matlab linkedin quiz answers
1. Which is not a feature of the inputParser object?
- It creates name-value pair arguments.
- It customizes error messages.
- It gives optional parameters default values.
- It validates arguments.
3. What kind of files are stored with the .mat extension?
- function files
- stored variable files
- figure files
- script files
4. You are debugging a function and have set a breakpoint on the line before the error occurs. You look at the variable values and suspect the cause of the error is that a is 9 but should be 10. The next statement after the breakpoint will use a. Which action would help you test if a=10 solves the problem?
- Type “a = 10; continue” into the command window.
- Type “a = 10;” into the function file, before the statement that’s throwing an error. Then type “return;” into the command window.
- Type “a = 10” into the command window. Then click the Run button in the debugger window.
- Type “a = 10:” into the function file, before the statement that’s throwing an error. Then click the Run button in the debugger window.
5. At what will MATLAB look first for a called function?
- functions within the current file
- built-in functions
- functions within the current directory
- functions on the path
6. How is the random seed for MATLAB's random number generator first initialized in a MATLAB session?
- Seed is undefined until it is initialized by the user.
- Seed is set to a value based on the current time on startup.
- Seed is set to a value based on the current time when user first calls rand().
- Seed is set to a static default value on startup.
7. What is a reason to save a MAT-file using the -v7. 3 flag?
- to avoid HDF5 overhead in MAT-file
- to include a variable greater than 2GB
- to ensure backward compatibility
- to use compression by default
8. What is a key difference between && and &?
- && is a logical operator and & is not.
- && employs short-circuiting behavior and & does not.
- & & is a bitwise operator and & is not.
- && is always slower than &.
9. What is the result of this code?
s="abcd"; s(3)='x'
- a 1x 3 string array
- abxd
- a run-time error
- “abxd”
10. You would like to randomly reorder every element in array a and put the results in b. Which code block will not necessarily do that?
a = 1:10;
11. For a 5 x5 array, the two subscript index (4,2) indexes the same location as linear index _____ .
- 8
- 7
- 17
- 9
12. Which statement returns a cell array of the strings containing 'burger from menu?
menu = {'hot dog' 'corn dog' 'regular burger' 'cheeseburger' 'veggie burger'};
- menu{strfind (menu, ‘burger’ )}
- menu (strfind(menu, ‘burger’) )
- menu (contains (menu, ‘burger’))
- menu{contains (menu, ‘burger’ ) }
13. What is the set of possible values that a may contain?
a = randi(10, [1,10]);
a(3) = 11;
a(a>2)=12;
- 2, 11, 12
- 1, 2, 12
- 1, 12
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
14. my func is a function as follows. What is the value of a at the end of the code beneath?
function a = my_func(a)
a = a + 1;
end
------------
a = 0;
for i = 1:3
my_func(a);
end
a = my_func(a);
- 3
- 1
- 4
- 0
15. Which statement returns the character array 'alone'?
b
= ['stand'
'alone'];
- b(2)
- b(7:11)
- b(1,2)
- b(6:end)
