Embedded Systems Questions and Answers in Quiz Form 8 for Practice

106. Which of the following provides time period for the context switch?

1. time slice
2. time machine
3. timer
4. counter

107. Which of the following registers offers high impedance?

1. individual control bit
2. data register and data direction register
3. data register
4. data direction register

108. Which of the following signals are active low in the 8250 UART?

1. INTR4MR
2. BAUDOUT
3. DDIS

109. Which of the following statements are true for von Neumann architecture?

1. external bus for program memory and data memory
2. external bus for data memory only
3. shared bus between the program memory and data memory
4. separate bus between the program memory and data memory

110. Which of the following stores all the task information that the system requires?

1. accumulator
2. task control block
3. task access block
4. register

111. Which of the following supports seven interrupt priority level?

1. VMEbus
2. data bus
3. kernel
4. operating system

112. Which of the following technique is used by the UNIX operating system?

1. virtual memory technique
2. translational address
3. logical address memory
4. physical address memory

113. Which of the following uses its own address space?

1. task
2. kernel
3. thread
4. process

114. Which of the following works by dividing the processors time?

1. kernel
2. applications
3. single task operating system
4. multitask operating system

115. Which of the processor has an internal coprocessor?

1. 80387
2. 80486DX
3. 8087
4. 80287

116. Which of the signal can control bus arbitration logic in 8250?

1. INTR
2. RCLK
3. MR
4. DDIS

117. Which of the signal is set to one, if no data is transmitted?

1. STOP
2. TXD
3. READY
4. START

118. Which one is the floating point coprocessor of 80286?

1. 80287
2. 80387
3. 8087
4. 80187

119. Which signal is used to select the slave in the serial peripheral interfacing?

1. interrupt
2. clock signal
3. slave select
4. master select

120. Which term is used to encompass more than a simple context switch?

1. thread
2. multithread
3. process
4. single thread system