Nidify Solutions Interview Questions and Answers

Find elements in a string that occur more than once

• Iterate through the string and count occurrences of each element

• Store elements with occurrences greater than one in a separate list

Compile time errors occur during compilation while run time errors occur during execution of the program in Java.

• Compile time errors are syntax errors detected by the compiler, such as missing semicolons or typos.

• Run time errors occur during program execution, such as null pointer exceptions or array index out of bounds.

• Compile time errors prevent the program from being compiled successfully, while run time errors can cause the program to terminate unexpectedly.

• Examples of co...read more

Find the maximum element in the array of strings.

• Iterate through the array and compare each element to find the maximum.

• Use a built-in function like Math.max() to find the maximum element.

• Consider converting string elements to numbers if applicable before comparison.

To find palindrome for a given number, reverse the number and compare with the original number.

• Convert the number to a string to easily reverse it

• Reverse the string and compare with the original string to check for palindrome

• If the reversed string is equal to the original string, then the number is a palindrome

Junit is a popular testing framework in Java used for unit testing.

• Testing individual units of code

• Automating test cases

• Ensuring code quality and reliability

• Integration testing with other frameworks like Mockito

let is mutable and can be reassigned, const is immutable and cannot be reassigned in JavaScript.

• let is block-scoped, const is also block-scoped.

• let can be reassigned, const cannot be reassigned.

• Use const for values that should not change, use let for values that may change.

useState is a hook in React that allows functional components to have state.

• useState is used to declare a state variable in a functional component.

• It returns an array with the current state value and a function to update that value.

• Example: const [count, setCount] = useState(0);