10+ Swaraj Equipment Interview Questions and Answers

Answers to questions related to software engineering concepts.

• Volatile is a keyword used to indicate that a variable's value can be changed unexpectedly.

• Constant is a keyword used to indicate that a variable's value cannot be changed once it is assigned.

• Volatile and const can be used together to indicate that a variable's value cannot be changed and that it may change unexpectedly.

• ISR stands for Interrupt Service Routine and is a function that is called when an interrupt occu...read more

A pointer is a variable that stores the memory address of another variable. Dangling, null, and void pointers are types of pointers.

• Dangling pointer: a pointer that points to a memory location that has been deallocated or freed

• Null pointer: a pointer that does not point to any memory location

• Void pointer: a pointer that has no specific data type and can point to any data type

Storage classes in C define the scope and lifetime of variables.

• auto: default storage class for local variables

• register: stores variables in CPU registers for faster access

• static: retains value between function calls

• extern: used to access global variables across multiple files

CAN data frame is a message format used in Controller Area Network (CAN) protocol.

• CAN data frame consists of 7 fields: Start of Frame (SOF), Arbitration ID, Control Bits, Data Length Code (DLC), Data Field, Cyclic Redundancy Check (CRC), and End of Frame (EOF).

• The Arbitration ID field is used to identify the message priority and the source of the message.

• The Data Field can contain up to 8 bytes of data.

• The CRC field is used to detect errors in the message.

• CAN data frame can b...read more

To delete an element in a linked list, we need to find the node before the node to be deleted and update its next pointer.

• Find the node before the node to be deleted

• Update the next pointer of the previous node to point to the node after the node to be deleted

• Free the memory occupied by the node to be deleted

Program to find first letters in a sentence

• Split the sentence into words

• Get the first letter of each word

• Store the first letters in an array

Program to check if a given string is a palindrome or not

• Convert the string to lowercase to ignore case sensitivity

• Use two pointers, one at the start and one at the end of the string

• Compare the characters at both pointers and move them towards each other

• If all characters match, it is a palindrome

Questions on abstract class vs interface, internal working of hashmap, and Java 8 features.

• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.

• Interface is a collection of abstract methods and constants that can be implemented by a class.

• HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values.

• Java 8 introduced features like lambda expressions, functional interfaces, and streams for easie...read more

Basic codes for array manipulation including sorting, searching, and filtering.

• Use built-in functions like sort() for sorting arrays.

• Implement algorithms like binary search for searching in arrays.

• Utilize filter() method for filtering arrays based on specific criteria.

A function in C to check if a number is prime or not

• Create a function that takes an integer as input

• Check if the input number is divisible by any number from 2 to its square root

• If it is not divisible by any number, return true (prime), else return false (not prime)