Gambia College Interview Questions and Answers

let, const, and var are used to declare variables in JavaScript. Closures are functions that have access to their outer scope even after the outer function has finished executing.

• let: block-scoped variable declaration, can be reassigned

• const: block-scoped variable declaration, cannot be reassigned, but its properties can be modified

• var: function-scoped variable declaration, can be reassigned

• Closure: inner function has access to outer function's variables even after outer func...read more

OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction. Abstraction is a concept where only relevant information is shown to the user, while interface is a blueprint for classes.

• OOPs concepts: encapsulation, inheritance, polymorphism, abstraction

• Abstraction: showing only relevant information to the user

• Interface: blueprint for classes, defines methods without implementation

• Example: Abstraction - Car dashboard displaying speed without showing internal ...read more

String reverse and factorial programs in array of strings.

• For string reverse program, iterate through the string from end to beginning and append each character to a new string.

• For factorial program, use a loop to multiply numbers from 1 to n.

• Example for string reverse: Input 'hello' -> Output 'olleh'

• Example for factorial: Input 5 -> Output 120 (5*4*3*2*1)

Add two arrays element-wise and reverse the resulting array of strings.

• Iterate through both arrays and add corresponding elements together.

• Reverse the resulting array of strings.

• Handle edge cases like arrays of different lengths.

• Example: ['1', '2', '3'] + ['4', '5', '6'] = ['5', '7', '9'] -> reverse -> ['9', '7', '5']

String methods are used to manipulate and work with strings in programming languages.

• toUpperCase(): Converts a string to uppercase

• toLowerCase(): Converts a string to lowercase

• charAt(index): Returns the character at the specified index

• indexOf(substring): Returns the index of the first occurrence of a substring

• split(delimiter): Splits a string into an array of substrings based on a delimiter