Pennybase Technology Solutions Software Engineer Interview Questions, Process, and Tips

Java is platform independent because of its bytecode and JVM.

• Java code is compiled into bytecode which can run on any platform with a JVM

• JVM acts as a virtual machine that interprets the bytecode and executes it

• This makes Java code platform independent and portable

• Java's write once, run anywhere (WORA) principle is based on this

Channels and goroutines are concurrency features in Go programming language.

• Goroutines are lightweight threads that allow concurrent execution of functions.

• Channels are used for communication and synchronization between goroutines.

• Channels can be used to pass data between goroutines.

• Channels can be buffered or unbuffered.

• Buffered channels have a fixed size and can hold a limited number of values.

• Unbuffered channels hav...read more

Cloud computing is the delivery of computing services over the internet.

• VMs are virtual machines that emulate a complete hardware system, while containers are lightweight and share the host OS kernel.

• An interpreter translates code into machine language one line at a time, while a compiler translates the entire code into machine language at once.

Coin change problem is solved by dynamic programming to find minimum number of coins needed to make a given amount.

• Create an array to store minimum number of coins needed for each amount from 0 to target amount

• Iterate through each coin denomination and update the array for each amount

• Return the value at target amount index of the array