Information Retrieval System MCQs with answers Page - 26

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Q. Which of the following step is not involved in the factorization process?

• (A) converting the given system to matrix form
• (B) the matrix is decomposed into the product of lower and upper triangular matrix
• (C) finding the unknowns using matrix multiplication
• (D) elimination of unknowns using back substitution

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Correct answer - Option (D)

Explanation:

the first step is to convert the given system to matrix form. and then after using this method the matrix is decomposed into the product of lower and upper triangular matrix. lastly, the unknowns are found using matrix multiplication.

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Q. Errors may occur in performing numerical computation on the computer due to which of the following reasons?

• (A) rounding errors
• (B) power fluctuation
• (C) operator fatigue
• (D) back substitution

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Correct answer - Option (A)

Explanation:

rounding errors generally produces errors while performing numerical computation on the computer. power fluctuation and operator fatigue are not the general problems which occur in performing numerical computations.

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Q. What is the other name for factorization method?

• (A) doolittle’s method
• (B) lin bairstow method
• (C) muller’s method
• (D) decomposition method

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Correct answer - Option (A)

Explanation:

another name for factorization method is doolittle’s method as doolittle’s method is basically an algorithm of factorization method.

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Q. What is the principle of factorization?

• (A) there exists no inverse for a singular matrix
• (B) determinant of an identity matrix is one
• (C) every square matrix can be expressed as a product of a lower triangular matrix and upper triangular matrix
• (D) every matrix can be expressed as a sum of a skew symmetric and a symmetric matrix

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Correct answer - Option (C)

Explanation:

the principle of factorization is that every square matrix can be expressed as a product of a lower triangular matrix and upper triangular matrix. on the basis of this fact, these lower and upper triangular matrices help us in finding the unknowns.

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Q. What is the condition applied in factorization method?

• (A) matrix should not be singular
• (B) back substitution should be done
• (C) there must exist a diagonal matrix form of the given matrix
• (D) all principal minors of the matrix should be non-singular

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Correct answer - Option (D)

Explanation:

the necessary condition for factorization method is that all principal minors of the matrix should be non-singular. otherwise, there will be no formation of lower and upper triangular matrix.

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Q. While solving a system of linear equations, which of the following will be the order of the decomposed matrices; L and U?

• (A) order of l = 3x1, order of u = 1x3
• (B) order of l = 3x2, order of u = 2x3
• (C) order of l = 3x3, order of u = 3x3
• (D) order of l = 3x4, order of u = 4x3

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Correct answer - Option (C)

Explanation:

the order of the decomposed matrices of a given matrix of the coefficient of

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Q. TCP/IP model does not have layer but OSI model have this layer.

• (A) session layer
• (B) transport layer
• (C) application layer
• (D) network layer

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Correct answer - Option (A)

Explanation:

in osi reference model, there are two layers which are not present in tcp/ip model. they are presentation and session layer. the functions of presentation and session layer in the osi model are handled by the transport layer itself in tcp/ip.

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Q. TCP/IP model was developed the OSI model.

• (A) prior to
• (B) after
• (C) simultaneous to
• (D) with no link to

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Correct answer - Option (A)

Explanation:

several tcp/ip prototypes were developed at multiple research centers between 1978 and 1983, whereas osi reference model was developed in the year 1984. tcp/ip was developed with the intention to create a model for the internet while osi was intended to be a general network model.

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Q. Which layer is responsible for process to process delivery in a general network model?

• (A) network layer
• (B) transport layer
• (C) session layer
• (D) data link layer

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Correct answer - Option (B)

Explanation:

the role of transport layer (layer 4) is to establish a logical end to end connection between two systems in a network. the protocols used in transport layer is tcp and udp. the transport layer is responsible for segmentation of the data. it uses ports for the implementation of process-to-process delivery.

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