UST SDE (Software Development Engineer) Interview Questions, Process, and Tips

Counting characters using streams in Java

• Use the chars() method to convert the string to an IntStream of characters

• Use the count() method to count the number of characters in the stream

To check if a linked list is circular or linear, we need to traverse the list and check if it loops back to a previous node.

• Traverse the linked list using two pointers, one moving one node at a time and the other moving two nodes at a time.

• If the faster pointer catches up to the slower pointer, then the list is circular.

• If the faster pointer reaches the end of the list without catching up to the slower pointer, then th

Count the number of set bits in a given number.

• Use bitwise AND operator with 1 to check if the rightmost bit is set.

• Shift the number to right by 1 bit and repeat the process until the number becomes 0.

• Keep a count of the number of set bits encountered.

• Example: For number 5 (101 in binary), the answer is 2 as there are 2 set bits.

• Example: For number 15 (1111 in binary), the answer is 4 as there are 4 set bits.

Segmentation fault is a type of error caused by accessing memory that “does not belong to you.”

• It occurs when a program tries to access a memory location that it is not allowed to access.

• It is often caused by programming errors such as accessing an array beyond its bounds.

• It can also be caused by hardware problems such as faulty RAM or overheating.

• Segmentation faults can be difficult to debug because they often occur i...read more