TechOnespot

 chapter-13 Other useful free tools and services  Choose the most appropriate option from those given below :  (1) Which of the following refers to a file that has an entire directory structure inside it ?  (a) apache  (b) archic  (c) archi  (d) archive  (2) What is the full form of tar ?  (a) tape archiver  (b) tech archiver  (c) test archiver  (d) tight archiver  (3) For which types of archives is the password protection option available ?  (a) zip  (b) tar  (c) tar.gz  (d) both zip and tar.gz  (4) Which of the following is a feature-rich media player ?  (a) VAC  (b) VEC  (c) VLC  (d) VNC  (5) What is the full form of VLC ?  (a) VideoLAN Client  (b) Video Line Coder  (c) Video Length Coder  (d) Video List Creater  (6) Which technology gives our location with accuracy ?  (a) GRS  (b) GPRS  (c) GRPS  (d) GPS  (7) Which program is used to enter Unicode characters into any application ?  (a) Character Display  (b) Character Insert  (c) Character Map  (d) Character Select  (8) Which comma

An array is a variable representing a collection of homogeneous type of elements. Arrays are useful to represent vector, matrix and other multi-dimensional data. Vector is a one dimensional (1-D) data structure that can be used to store list of items like characters, numbers. Arrays are useful when same operations are to be performed on various elements of the similar type. Creating an array is a two step process: 1. Declare an array object 2. Create an array object An array object can be created in two ways: 1. Using new operator and specifying the size 2. Directly initializing the content of array   To declare a 1-D array we use a pair of square brackets [ ] after array name or after data type.  Choose the most appropriate from those given below : (1) Which of the following refer to the starting index value in arrays ? (a) 0 (b) 1 (c) null (d) All of these (2) What is the size of second dimension in an array sales[5][12] ? (a) 5 (b) 12 (c) 60 (d) 10 (3) What will expression sales.len

    A class contains both data (referred to as attributes), and program cod e Creating objects Creating an object from a class requires the following steps : Declaration : A variable (reference variable) name of type class is declared with syntax <class name> <variable name> • Instantiation : Keyword new is used to create the object by allocating memory • Initialization: Constructor (a special type of method) is called to initialize the newly created Using new keyword, we can create an object. Operator new allocates the memory for an object and returns the address When an object is created, in addition to allocating memory, a special method called 'constructor is executed to perform initial task. rl = new Room(); Here, parentheses are important; In object-oriented programming (OOP) languages, creating an object is also called object instantiation. An instance for an object is created by allocating memory to store the data for that object. Instance variables define the a