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The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
A S is open
B T is open
C U is open
D y is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?
A S is open
B T is open
C T is closed
D Y is closed
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?
A R is open
B S is open
C T is open
D Z is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. Which of the following, if given to the mixing vat operator as an instruction, would not determine the setting of any other valve ?
A S must be open
B T must be open
C U must be open
A software requirement specification is : i) A contract between developers and clients specifying what the developers will produce for the clients. ii) A specification of the features that the target software deliverable must have iii) A specification of the personal and resources that will be committed to the software development effort
A i only
B ii only
C i and ii only
D i and iii only
Which one of the following is an example of Open Source Operating System?
A Redhat Linux
B Windows 98
C Windows XP
D DOS
Which one of the following is not an open source operating system?
A Linux
B Unix
C Windows
D Sun Solaris
Which of the following is an open source operating system ?
A Vista
B UBUNTU
C DOS
D Windows XP
Which open-source operating system is based on the Linux kernel and is known for its security, stability, and use in server environments? . 
A Ubuntu
B Windows
C CentOS
D macOS
নিচের কোনটি একটি উন্মুক্ত অপারেটিং সিস্টেম(Open Source Operating System)
A Redhat linux
B Windows 98
C Windows XP
D DOS

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