Taehwa Enterprises Interview Questions, Process, and Tips

C programs and linked list related programs. In c mainly focus on strings and arrays

Q1. C concepts like storage classes, pointers and protocols like spi, i2c
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Q2. Explain about Extern What's the difference between static and extern
Ans. 
Extern and static are storage classes in C programming language.
• Extern is used to declare a variable or function that is defined in another file.

• Static is used to declare a variable or function that is only accessible within the same file.

• Extern variables have global scope while static variables have local scope.

• Extern functions can be used in other files while static functions cannot be used outside the file they are
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Round duration - 30 minutes
Round difficulty - Easy

Q1. How do you search for a node in a linked list?
Ans. 
To search for a node in a linked list, iterate through the list and compare each node's value with the target value.
• Start at the head of the linked list

• Iterate through each node by following the 'next' pointer

• Compare the value of each node with the target value

• Return the node if found, otherwise return null
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Q2. How do you detect a loop in a linked list?
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To detect a loop in a linked list, we can use Floyd's Cycle Detection Algorithm.
• Initialize two pointers, slow and fast, at the head of the linked list.

• Move slow pointer by one step and fast pointer by two steps.

• If there is a loop, the two pointers will eventually meet.

• Alternatively, we can use a hash set to store visited nodes and check for duplicates.
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Q3. Implement a stack using a singly linked list.
Ans. 
Implement a stack using a singly linked list
• Create a Node class with data and next pointer

• Create a Stack class with top pointer pointing to the top of the stack

• Implement push, pop, and peek operations by manipulating the linked list

• Example: Node class - Node { int data; Node next; }
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Round duration - 40 minutes
Round difficulty - Easy

Q1. What is the top view of a binary tree?
Ans. 
The top view of a binary tree shows the nodes visible from the top when looking down from the root node.
• The top view of a binary tree is the set of nodes visible from the top when looking down from the root node.

• Nodes at the same horizontal distance from the root are considered at the same level in the top view.

• If multiple nodes are at the same horizontal distance, only the topmost node at that level is included in the...read more
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Q2. Explain the process of deleting a node from a linked list, covering all possible cases.
Ans. 
Deleting a node from a linked list involves updating pointers to maintain the list's integrity.
• Identify the node to be deleted by traversing the list

• Update the previous node's next pointer to skip the node to be deleted

• Free the memory allocated to the node to be deleted
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