NCS Group of Companies Engineer Interview Questions and Answers

Swapping two numbers without using a temp variable

• Use arithmetic operations to swap the values

• Add the two numbers and store the result in the first variable

• Subtract the second variable from the result and store it in the second variable

• Subtract the second variable from the first variable to get the original value of the second variable

• Example: a=5, b=7; a=a+b=12, b=a-b=5, a=a-b=7

Java is a high-level programming language used for developing applications and software.

• Java is object-oriented and platform-independent.

• It is used for developing web, mobile, and desktop applications.

• Java code is compiled into bytecode and executed by the Java Virtual Machine (JVM).

• Popular frameworks and tools for Java development include Spring, Hibernate, and Maven.

Name mangling is a technique used by compilers to give unique names to functions and variables to avoid naming conflicts.

• Name mangling is used in C++ to support function overloading.

• It is also used in Python to avoid naming conflicts in modules.

• Name mangling can make it difficult to access variables and functions from outside the class in which they are defined.

• In C++, name mangling can be seen by using the 'nm' comman