What are typed arrays?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of JavaScript conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
Typed arrays are array-like objects from ECMAScript 6 API for handling binary data. JavaScript provides 12 Typed array types,
- Int8Array: An array of 8-bit signed integers
- Uint8Array: An array of 8-bit unsigned integers
- Uint8ClampedArray: An array of 8-bit unsigned integers clamped to 0-255
- Int16Array: An array of 16-bit signed integers
- Uint16Array: An array of 16-bit unsigned integers
- Int32Array: An array of 32-bit signed integers
- Uint32Array: An array of 32-bit unsigned integers
- BigInt64Array: An array of 64-bit signed BigInts
- BigUint64Array: An array of 64-bit unsigned BigInts
- Float16Array: An array of 16-bit floating point numbers
- Float32Array: An array of 32-bit floating point numbers
- Float64Array: An array of 64-bit floating point numbers
For example, you can create an array of 8-bit signed integers as below
const a = new Int8Array();
// You can pre-allocate n bytes
const bytes = 1024;
const a = new Int8Array(bytes);
Candidate Response Strategy & Interview Tips
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