Assembler Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Assembler Interview Questions

Questions Answers Views Company eMail

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

HCL, IBM, Wipro,

7 34309

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 14557

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

CSC, HCL, IBM,

6 15768

What is base register?

IBM, Infosys,

23 94426

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 21584

How do you initialize a register to 0000?

HCL,

10 21590

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

4 11122

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

5 11209

Why do we have multiple base registers in certain programs?

IBM,

4 13768

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

IBM, Tech Mahindra,

4 10685

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

Tech Mahindra,

4 15949

How we can retrieve the instream data in SYSIN ?

Tech Mahindra,

2 8776

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

IBM,

8 13412

about ICM instruction.

EDS,

4 18707

about maximum displacement and how to cross this limit.

EDS,

2 8549

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Un-Answered Questions { Assembler }

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?

1977

Explain how to initialize a register to 0000?

1008

Explain how to access vsam file?

1082

Explain about maximum displacement?

1050

How are data passed from jcl parm to assembler program?

1000

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

1086

Explain the difference between various read and find statement?

1047

What is icm instruction?

1059

How do you round the addition or subtraction of two numbers in assembler?

1019

Why do we use "drop"?

979

Explain about house keeping in assembler?

1041

How many maximum base registers we can have in a program?

1028

What is the use of trt instruction?

1010

Explain about base register?

1055

What is need of start 0?

1117

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