Quiz for PropTypes

Q1: What is the purpose of PropTypes in React?

A. To define default values for props B. To validate the type of props passed to a component C. To style components D. To manage component lifecycle

Q2: Which package must be imported to use PropTypes?

A. react-proptypes B. react-types C. prop-types D. types-prop

Q3: How do you mark a prop as required using PropTypes?

A. PropTypes.name B. PropTypes.string.required C. PropTypes.string.isRequired D. PropTypes.required.string

Q4: Which PropType is used to validate a prop as an array?

A. PropTypes.object B. PropTypes.array C. PropTypes.func D. PropTypes.number

Q5: How do you validate a prop that should be a number?

A. PropTypes.int B. PropTypes.num C. PropTypes.number D. PropTypes.digit

Q6: Which PropType is used to validate a function?

A. PropTypes.func B. PropTypes.function C. PropTypes.method D. PropTypes.callable

Q7: How do you specify that a prop should be one of several specific strings?

A. PropTypes.stringIn() B. PropTypes.oneOf() C. PropTypes.enum() D. PropTypes.anyOf()

Q8: What does PropTypes.shape({}) do?

A. Validates prop as an object with any shape B. Validates prop as a specific array C. Validates an object with a specific structure D. Creates default props

Q9: Which PropType is used to allow any type of value?

A. PropTypes.any B. PropTypes.object C. PropTypes.variable D. PropTypes.dynamic

Q10: How can you validate a React node (text, element, or fragment)?

A. PropTypes.element B. PropTypes.node C. PropTypes.component D. PropTypes.unit

Q11: Which PropType is used to validate a single React element?

A. PropTypes.element B. PropTypes.node C. PropTypes.object D. PropTypes.view

Q12: How do you validate an array of strings?

A. PropTypes.arrayOf(PropTypes.string) B. PropTypes.array.string C. PropTypes.array().string() D. PropTypes.stringArray()

Q13: Which PropType is best for a boolean value?

A. PropTypes.bool B. PropTypes.boolean C. PropTypes.trueFalse D. PropTypes.binary

Q14: PropTypes.objectOf(PropTypes.string) is used to validate?

A. Array of strings B. String of objects C. Object with string values D. Any object

Q15: How do you import PropTypes in a React component?

A. import PropTypes from "react"; B. import PropTypes from "react-dom"; C. import PropTypes from "prop-types"; D. import PropTypes from "props";

Q16: What will happen if a required prop is not passed?

A. A warning is shown in the console B. Component crashes C. Nothing happens D. Prop is replaced with default

Q17: PropTypes.oneOfType([PropTypes.string, PropTypes.number]) is used to?

A. Validate prop is string only B. Validate prop is number only C. Validate prop is either string or number D. Validate prop is any type

Q18: PropTypes.exact({}) is used to?

A. Validate prop must exactly match the shape B. Validate any object C. Allow dynamic keys D. Validate types loosely

Q19: Which lifecycle phase checks PropTypes?

A. Before render B. After render C. During compile D. PropTypes are not part of lifecycle

Q20: What is the benefit of using PropTypes?

A. Improves performance B. Improves code readability and catches bugs C. Reduces component size D. Improves CSS styling