AutoCAD Viva Questions and Answers

AutoCAD Viva Questions and Answers

1. In which format, the each decimal digit is expressed in a Binary Coded Decimal (BCD) number?

In a BCD system, each decimal digit is represented by Bits.

2. What is the earliest calculating device?

Abacus

3. Discuss about first, second, third and fourth generation computers?

Vacuum tubes are used in the first generation computers. From year 1940 to 1955, first generation computers are commonly used. The second generation computers are used from 1955 to 1965 and the technology used is transistor technology. In third generation, Integrated chips (IC) are used and is from 1965 to 1971. The fourth generation computers uses Very Large Scale Technology (VLSI) an is common from 1971 onwards.

4. What is machine language?

The binary system uses only two symbols (o and 1). The language written in the form of binary number system (in the form of 0's and 1's)  is known as binary system.

5. Discuss about compiler (interpreter), assembly language and algorithm?

A compiler or interpreter is a program that is used to translate a high level language program into the machine language (0 and 1). The assembly language is a low level language used by alphabets used  as machine language. The purpose of an assembler is to translate this language to machine language. We can define Algorithm as a series of step by step instructions to perform a particular task.

6. Compare Input unit, output unit and Buses?

In order to feed data to the CPU or memory, input units are used. Mouse, keyboard, scanner etc are the examples of input unit. in an output unit, the data is transferred from computer to outside. Examples for output units are speakers, monitor, printer etc. A bus can be defined as a set of wires which connects all the devices. Buses are mainly of two types: system bus and expansion bus. A system bus is used to connect processor and other devices on mother board, while an expansion bus is used to connect processors and other devices on mother board.

Note: Commonly used operating system is windows, developed by Microsoft. Pentium is a series of microprocessors developed in 1993 for running 32 bit applications by Intel.

7. Discuss about registry and cache?

We can define registry as a central data base, which contains settings and informations regarding computer. It is usually stored in MS - DOS. Cache is a special area of primary memory (RAM). Cache memory is used for storage of temporary programs.

8. What you know about LAN, MAR, Program counter and Buffer?

The LAN(Local Area Network) is the interconnection of computers in a building, company or in a room. All the interconnected computers can share datas.

The Memory Address register (MAR) contains the address of a memory location, where data is to read or written by the CPU.

The program counter is a register in the CPU, which contains the memory address of the next instruction to be executed.

9. Discuss the following terms: Buffer, accumulator, stack, plotter and GUI?

The buffer is an area of memory, which is set aside for temporary storage of data until an external event is completed.

The accumulator register temporarily stores the result of any operation done in ALU. 

Stack is an area used in the RAM memory to Last In First Out (LIFO) data storage.

In order to draw graphic objects, plotter is used.

The Graphical User Interface (GUI) can be defined as the use of pictures and other graphical objects to interact with computer.

10. Discuss about the various commands used in AUTOCAD?

ORTHO - The command ORTHO is used for the movement of the cursor. The movement may be horizontal or vertical direction.

SNAP - The command SNAP is used to specify precise locations on objects.

OOPS- The OOPS command is used to restore all objects which are deleted by the use of ERASE.

ALLIGN - The command ALLIGN is used to move, rotate or tilt an object. Hence it alligns with other object.

ARC - We can create arcs in several ways. Arcs are drawn counter clockwise from start point to end point.

AREA -   In order to obtain the area and perimeter defined by selected objects or a sequence of points, the command AREA is used.

ARRAY - Creating copies of objects in rectangular or circular (polar) pattern is called as an array.

ATTDEF - In order to create an attribute, we first create the definition of the attribute. The definition of the attribute describes the characteristics of the attribute. The command ATTDEF describes the definition of the attribute.  The characteristics includes the tag, value information, location, text formatting, the prompt displayed when the block is inserted and some optional modes like invisible, constant, verify and present.

AUDIT - when a drawing file is damaged, we can recover some part or all of the data.

BEDIT - We must add flexibility and intelligence to the block geometry, in order to add the dynamic behaviour to a block definition. A dynamic block reference of a drawing can be manipulated, instead of a fixed part.

BHATCH - we can hatch an area using a predefined hatch pattern. The solid pattern is used to fill an area with a solid colour.

BOUNDARY - We can combine the existing regions into a single or complex region for calculating the area.

BREAK -  In order to break an object into two objects with or without a gap between them. We can also join the objects to make a single object.

CHAMFER - In order to connect two objects with an angled line. It represents the bevelled edge on corner.

CIRCLE -  We can create circle in several methods. The default method of creation of circle is to specify the centre and radius of the circle.

COPY - The COPY command is used to copy objects at specified distance in a specified direction.

3D ARRAY - This is used to create a three - dimensional array.

ARRAY- It is used to create multiple copies of objects in a pattern.

UCS -   It is used to manage user coordinate systems.

UNITS -  It is used to control coordinate and angle display formats and precision.

SAVEAS -  This saves a copy of the current drawing under a new file name.

CYLINDER - It is used to create a three sided 3D solid with a circular or elliptical base and top.

DIMEDIT - This command edits dimension text and extension lines on dimension objects.

DIMTEDIT - This command is used to move and rotates dimension text.

PROPERTIES - This is used to control then properties of existing objects.

CUTCLIP - The CUTCLIP command is used to copy objects to the clipboard and to remove the objects from drawing.

ERASE - This is used to remove objects from a drawing.

PURGE - This command is used to remove unused named items such as block definitions and layers, from the drawing.

REDRAW - This command is used to refresh the display in the current viewport.

REGEN - In order to regenerates the entire drawing from the current view point, the REGEN command is used.

UNDO - This command reverses the effect of commands.

EXTEND - This command is used to extend an object to meet another object.

JOIN - This joins objects to form a single and unbroken object.

LENGTHEN - This command changes the length of objects and the included angle of arcs.

TRIM - In order to trims objects at a cutting edge defined by other objects, the TRIM command is used.