Computer Questions for Bank Exams

Computer Questions for Bank Clerk Exams

Exercise 3 - Banking Computer Questions

and more bank exam question papers for the students who are preparing for Bank Exams

Future Authentication

Normally the users of computers create passwords for the protection of their resources.

Recently Gmail provided the two level password security to their users.
step 1 : normal password and
step 2 : secret code in Mobile.

This feature is excellent. and challenging to the hackers.

Today I read an article in the following site.

Authenticating users beyond the password

In this article, the author discusses the way in which the authentication can be made. There are three classic "factors" that can be used to confirm a users' identity:

• Using something only the user knows
• Using something unique the user has
• Using something that only the user is

DARPA seeks authentication beyond password 

System Software - Question Bank - Unit 1

 MC9224 - System Software - Question Bank 

Unit - 1

1)      What is system software?

System software consists of variety of programs that supports the operations of a computer. This makes it possible for the user to focus on an application or other problem to be solved ,without needing to know the details of how the machine works internally.

Examples of system software are text-editors,compilers,loaders or linkers,debuggers,assemblers,and operating systems.

2)      How system software is different from Software?

The most important characteristic in which most system software differ from application software is machine dependency.

An application program is primarily concerned with the solution to some problem,using computer as a tool. The focus is on the application,not on the application system.

System programs, on the other hand,are intended to support the operation and use of the computer itself,rather than any particular application. They are usually related to the architecture of the machine on which they are to run.

3)      Explain the machine dependency of  system software with examples?

An assembler is a system software. It translates mnemonic instructions into machine code; the instruction formats,addressing modes ,etc,are of direct concern in assembler design.

Similarly, compilers must generate machine language code,taking into account such hardware characteristics as the number and the types of registers and machine instructions available

Operating systems are directly concerned with the management of nearly all of the resources of a computer system.

Ø  Example:

Ø   When you took the first programming course

·         Text editor - create and modify the program

·         Compiler- translate programs into machine language

·         Loader or linker - load machine language program into memory

Ø  and prepared for execution

·         Debugger - help detect errors in the program

Ø   When you wrote programs in assembler language

·         Assembler - translate assembly program into machine language

·         Macro processor - translate macros instructions into its definition

Ø   When you control all of these processes

·         By interacting with the OS

4)      What are the important machine structures used in the design of system software?

Ø   Memory structure

Ø   Registers

Ø   Data formats

Ø   Instruction formats

Ø   Addressing modes

Ø   Instruction set

5)       What is SIC machine?

SIC refers to Simplified Instruction Computer which  is a hypothetical computer that has been designed to include the hardware features  most often found on real machines,while avoiding unusual and irrelevant complexities. This allows to clearly separate the central concepts of a system software from the implementation details associated with a particular machine.

6)      Explain SIC Machine architecture.

SIC Machine Architecture

Ø  Memory

o   215 bytes in the computer memory

o   3 consecutive bytes form a word

o   8-bit bytes

Ø  Registers

 

Ø  Data Formats

o   Integers are stored as 24-bit binary numbers; 2’s complement representation is used for negative values

o   No floating-point hardware

Ø  Instruction Formats

Ø  Addressing Modes

 

Ø  Instruction Set

o   integer arithmetic operations: ADD, SUB, MUL, DIV, etc.

§  All arithmetic operations involve register A and a word in memory, with the result being left in the register

o   comparison: COMP

§  COMP compares the value in register A with a word in memory, this instruction sets a condition code CC to indicate the result

o   conditional jump instructions: JLT, JEQ, JGT

§  these instructions test the setting of CC and jump accordingly

o   subroutine linkage: JSUB, RSUB

§  JSUB jumps to the subroutine, placing the return address in register L

§  RSUB returns by jumping to the address contained in register L

Ø  Input and Output

o   Input and output are performed by transferring 1 byte at a time to or from the rightmost 8 bits of register A

o   The Test Device (TD) instruction tests whether the addressed device is ready to send or receive a byte of data

o   Read Data (RD)

o   Write Data (WD)

7)      What are the contents of status word register?

Shell Programming - Generating Digital Clock

MC9227 - System Software Lab

Practical Program 6 

Shell Programming - Generation of Digital Clock

 

[rmurali@AntiViruS ~/SS]$ cat > shell.sh

clear

echo;

echo "Practical Program 6 : Shell Programming"

echo "Digital Clock"

echo "Appears in the top Row Right Corner"

echo "Press Ctrl+C to quit the program"

while :

do

ti=`date +"%r"`

echo -e -n "\033[7s"

tput cup 0 59

echo -n $ti

echo -e -n "\033[8u"

sleep 1

done

echo $ti

[rmurali@AntiViruS ~/SS]$ sh shell.sh

                                                           12:38:53 PM

Practical Program 6 : Shell Programming

Digital Clock

Appears in the top Row Right Corner

Press Ctrl+C to quit the program

[rmurali@AntiViruS ~/SS]$

Shell Programming - Sum of Individual Digits

MC9227 - System Software Lab 

Practical Program - 6

Shell Programming - Sum of Individual Digits 

[rmurali@AntiViruS ~/SS]$ cat > shell1.sh

clear

echo "Practical Program 6 : Shell Programming"

echo;

echo "Sum of Individual Digits"

echo;

echo "Enter a number "

read n

sum=0

sd=0

while [ $n -gt 0 ]

do

 sd=`expr $n % 10`

 sum=`expr $sum + $sd`

 n=`expr $n / 10`

done

 echo "Sum of digit For number is $sum"

echo;

echo "End of Shell Program1"

[rmurali@AntiViruS ~/SS]$ sh shell1.sh

Practical Program 6 : Shell Programming

Sum of Individual Digits

Enter a number

434

Sum of digit For number is 11

End of Shell Program1

[rmurali@AntiViruS ~/SS]$