerics? If we use what will happen?

51


Explain the difference in data type "x" and "p"?

38






What is house keeping in assembler?

43


Explain the difference between various read and find statement?

40


What is maximum displacement?

34


In the house keeping section of an MVS assembly language program, like the one below STM R14,R12,12(R13) BASR R12,R0 USING *,R12,R11 LA R11,2048 LA R11,2048(R11,R12) .... .... 1. What if BASR R12,R0 IS NOT PRECEDE USING *,R12,R11? 2. USING (base address), REGISTER does USING directive says assembler to treat particular Register as a base register with the mentioned base address..in the above case * i.e current location counter..well if that is the case why we need BASR R12,R0 ? 3. What if I write like STM R14,R12,12(R13) BASR R12,R0 LA R11,2048 LA R11,2048(R11,R12) USING *,R12,R11 there is no address resolution being calculated in both LA statements so is it a right way to set Base register?..will there be any issues with Domain regarding R11 and R12?

907


Explain how to initialize a register to 0000?

47


What is the use of trt instruction?

46


How is data passed from a calling program to an assembler called program?

46


What does "using" do?

37


Explain about maximum displacement?

43


Explain how to access vsam file?

54