2023 2024 EduVark > Education Discussion > General Discussion


  #1  
June 26th, 2013, 11:14 AM
Super Moderator
 
Join Date: Mar 2013
SMU Assignment For MCA

I want Assignment Questions of SMU for MCA so will you please provide me?

Hello friend as you want the SMU MCA Solved Assignments so here I am providing you the same….

1. Write short notes on any five Input devices.
Ans: 1. Mouse:
This Input device is categorized as a pointing device because it is used to point and select an option on the monitor. It is small boxlike object that is connected to the computer by a cable and can be rolled around on the table. A pointer on the screen follows the movements of the mouse; rolling the mouse left moves the pointer left by an equipment amount, rolling the mouse in the right direction moves the pointer in the right direction, rolling the mouse in the up direction moves the pointer in the up direction, rolling the mouse in the down direction moves the pointer in the down direction and we can roll the mouse in a angular direction also.

2. Keyboards
Keyboards are the most widely used input devices. The most popular keyboards are those that look, feel, and possibly sound like an ordinary typewriter keyboard. Alternatives are Membrane keyboards, whose keys are merely printed on a plastic membrane. A pressure sensitive twodimensional keyboard covered with a dust proofed and dirt proofed plastic sheet are useful in dirty environments. Keyboards are of different varieties. Generally a keyboard has 105 keys. It features 12 function keys.

3. Scanners:
These are the eyes of your computer. They can see images or printed text and translate them into binary code. Most scanners collect data from a page by recording, which areas are light and which areas are dark. They contain a camera, which is made up of thousands of tiny cells, called charge coupled devices (CCD). Each CCD detects whether a small part of the image is either light or dark. It transmits this data to the CPU, which then creates the image.

4. Optical Character Readers (OCR):
These are another kind of input devices that are used to read any printed text. They can interpret handmade marks, handwritten characters, machine printed characters and special symbols and codes. Optical character readers scan text character-by-character converts them into machine readable codes and store it in the memory.

5. Joy Stick
A lever that moves in all directions and controls the movement of a pointer or some other display symbol a joystick is similar to a mouse, except that with a mouse the cursor stops moving as soon as you stop moving the mouse. With a joystick, the pointer continues moving in the direction the joystick is pointing.

2. Differentiate combinational circuit and Sequential circuits.
Ans: Combinational Circuits
A combinatorial circuit is a system containing basic Boolean operations (AND, OR, NOT), some inputs, and a set of outputs. Since each output corresponds to an individual logic function, a combinatorial circuit often implements several different boolean functions. It is very important that we remember this fact – each output represents a different Boolean function.
A computer’s CPU is built up from various combinatorial circuits. For example, you can implement an addition circuit using Boolean functions. Suppose you have two one-bit numbers, A and B. You can produce the one bit sum and the one-bit carry of this addition using the two
Boolean functions:
S = AB’ + A’B Sum of A and B.
C = AB Carry from addition of A and B.
These two Boolean functions implement a half-adder. Electrical engineers call it a half adder because it adds two bits together but cannot add in a carry from a previous operation.
A full adder adds three one-bit inputs (two bits plus a carry from a previous addition) and
produces two outputs: the sum and the carry. The two logic equations for a full adder are

S = A’B’Cin + A’BCin’ + AB’Cin’ + ABCin
Cout = AB + ACin + BCin
Although these logic equations only produce a single bit result (ignoring the carry), it is easy to construct an n-bit sum by combining adder circuits. So, as this example clearly illustrates, we can use logic functions to implement arithmetic and Boolean operations.

Sequential Circuits
A digital logic circuit or system is usually made up of combinational elements such as NAND and NOR gates and memory elements which may, for example, be discrete flip-flops or latches.
Alternatively, an interconnection of these devices may be found in a shift register, a counter, or in a variety of MSI and LSI packages.
In effect, logic operations can be performed sequentially, information being stored in a memory element and released at some specified instant later so that it can take part in a controlled combinational operation.
Systems operating in this way are called sequentially operated systems. There has always been considerable confusion over the use of the terms latch and flipflop. It will be assumed in this book that a flip-flop is a device which changes its state at times when a change is taking place in the clock signal.

3. What is computer memory? Explain its types.
Ans: In computer, memory denotes to the state information of a computing system, as it is kept active in some physical structure. Computer, memory means to the state information of a computing system, as it is kept active in some physical structure. The term "memory" is used for the information in physical systems which are fast (i.e. RAM), as a distinction from physical systems which are slow to access (i.e. data storage). By design, the term "memory" denotes to temporary state devices, whereas the term "storage" is reserved for permanent data. Advances in storage technology have blurred the distinction a bit memory kept on what is conventionally a storage system is called "virtual memory".

There are two types of computer memory: primary and secondary.
Primary memory is accessible directly by the processing unit. RAM is a model of primary memory. As soon as the computer is switched off the contents of the primary memory is lost. We can store and retrieve data much quicker with primary memory compared to secondary memory.

Primary memory is computer memory that a processor or computer accesses first or directly. It allows a processor to access running execution applications and services that are temporarily stored in a specific memory location.
Secondary memory such as floppy disks, magnetic disk, etc., is located outside the computer. Primary memory is more expensive than secondary memory. Because of this the size of primary memory is less than that of secondary memory. Computer memory is used to store two things: i) instructions to execute a program and ii) data. When the computer is doing any job, the data that have to be processed are stored in the primary memory. This data may come from an input device like keyboard or from a secondary storage device like a floppy disk.
Secondary memory is computer memory that is non-volatile and persistent in nature and is not directly accessed by a computer/processor. It allows a user to store data that may be instantly and easily retrieved, transported and used by applications and services. Secondary memory is also known as secondary storage.

4. Explain the features of a mouse and a track ball

Last edited by Neelurk; March 12th, 2020 at 11:08 AM.
Similar Threads
Thread
MDU Assignment MBA
IGNOU TS 6 Assignment
Assignment of SMU
BAOU MEG 2 Assignment
KSOU assignment
UPRTOU Assignment
IGNOU AOM 1 Assignment
WBNSOU Assignment
FHD 02 Assignment IGNOU
IGNOU EHI-01 Assignment
FST 1 IGNOU assignment
DDELNMU Assignment
NDA Assignment
Free Sample Assignment MBA MBA Assignment Sample
SMU MCA Assignment



Quick Reply
Your Username: Click here to log in

Message:
Options



All times are GMT +5. The time now is 02:51 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.6.0

1 2 3 4 5 6 7 8