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COGNIZANT INTERVIEW QUESTIONS - 2018

1) What are different types of modifiers in C? There are 5 modifiers available in C language. They are: short, long, signed, unsigned, and long long   2) What is a static variable? A static local variable retains its value between the function call and the default value is 0. 3) a++ or a = a+1, which can be recommended to increment the value by 1 and why? a++, as it is single machine instruction  internally.   4) What is a dangling pointer? A pointer initially holding a valid address, but later the held address is released or freed. Then such a pointer is called as a dangling pointer. 5) What are lvalue and rvalue? The expression appearing on the right side of the assignment operator is called as rvalue. Rvalue is assigned to an lvalue, which appears on the left side of the assignment operator. The lvalue should designate to a variable not a constant. 6) Explain the use of %i format specifier w.r.t scanf(). Can be used to input integer in all the suppor...
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FAQS IN JAVA

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asic Java Interview Questions Q1. Explain JDK, JRE and JVM? JDK vs JRE vs JVM JDK JRE JVM It stands for Java Development Kit. It stands for Java Runtime Environment. It stands for Java Virtual Machine. It is the tool necessary to compile, document and package Java programs. JRE refers to a runtime environment in which java bytecode can be executed. It is an abstract machine. It is a specification that provides run-time environment in which java bytecode can be executed. Along with JRE, it includes an interpreter/loader, a compiler (javac), an archiver (jar), a documentation generator (javadoc) and other tools needed in Java development. In short, it contains JRE + development tools. It implements the JVM (Java Virtual Machine) and provides all the class libraries and other support files that JVM uses at runtime. So JRE is a software package that contains what is required to run a Java prog...
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Cognizant Technical Interview Questions

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C language What is a pointer? The pointer in C language is a variable which stores the address of another variable. This variable can be of type int, char, array, function, or any other pointer. The size of the pointer depends on the architecture. However, in 32-bit architecture, the size of a pointer is 2 byte. Consider the following example to define a pointer which stores the address of an integer. int n = 10;    int* p = &n; // Variable p of type pointer is pointing to the address of the variable n of type integer.      2. What is a dangling pointer? Dangling pointers arise when an object is deleted or de-allocated, without modifying the value of the pointer, so that the pointer still points to the memory location of the de-allocated memory. In short pointer pointing to non-existing memory location is called  dangling pointer. Example:Using free or de-allocating memory #include...
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