Practice Test GeeksMATLAB - MATLAB Technical Computing Practice Test
← All MATLAB Flashcard Decks

Environment and Syntax Flashcards

7 cards from real MATLAB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Environment and Syntax flashcards as text

  1. What does the `whos` command display that `who` does not?

    Answer: Variable names, sizes, bytes, and class

    `whos` provides detailed information including size, bytes allocated, and data class for each variable, while `who` lists names only.

  2. In MATLAB, what is the result of entering `3 == 3` at the command line?

    Answer: 1

    MATLAB's equality operator returns a logical 1 (true) or 0 (false), and the result is displayed as the integer 1.

  3. Which keyboard shortcut recalls the previous command in the MATLAB Command Window?

    Answer: Up arrow key

    Pressing the Up arrow key cycles through command history in the MATLAB Command Window.

  4. What happens when you type `clear all` in MATLAB?

    Answer: Removes all variables from the workspace

    `clear all` removes all variables, globals, functions, and MEX links from the workspace memory.

  5. How do you suppress output for a statement in MATLAB?

    Answer: End the line with a semicolon (;)

    A semicolon at the end of a statement prevents MATLAB from displaying the result in the Command Window.

  6. What is the purpose of the `ans` variable in MATLAB?

    Answer: It holds the result of the most recent expression that wasn't assigned to a variable

    `ans` is automatically assigned the result of any expression evaluated without an explicit variable assignment.

  7. Which of the following is a valid MATLAB variable name?

    Answer: firstValue1

    MATLAB variable names must start with a letter and contain only letters, digits, and underscores; `firstValue1` satisfies all rules.