Marsman India Cranes Software Engineer Interview Questions and Answers

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Common commands include SELECT, INSERT, UPDATE, and DELETE

• SQL is used in a variety of industries, including finance, healthcare, and e-commerce

DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.

• DBMS is used to manage large amounts of data efficiently.

• It provides a way to store, retrieve and manipulate data in a structured way.

• Examples of DBMS include MySQL, Oracle, and Microsoft SQL Server.

A bit is the smallest unit of digital information. It can have a value of either 0 or 1.

• A bit is a binary digit, represented as either 0 or 1.

• It is the basic unit of information used in computing and digital communications.

• A group of 8 bits is called a byte.

• The size of a bit is dependent on the architecture of the computer system.

C is a programming language and does not have a fixed number of bits.

• C is a high-level programming language that can be compiled to run on different architectures with varying bit sizes.

• The number of bits in C depends on the hardware architecture it is compiled for.

• For example, C code compiled for a 32-bit architecture will have 32-bit integers, while code compiled for a 64-bit architecture will have 64-bit integers.

Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order.

• Start from the first element and compare it with the next element

• If the next element is smaller, swap them

• Repeat this process for all elements in the array

• Continue this process until no more swaps are needed

A program to print all prime numbers

• Take input from user for range of numbers

• Loop through the range and check if each number is prime

• Print the prime numbers

Hashmap is a data structure that stores key-value pairs and allows constant time access to values based on their keys.

• Hashmap uses a hash function to map keys to indices in an array.

• Collisions can occur when multiple keys map to the same index, which can be resolved using techniques like chaining or open addressing.

• Examples of hashmap implementations include Java's HashMap class and Python's dict type.

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows code reuse and promotes code organization.

• The existing class is called the parent or superclass, and the new class is called the child or subclass.

• The child class inherits all the properties and methods of the parent class and can also add new properties and methods.

• For...read more