Which, of the following, is true for testing and debugging?
Options: Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program, Testing detects the syntax errors in the program while debugging corrects those errors in the program, Testing and debugging indicate the same thing, All of the above
3.In system modeling : A-Complementary system model : B-Context model: CComposition model (1) Here entity-relation (E-R) diagram show how entities in the system are composed of other 90 | entities.2-Shows how the system being modeled is positioned, in an environment with other systems and process. 3-Present different information about the system.
Options: Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line., HDLC is a standard synchronous communication protocol., RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data., RTS/CTS is the way the terminal indicates ringing
Options: always increases as the applied frequency increases, is equal to the sum of the values of resistance, inductive reactance and capacitive reactance, always decreases as the applied frequency increases, is maximum at the resonant frequency
Before any changes to database structure are attempted one should first:
Options: clearly understand the current structure and contents of the database only., test any changes on a test database only., create a complete backup of the operational database only., All of the above should be done.