Data Types and Structures 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 Data Types and Structures flashcards as text
What does the MATLAB function `iscell()` return when passed a cell array?
Answer: 1
`iscell()` returns logical 1 (true) if the input is a cell array, and 0 otherwise.
Which MATLAB syntax correctly accesses the second element of a cell array `C`?
Answer: C{2}
Curly braces `C{2}` extract the contents of a cell, while parentheses `C(2)` return a cell array subset.
What is the default numeric data type for variables created by typing a number in MATLAB?
Answer: double
MATLAB defaults to `double` (64-bit floating point) for all numeric literals unless explicitly cast.
How do you create a 1x3 struct array named `s` with field `name` in MATLAB?
Answer: s = struct('name', {'Alice','Bob','Carol'})
Passing a cell array of values to `struct()` automatically creates a struct array with one element per cell.
What does `typecast(int32(1), 'uint32')` return in MATLAB?
Answer: The bit pattern of int32(1) reinterpreted as uint32
`typecast` reinterprets the underlying bit pattern without converting the value, so int32(1) becomes uint32(1) since the bits are identical.
Which function converts a numeric array to a logical array in MATLAB?
Answer: logical()
`logical()` converts a numeric array to logical type, where 0 becomes false and any nonzero becomes true.
What is the result of `class(uint8(200) + uint8(100))` in MATLAB?
Answer: uint8
Arithmetic on uint8 operands produces a uint8 result, with the value saturating at 255 instead of overflowing.