Computer Science Questions

predictive analysis is synonymous with data mining

You are creating a video and animation sharing Web site whose content will be supplied by content, video, and applets stored in a database and you anticipate very high loads on the server. Which of the following DBMSs will most likely serve your needs?A) object-relational DBMSB) relational DBMSC) hierarchical DBMSD) OODBMS

a data warehouse may be updated by a legacy system

Tools for analyzing data to help users find patterns, relationships, and insights and make better business decisions are known asA) DSS.B) business intelligence.C) OLAP.D) data mining.

A data mart usually can be constructed more rapidly and at lower cost than a data warehouse becauseA) a data mart typically focuses on a single subject area or line of business.B) all the information is historical.C) a data mart uses a Web interface.D) all of the information belongs to a single company.

Which of the following about Atomic action is true? *1/1Possibly going to sleepAll of the other choices Checking the valueChanging the value

Which of the following conditions that causes the processes to be terminated, when a processes have done their work? *1/1Normal exit (voluntary )Error exit (voluntary)Fatal error (involuntary)Killed by another process (involuntary)

A entry of the Process table is called: *1/1Process control block Process management blockAll of the other choicesProcess check block

A process where no concurrency inside process; everything happens sequentially is called: *1/1Random access processSequential process Sequential access processNone of the other choices

How many ways are Thread implemented? *1/13214

Which of the following is not correct about user-level threads? *1/1User-level threads are more efficient than kernel threads, in the sense that they do not need kernel calls to switch among threadsWith user-level threads, customized scheduling algorithms cannot be implemented User-level threads cannot be preempted by clock interrupts unless the whole process' quantum has been used upIf one user-level thread makes a blocking system call, the system will block the entire process (which contains that user-level thread)

When selecting the proper time quantum it should be long enough to allow ____ percent of the CPU cycles to run to completion *1/14010080 20

A computer has 2GB RAM of which the operating system occupies 1GB.The processes are all 450 MB and have the same characteristics. How many percent is CPU utilization when these programs are idle waiting for I/O 20% of the time? *1/190%None of the other choices96% 4%

Which is the correct description of transitions between process states below? (see picture) *1/1Captionless Image1: Process blocks for input; 2: Input becomes available; 3: Scheduler picks another process; 4: Scheduler picks this process1: Process blocks for input; 2: Scheduler picks this process; 3: Scheduler picks another process; 4: Input becomes available1: Process blocks for input; 2: Input becomes available; 3: Scheduler picks this process; 4: Scheduler picks another process1: Process blocks for input; 2: Scheduler picks another process; 3: Scheduler picks this process; 4: Input becomes available

Which of the events that causes the processes to be created, when a running process creates one or more new process to help it to do its job? *1/1Execution of a process creation system callInitiation of a batch jobUser request to create a new processSystem initialization

What is Software proposal in the solution of Mutual exclusion with Busy waiting *1/1Peterson's SolutionAll of the other choicesLock VariablesStrict Alternation

The following requirement must be met by any facility or capability that is to provide support for mutual exclusion: *1/1Only one process at a time can be allowed into a critical sectionNo assumption can be made about relative process speedsAll of the other choicesA process remains in its critical region for a finite time only

Which is a advantage of implementing threads in the kernel? *1/1None of the other choicesIs good for multiprocessor architecture and if one thread is blocked does not cause the other thread to be blockedIf one thread is blocked does not cause the other thread to be blockedIs good for multiprocessor architecture

Which conditions of mutual exclusion does the Lock Variables (Software proposal ) violate *1/1No assumptions made about speeds or numbers of CPUsNo two processes simultaneously in critical region No process must wait forever to enter its critical regionNo process running outside its critical region may block another process

What is not a field in the process table that relates memory management? *0/1Pointer to data segment infoPointer to stack segment infoPointer to text segment infoPointer to program segment info