10+ Magic Infomedia Interview Questions and Answers

Use the jugs to measure out a specific amount of water by filling and pouring between the jugs.

• Fill the largest jug and pour into the other jugs to measure out specific amounts.

• Use the jugs to transfer water back and forth until you have the desired amount in one of the jugs.

• Repeat the process of filling and pouring until you have the correct amount of water in one of the jugs.

The angle between the minute and hour hand of a clock at 3:45 is 157.5 degrees.

• Calculate the angle formed by the hour hand from 12 o'clock position to 3:45 position (135 degrees)

• Calculate the angle formed by the minute hand from 12 o'clock position to 3:45 position (22.5 degrees)

• Subtract the smaller angle from the larger angle to get the angle between the two hands (157.5 degrees)

Indexing in DBMS is a technique used to improve the performance of queries by allowing faster retrieval of data.

• Indexes are data structures that store a small portion of the data set in an easily searchable format.

• They help in speeding up the data retrieval process by reducing the number of disk accesses needed.

• Indexes can be created on one or more columns of a table to improve the performance of SELECT queries.

• Examples of indexes include primary keys, unique keys, and compos...read more

Print k most repeating integers from an array

• Create a hashmap to store the frequency of each integer in the array

• Sort the hashmap based on frequency in descending order

• Print the first k keys from the sorted hashmap

The lifecycle of a React component includes mounting, updating, and unmounting phases.

• Mounting phase: constructor, render, componentDidMount

• Updating phase: shouldComponentUpdate, render, componentDidUpdate

• Unmounting phase: componentWillUnmount

The pillars of Oops are Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components within a class, protecting the data from outside interference.

• Polymorphism allows objects to be treated as instances of their parent class, enabling flexibility in code.

• Abstraction hides the complex implementation details of a class, allowing users to interact wit...read more

To delete an entry in MongoDB database, you can use the deleteOne() or deleteMany() methods.

• Use deleteOne() method to delete a single document based on a specific condition

• Use deleteMany() method to delete multiple documents based on a specific condition

• Make sure to specify the filter criteria to accurately delete the desired entry

Reverse individual strings in a big string with spaces

• Split the big string into an array of strings using spaces as delimiter

• Reverse each individual string in the array

• Join the reversed strings back together with spaces in between

Find duplicates in an array of strings

• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found