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www.studtonight.com/operating-system What are Threads? Thread is an execution unit which consists of its own program counter, a stack, and a set of registers. Threads are also known as Lightweight processes. Threads are popular way to improve application through parallelism. The CPU switches rapidly back and forth among the threads giving illusion that the threads are running in parallel. As each thread has its own independent resource for process execution, multpile processes can be executed parallely by increasing number of threads. Types of Thread There are two types of threads : User Threads Kernel Threads User threads , are above the kernel and without kernel support. These are the threads that application programmers use in their programs. Kernel threads are supported within the kernel of the OS itself. All modern OSs support kernel level threads, allowing the kernel to perform multiple simultaneous tasks and/or to service multiple kernel system calls simultaneou
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1) Describes the cognitive development of adolescence and its educational implication . Piaget's (1936) theory of cognitive development explains how a child constructs a mental model of the world. He disagreed with the idea that intelligence was a fixed trait, and regarded cognitive development as a process which occurs due to biological maturation and interaction with the environment. Piaget proposed four stages of cognitive development which reflect the increasing sophistication of children's thought: 1. Sensorimotor stage (birth to age 2) 2. Pre-operational stage (from age 2 to age 7) 3. Concrete operational stage (from age 7 to age 11) 4. Formal operational stage (age 11+ - adolescence and adulthood). Adolescence is a transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood (age of majority).Adolescence is usually associated with the teenage years but its physical, psychological or cultural e
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