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The CORRECT CHOICE is (b) False

The best explanation: The meshc() command does not TAKE complex inputs. MATLAB will RETURN an error if any such input is given.

Right option is (a) ezplot()

Explanation: The ezplot command takes in FUNCTIONS REPRESENTED SYMBOLICALLY. The INPUT is given as a string. So INLINE functions can be given as an input to the ezplot command to get a general graph of the input function.

The correct answer is (a) hold on

The best explanation: The command used to hold the control to an already generated GRAPH so that further plots can be made on the same window is hold on. The contour command is used to GENERATE graph of the same function on DIFFERENT levels while the hold on command is used to generate GRAPHS of multiple functions in the same window.

Right CHOICE is (a) fontname{}

For explanation: The desired fontname could be given in the style denoted by fontname{}, to the text COMMAND. This will change the font of the text PRINTED in the graph.

Correct CHOICE is (a) bar3h()

The best EXPLANATION: The Bar3() COMMAND plots vertical 3-D BAR graphs. The bar3h() command plots horizontal bar graphs hence bar3h() is correct.

The CORRECT choice is (a) Use the TEXT COMMAND

For explanation I would say: The plot command will be to plot the GRAPHS only. The title command is used to introduce a title outside the GRAPH. A text can be introduced in a graph by using the text command.

The correct choice is (a) [1 1 0]

Easy EXPLANATION: The RGB TRIPLET specifies the intensity of Red, YELLOW and Green for a user-specified color input to the surf COMMAND. For yellow, it is defined in MATLAB as [1 1 0].

Right option is (a) ezplot()

For explanation: The PLOT, stem and the plot3() COMMAND does not have a default fundamental period, we NEED to DEFINE the period of x-axis. The ezplot command generates a plot of the input FUNCTION over a default fundamental period. This fundamental period is [-2*pi,2*pi].

The correct choice is (b) 24

The explanation is: The text command WOULD be created 24 objects in the MEMORY for 24 texts ADDED in the graph. It will be able to ACCESS those texts and EDIT them.

Correct answer is (a) [-5,5]

To explain: The FPLOT command is almost like the ezplot command. It will PLOT the graph of y=f(x) within an INTERVAL [-5,5] as it was defined. This default range can be changed by GIVING a SEPARATE vector input to the fplot() command.

Correct ANSWER is (B) title()

Best explanation: The title() command is used to PROVIDE a title to the graph PLOTTED in MATLAB. It can be provided from the taskbar of the window which opens due to the plot command.

The correct option is (B) Mentioning stacked as input to the bar3h() COMMAND

To explain I WOULD SAY: The bar3h() command is used to make a horizontal pie chart of a SET of data. The bars can be stacked by giving ‘stacked’ as input to the command.

Correct choice is (c) Matrix

To explain I would say: The final INPUT to the SURF command, z, should be a matrix. The matrix is computed for each co-ordinate generated and given input INTERMS of x and y.

Correct choice is (a) ezplot()

Easy explanation: A GENERAL graph of the function can be viewed by USING the ezplot. If we WANT to define the values of a/b, we will use the plot() or STEM() command. Hence, the answer is ezplot().

The correct ANSWER is (a) 2*pi

For explanation: The SAWTOOTH() command GENERATES a sawtooth waveform which changes it’s PEAK from -1 to 1 in the PERIOD 2*pi. This is inbuilt in MATLAB and so the correct answer is 2*pi.

Correct answer is (a) reduce the GAP between linearly spaced ELEMENTS of the dependent variable t

To explain: If we reduce the gap between the linearly spaced VARIABLES of t, the curvature of sin(t) would be clearly plotted by the PLOT command. Hence, the resultant curve would be a circle.

Correct option is (a) Symbolic MATH TOOLBOX

Explanation: The ezsurf COMMAND can be ACCESSED from the Symbolic Toolbox. The rest of the Toolboxes does not have that command.

The CORRECT option is (a) height

The EXPLANATION: The height of the bar-chart gives a measure of the data being shown. The colorbar command gives DIFFERENT COLOR to the bar chart FOLLOWING their height.

The CORRECT OPTION is (a) [m,N]

For explanation I would say: The SIZE of the z vector is dependent on the size of the x and vectors. The PERMISSIBLE size lies between [m,n] and hence [m,n] is correct.

Right ANSWER is (a) xlabel()

To EXPLAIN: The xlabel() command is used to include a title to SIGNIFY the x-axis of the graph plotted in MATLAB. HENCE, the only correct OPTION is xlabel().

The correct OPTION is (a) True

To explain I would say: The DEFAULT color of the graph GENERATED by the plot/stem command is blue. I TCAN be CHANGED from the plot command itself or the set command.

Right choice is (a) axis square

To explain I would say: There is no such COMMAND called AXES. The command axis is USED to change the axes of the graph that has been plotted in MATLAB. axis equal would’ve made the axes of equal length but axis equals has equals. axis square is the only CORRECT OPTION.

The CORRECT choice is (C) k

Easiest EXPLANATION: The short name for black has been defined in MATLAB as ‘k’. So to make the color black, we need to give k as input to the surf command.

Right ANSWER is (a) Contour plots

The EXPLANATION: Contour plots allow the plot of multiple CURVES of the same function on different CONSTANT levels of the function. This is extremely helpful in analyzing systems.

Right answer is (B) [0 1]

To explain I would say: The RANGE of RGB triplets for the surf command is pre-defined in MATLAB as [0 1].If any other value is GIVEN as INPUT, MATLAB will give an error.

Right OPTION is (B) ylabel()

Best explanation: The command ylabel is used to name the y AXIS of the graph plotted in MATLAB. Hence, option ylabel() is CORRECT.

Correct choice is (b) False

The best I can explain: The scales of the axes can be converted to a linear and logarithmic scales with the SET COMMAND. Hence, the above STATEMENT is false.

The CORRECT option is (c) 2

Easiest explanation: The fill command ca only take 2 inputs. MATLAB will return an error if more than 2 inputs are GIVEN to the fill command.

The correct choice is (b) False

To EXPLAIN: The axis COMMAND can be used to define the limits of the axis present on the graph that is being plotted. The x-axis of the graph would contain VALUES according to the input to the plot/stem command but the visible part of the graph in the NEW window will depend on how the length of the axes are DEFINED by the axis command.

Correct option is (a) True

For EXPLANATION: The SIN() command is defined to generate a sinusoid with a fundamental time PERIOD of 2*pi. The period of sinusoid can be changed by changing the angular frequency while GIVING input to the sine command.

Correct ANSWER is (B) False

Explanation: The following statement is not NECESSARILY true. The color density can be made inversely proportional to the height of the bars by giving the DIRECTION of color density as reverse as an input to the bar3() command.

The CORRECT choice is (a) gca

The explanation: The gca is USED as an object to represent the axes. The properties of the axes are CONTAINED in the gca. The gca can be assigned to a variable and now we don’t have to USE the set COMMAND to edit the axes of the graph. The gcf is used to represent the graph plotted.

Right option is (a) Give ‘GROUPED’ as style input to bar3() command

To explain I would SAY: A 3-d bar graph is created with the bar3() command. The elements of each row of the input VECTOR can be grouped together by giving a STRING input ‘grouped’ to the bar3() command.