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What is a system call?
A system call is a request made through any program to the operating system for performing tasks, picked by a predefined set, that the said program doesn't have needed permissions to execute into its individual flow of execution. System calls give the interface between the operating system and a process. Most operations interacting along with the system need permissions not available to a user level process, for example: input and output performed with a device present in the system or any form of communication along with other processes needs the use of system calls.
State the number of definitions of firewall Though there exist a number of definitions of firewall, in simplest terms it can be defined as "a mechanism used to protect a truste
Perform 2's complement subtraction of (7) 10 - (11) 10 . Ans. 2's Complements Subtraction of (7) 10 - (11) 10 Firstly convert the decimal numbers 7 and 11 to there binary e
Why a function canot have delays? However in Open Vera, delays are allowed in function. A function returns a value and hence can be used as a part of any expression. This doesn
Number systems Consider a decimal number: 7654.32 Short hand for: 7 * 103 + 6*102 + 5* 101 + 4*100 + 3*10 -1 + 2*10 -2 Likewise
Q. Explain about Transmission Media? These, also known as physical channels, can be either bounded or unbounded. Bounded media, in which signals representing data are confined
Prolog: Still we can take our card game from the previous lecture like a case study for the implementation of a logic-based expert system. So there the rules were: four cards
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Which approaches do not require knowledge of the system state? Ans. Deadlock detection, deadlock prevention and deadlock avoidance; none of the given require knowledge of the s
In a positive logic system, logic state 1 corresponds to ? Ans. For positive digital logic, we choose two voltages levels. Higher voltage shows logic 1 and a lower voltage sho
What is Control Unit Control Unit: The control unit issue control signals to perform exact operation and it directs the entire computer system to carry out keeps program instr
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